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WO2017032343A1 - Procédé et appareil de transmission de séquence he-ltf - Google Patents

Procédé et appareil de transmission de séquence he-ltf Download PDF

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Publication number
WO2017032343A1
WO2017032343A1 PCT/CN2016/096973 CN2016096973W WO2017032343A1 WO 2017032343 A1 WO2017032343 A1 WO 2017032343A1 CN 2016096973 W CN2016096973 W CN 2016096973W WO 2017032343 A1 WO2017032343 A1 WO 2017032343A1
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WO
WIPO (PCT)
Prior art keywords
sequence
ltf
value
resource block
subcarrier
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2016/096973
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English (en)
Chinese (zh)
Inventor
薛鑫
王宁娟
刘乐
林伟
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN201510849062.4A external-priority patent/CN106487737B/zh
Priority to ES16838601T priority Critical patent/ES2790383T3/es
Priority to EP25184864.4A priority patent/EP4645788A2/fr
Priority to EP16838601.9A priority patent/EP3334112B1/fr
Priority to AU2016312080A priority patent/AU2016312080B2/en
Priority to MX2018002300A priority patent/MX383648B/es
Priority to JP2018510392A priority patent/JP6463552B2/ja
Priority to KR1020187006056A priority patent/KR102028661B1/ko
Priority to EP23172732.2A priority patent/EP4280554A3/fr
Priority to EP21165745.7A priority patent/EP3937445B1/fr
Priority to PL16838601T priority patent/PL3334112T3/pl
Priority to SG11201801055TA priority patent/SG11201801055TA/en
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to MYPI2018700567A priority patent/MY201594A/en
Priority to EP19189060.7A priority patent/EP3657749B1/fr
Priority to CA2995892A priority patent/CA2995892C/fr
Publication of WO2017032343A1 publication Critical patent/WO2017032343A1/fr
Priority to ZA201800863A priority patent/ZA201800863B/en
Priority to US15/905,567 priority patent/US10645687B2/en
Anticipated expiration legal-status Critical
Priority to US16/355,385 priority patent/US10616882B2/en
Priority to US16/694,695 priority patent/US11265873B2/en
Priority to US17/683,103 priority patent/US11843493B2/en
Priority to US18/512,013 priority patent/US20240205064A1/en
Priority to US19/030,207 priority patent/US20250260608A1/en
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes

Definitions

  • the present invention relates to the field of wireless communication technologies and, more particularly, to a method and apparatus for transmitting HE-LTF sequences.
  • WLAN Wireless Local Area Network
  • Orthogonal Frequency Division Multiplexing OFDM
  • OFDMA Orthogonal Frequency Division Multiple Access
  • the OFDMA technology divides the air interface time-frequency resources into a plurality of orthogonal time-frequency resource blocks (RBs).
  • the RBs may be shared in time and orthogonal in the frequency domain.
  • the LTF of 80 MHz or the LTF of 160 MHz in the 802.11ac standard is used as a basic template, and the value of the carrier part corresponding to the resource block scheduled by the user in the OFDMA mode is extracted therefrom, and the value of the carrier part not corresponding to the resource block is padded with 0.
  • the Peak to Average Power Ratio (PAPR) is higher.
  • Embodiments of the present invention provide a method for transmitting wireless local area network information to reduce a peak average power ratio.
  • a method of transmitting wireless local area network information including:
  • the HE-LTF sequence is specifically a sequence in each embodiment
  • the corresponding sequence segments in the HE-LTF sequence are transmitted according to the RU size and RU location allocated for the station.
  • a method for receiving a wireless local area network PPDU includes:
  • the HE-LTF sequence is specifically a sequence in each embodiment
  • the corresponding HE-LTF sequence segment is selected as the channel estimation reference sequence corresponding to the RU at the receiving end.
  • means for performing the aforementioned method such as an AP or STA, or a corresponding chip, are provided.
  • the HE-LTF sequence provided by the embodiment of the present invention has a relatively low PAPR in the next generation wireless local area network.
  • 1a, 1b, and 1c are tone plans of different bandwidths in an OFDMA transmission mode according to an embodiment of the present invention
  • 2a, 2b are schematic diagrams of PAPRs obtained if LTF simulations of 802.11ac are used.
  • FIG. 3 is a simplified schematic diagram of a wireless local area network according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram showing a simple data structure of a PPDU in a multi-user transmission mode according to an embodiment of the present invention
  • 5a, 5b, 5c, and 5d are tone plans including pilot positions in different bandwidths of an OFDMA transmission mode according to an embodiment of the invention.
  • Figure 6 is a schematic diagram of a PAPR simulated in a poor implementation.
  • 7a, 7b are simplified schematic views of the embodiment of the present invention in the uplink and downlink directions, respectively.
  • Figure 8a and Figure 8b show the PAPR values obtained by simulation using a better 2x HE-LTF sequence at 20MHz bandwidth.
  • Figure 9 shows the PAPR value obtained by simulation using a better 2x HE-LTF sequence at 40MHz.
  • Figure 10 and Figure 11 show the PAPR values obtained by simulation using a better 2x HE-LTF sequence at 80MHz.
  • Figure 12 shows the PAPR value obtained by simulation using a better 4x HE-LTF sequence at 20MHz bandwidth.
  • Figure 13 shows the PAPR value obtained by simulation using a better 4x HE-LTF sequence at 40MHz bandwidth.
  • Figure 14 shows the PAPR value obtained by simulation using a better 4x HE-LTF sequence at 80MHz bandwidth.
  • FIG. 15 is a block diagram of an access point in accordance with an embodiment of the present invention.
  • Figure 16 is a block diagram of a station in accordance with an embodiment of the present invention.
  • WLAN Wireless Local Area Networks Wireless LAN
  • An Access Point which can also be called a wireless access point or bridge or hotspot, can access a server or a communication network.
  • a station which may also be referred to as a user, may be a wireless sensor, a wireless communication terminal, or a mobile terminal, such as a mobile phone (or "cellular" phone) that supports WiFi communication functions and a computer with wireless communication capabilities.
  • a mobile phone or "cellular" phone
  • it may be a portable, pocket-sized, handheld, computer-built, wearable, or in-vehicle wireless communication device that supports WiFi communication functions, and exchanges communication data such as voice and data with the wireless access network.
  • next-generation wireless LAN standard 802.11ax is dedicated to further improving WLAN spectrum efficiency, regional throughput, actual user experience, and performance in a variety of indoor and outdoor dense network deployment environments.
  • the solution also requires suppression of inter-device interference to meet large-scale, High load networking requirements, etc.
  • OFDM symbols are constructed with 64-FFT in 20 MHz, 52 data subcarriers and 4 subcarriers in 56 subcarriers in total, and OFDM symbols are constructed with 128-FFT in 40 MHz, and 108 data subcarriers and 6 subcarriers in total 128 subcarriers
  • the carrier, while the 256-FFT constructs an OFDM symbol, has 234 data subcarriers and 8 subcarriers out of a total of 256 subcarriers.
  • the following tone plan (subcarrier distribution of data carrying) is adopted, and the positional relationship of different resource blocks (RU: resource unit) is as shown in FIG. 1a-1c, wherein the arrow indicates the residual subcarrier between the RUs.
  • the location, the number of large RU subcarriers and the corresponding number of small RUs that can be accommodated therein and the number of residual subcarriers between small RUs are the same.
  • FIG. 1a a simple schematic diagram of an OFDMA allocateable resource block (in English, a tone plan, or a resource block distribution) in FIG. 1b
  • FIG. 1b is a simple schematic diagram of an OFDMA resource block position in 40 MHz
  • FIG. 1c is within 80 MHz.
  • the OFDMA multi-user data packet in 802.11ax is a combination of multiple resource blocks (RU: resource unit).
  • the AP allocates one RU to each user.
  • the optional RUs that may be assigned to the user are:
  • RUs consisting of 26 consecutive subcarriers, including: 24 data subcarriers and 2 pilot pilot subcarriers;
  • RUs consisting of 52 consecutive subcarriers, including: 48 data subcarriers and 4 pilot pilot subcarriers;
  • RUs consisting of 106 consecutive subcarriers, including: 24 data subcarriers and 2 pilot pilot subcarriers;
  • RUs consisting of 242 consecutive subcarriers, including: 234 data subcarriers and 8 pilot pilot subcarriers;
  • RUs consisting of 484 consecutive subcarriers, including: 468 data subcarriers and 16 pilot pilot subcarriers;
  • RUs consisting of 996 consecutive subcarriers, including: 980 data subcarriers and 16 pilot pilot subcarriers.
  • 484-RU is used in 40MHz multi-user transmission
  • 996-RU is used in 80/160MHz multi-user transmission.
  • 160MHz can be seen as a combination of two 80MHz tone plans.
  • the subcarrier position indicated by the arrow in Figures 1a, 1b, 1c is the position of the aforementioned pilot subcarrier.
  • the HE-LTF for channel estimation in the 802.11ax system adopts two modes of 2x and 4x, and the 4x mode refers to the subcarrier number index of the HE-LTF sequence mapping and the resource block distribution of the data part.
  • the serial number is the same; and the 2x mode means that the HE-LTF serial number corresponds to the number of the 4x HE-LTF divided by 2, that is, the subcarrier number index of the HE-LTF sequence mapping and the resource block distribution in the data part.
  • the half of the subcarrier number is the same.
  • the tone plan of the OFDMA transmission in the 802.11ax system is different from the tone plan of the OFDM in the existing 802.11ac system. Therefore, the 20/40 VHT-LTF sequence defined in 802.11ac itself cannot be applied.
  • the total number of subcarriers of 80 MHz in 802.11ac is the same as the total number of subcarriers of 20 MHz in 802.11ax, but the peak value and the mean ratio (PAPR: Peak-to) are found directly in the 802.11ax 20 MHz bandwidth using the VHT-LTF sequence. -average power ratio) is relatively high.
  • 802.11ax is in the 40/80MHz tone plan, the number of subcarriers has exceeded the traditional sequence, and the VHT-LTF sequence of 802.11ac cannot be reused.
  • FIG. 3 is a simplified schematic diagram of a WLAN system to which an embodiment of the present invention is applied.
  • the system of Figure 3 includes one or more access points AP 101 and one or more stations STA 102.
  • the OFDMA technology is used for wireless communication between the access point 101 and the station 102.
  • FIG. 4 it is a frame structure of a possible AP sending data packet PPDU for the downlink WLAN system.
  • it complies with the relevant provisions of 802.11ax.
  • the information indicating the transmission bandwidth of the downlink user STA is included in the HE-SIG-A, and is included in the HE-SIG-B for indicating The information about the size and location of the RU allocated by the downlink scheduled user, or the scheduling information corresponding to the STA ID and other spatial stream numbers or modulation codes of each scheduled user.
  • the HE-SIG-A or HE-SIG-B may further include: a HE-LTF length for indicating alignment of a plurality of users, that is, a symbol number N of the HE-LTF.
  • the number of pilot subcarriers, the location of the pilot subcarrier, and the transmission mode are given.
  • the corresponding content can refer to "Motion #3, October 29, 2014, Removed with Motion 10, March 6, 2015 below"
  • the transmission method is: the pilot of the 802.11ax HE-LTF is transmitted in a single stream (similar to 802.11ac) in single-user, uplink-downlink OFDMA, and downlink MU-MIMO transmission.
  • the HE-LTF sequence of each STA is multiplied by the identification code assigned by the AP, and the AP can estimate the CFO of each STA by using the frequency identification code of each STA, so There is no special pilot subcarrier in the HE-LTF sequence of the MU-MIMO, which is different from the HE-LTF sequence of the downlink MU-MIMO.
  • some HE-LTF or methods of constructing HE-LTF are provided, but none of the effects of the pilot are considered, and the PAPR is relatively high in the corresponding method.
  • a Barker sequence of length 13, i.e. as x, to generate a sequence of length 121 according to the Barker sequence is represented by M 1, while finding the Barker sequence of lengths of 7 and 13, They are represented by M 2 and M 3 , respectively.
  • the specific sequence is represented as follows:
  • M 1 [-x,x,-x,-x,x,-x,-x,-x,-x,x,x,x,x];%121 tones
  • M 3 [+1 +1 +1 -1 -1 +1 -1];%Barker 7 tones
  • the HELTF sequence in the 2x/4x mode is constructed using the x, M 1 , M 2 , M 3 sequences.
  • the constructed HELTF sequence is as follows:
  • LTF 242 (-122:2:122) [M 1 (61:121),0,M 1 (1:61)];
  • LTF 996 (-500:2:500) [-M 1 ,-M 1 ,M 3 ,0,0,0,M 3 ,M 1 ,-M 1 ];
  • LTF 242 (-122:122) [M 1 ,0,0,0,M 1 ];
  • LTF 484 [M 1 , M 1 , 0, 0 , 0, 0 , 0, M 1 , -M 1 ];
  • the PAPR variation range is large in different cases, and in some cases PAPR bigger.
  • the previously mentioned case means that the pilot subcarrier phase change corresponds to the first row in P-maxtrix, and the other subcarrier phase changes correspond to the corresponding row in the P-matrix with the spatial stream.
  • the result of the PAPR is as follows, wherein the pilot subcarrier does not change the phase, and the fixed is multiplied by '+1', and the other subcarriers change the phase, and are respectively multiplied by '+1', '-1'. , 'w' or 'w 2 ', the PAPR corresponding to each row is shown in Figure 6. It can be seen that the PAPR varies greatly, and some PAPRs have exceeded 7dB.
  • the corresponding HE-LTF sequence has a lower PAPR when different values are set due to the pilot position.
  • the hardware implementation can also achieve low storage capacity and easy implementation.
  • a method of transmitting an HE-LTF sequence comprising:
  • the HE-LTF sequence is specifically a sequence in subsequent embodiments
  • a sequence segment corresponding to the location of the HE-LTF sequence is transmitted according to the RU size and the RU location in the resource allocation information.
  • the AP sends a data packet PPDU, where the PPDU can refer to the structure shown in FIG. 4, including:
  • the AP obtains a HE-LTF sequence corresponding to the bandwidth according to the total transmission bandwidth.
  • the HE-LTF sequence may be stored on the AP or may be constructed according to certain principles. For specific examples, reference may be made to subsequent examples.
  • 102 Obtain a corresponding HE-LTF sequence segment from the HE-LTF sequence according to the resource block RU size and the RU location allocated by the scheduled user, and map the HE-LTF sequence segment to the allocated RU subcarrier position. Send it out.
  • the AP allocates one row in the P-matrix matrix of size NxN to each stream on the RU as a signature for distinguishing the stream. Specifically, when transmitting the HE-LTF sequence of each stream on the RU, the tone plan on the nth symbol of the HE-LTF removes the length value other than the pilot subcarrier position, and multiplies the corresponding feature code used to distinguish the stream. The nth code word. It is known to those skilled in the art that the processing of the pilot subcarrier position is processed according to the prior art solution, and details are not described herein again.
  • a method for a downlink scheduled STA to receive an 802.11ax packet PPDU includes:
  • the scheduled STA receives the PPDU, and obtains the total transmission bandwidth indicated by the AP in the HE-SIG-A.
  • the HE-LTF sequence may be stored on the AP or the STA, or may be constructed according to certain principles. For specific examples, reference may be made to subsequent embodiments.
  • the scheduled STA identifies its own scheduled indication information by using its own STA ID according to the HE-SIG-B in the PPDU, where the size of the RU allocated by the AP to the user and the location of the RU are obtained. Selecting, according to the indicated RU size and location, a corresponding HE-LTF sequence segment from the HE-LTF sequence corresponding to the total bandwidth of the transmission, as a channel estimation reference sequence corresponding to the RU of the receiving end, for performing subsequent channels. Estimated operation, the principle of which is not described here.
  • the uplink STA sends the 802.11ax packet PPDU.
  • the AP indicates the uplink scheduling information by using the trigger frame, including the uplink user STA transmission bandwidth, the uplink scheduled STA ID, and the RU size and location allocated for the STA.
  • the length of the HE-LTF is the number of symbols N
  • the STA obtains an HE-LTF sequence corresponding to the bandwidth according to the indicated total bandwidth of the transmission.
  • the HE-LTF sequence may be stored on the AP or the STA, or may be constructed according to certain principles. For specific examples, reference may be made to subsequent embodiments.
  • the STA selects a HE-LTF sequence segment of the corresponding location from the HE-LTF sequence according to the allocated resource block RU size and the RU location, so that the mapping is sent out at the allocated RU subcarrier position.
  • the uplink AP receives the 802.11ax packet PPDU, the following:
  • the AP obtains a HE-LTF sequence corresponding to the bandwidth according to the total transmission bandwidth.
  • the HE-LTF sequence may be stored on the AP or may be constructed according to certain principles. For specific examples, reference may be made to subsequent embodiments.
  • the AP selects a corresponding HE-LTF sequence segment from the HE-LTF sequence according to the resource block RU size and the RU location allocated by each uplink scheduled user (station), and performs channel estimation as a reference sequence of the RU. .
  • 802.11ax compliant data packets may have transmission modes or data structures such as SU, MU, or OFDMA.
  • the HE-LTF sequence proposed by the embodiments of the present invention is not limited to application to a specific data structure, but can be applied to transmission of various data packets conforming to the 802.11ax standard.
  • the resource block RU size and the RU location allocated for the site mentioned in the foregoing embodiments are the entire bandwidth used by the current transmission. This article will not go into details.
  • a method for constructing a HE-LTF sequence is provided, which can be applied to the foregoing embodiments, in particular, for the size and location of different resource blocks RU in the 802.11ax OFDMA tone plan:
  • the small RU may refer to the aforementioned RU with a number of subcarriers of 26.
  • the basic HE-LTF sequence is a subsequence of length 26, for the 2x mode, since the HE-LTF sequence number corresponds to the number of 4x HE-LTF numbers divided by 2, the basic HE-LTF sequence in 2x mode Is a subsequence of length 13.
  • the HE-LTF sequences constructed according to the foregoing methods may be separately stored in the AP and STA ends in the WLAN, so as to be directly used in the uplink and downlink transmission mentioned above.
  • a transmitter transmits different HE-LTF sequences according to different bandwidth sizes, RU locations, and RU sizes.
  • AP or STA transmits different HE-LTF sequences according to different bandwidth sizes, RU locations, and RU sizes.
  • the 601 selects one HE-LTF sequence according to the bandwidth, and the one HE-LTF sequence has two forms, which respectively correspond to the 2x and 4x modes in 802.11ax.
  • the HE-LTF in the 2x mode includes: the sub-sequence Ga and the sub-sequence Gb, +1 or -1 at the position of the spare leftover subcarrier; the length of the Ga and Gb is +1 or -1 The sequence of 13.
  • Ga and Gb are:
  • G a ⁇ +1,+1,+1,-1,+1,+1,+1,-1,+1,-1,-1,+1,-1 ⁇
  • G b ⁇ +1,+1,+1,-1,-1,-1,-1,+1,-1,-1,-1,+1,-1 ⁇
  • the HE-LTF in the 2x mode may also include a sequence generated according to Ga and Gb.
  • a sequence generated according to Ga and Gb we will refer to the sequence generated by Ga and Gb as a derivative sequence, including but not limited to:
  • the sequence obtained by inverting the phase at the pilot position of the Ga sequence can be expressed as
  • the sequence obtained by inverting the phase at the pilot position of the Gb sequence can be expressed as
  • the sequence obtained by inverting the phase on the subcarrier of the even sequence of the Ga sequence can be expressed as G c .
  • a sequence obtained by inverting the phase of a value on a subcarrier of an even bit of the Gb sequence can be expressed as G d .
  • a further sequence includes: a sequence obtained by inverting a phase at a pilot position of the G c sequence, which can be expressed as And the sequence obtained by inverting the phase at the pilot position of the G d sequence can be expressed as
  • G c G a ⁇ *G xp
  • G d G b ⁇ *G xp
  • G ap ⁇ +1, +1, -1, +1, +1, +1, +1, +1, +1, +1, +1, -1, +1, +1, +1 ⁇ , meaning that The frequency position (ie, the subcarrier position with the number 3 and 10) is inverted.
  • G bp ⁇ +1,+1,+1,-1,+1,+1,+1,+1,+1,+1,+1,+1,-1,+1,+1 ⁇ , meaning at the pilot position (ie, the serial number is the 4th and 11th subcarrier positions) is inverted.
  • G xp ⁇ +1,-1,+1,-1,+1,-1,+1,-1,+1,-1,+1,-1,+1,-1,+1 ⁇ , meaning in the even position Inverted.
  • the PAPR value after the G a sequence IFFT is equal to the PAPR value after the G c sequence IFFT.
  • G b and its derived sequences are identical to G a and its derived sequences, and have the same properties as described in 1, 2 above.
  • the HELTF in 4x mode includes: sequence Ga, subsequence Gb, and +1 or -1 at the position of the spare leftover subcarrier; the Ga or Gb is a sequence of length 26 consisting of +1 or -1. specific:
  • Ga [+1 +1 +1 +1 +1 +1 +1 +1 +1 +1 -1 +1 +1 -1 -1 +1 -1 +1 +1 - 1 +1 -1];
  • Gb [+1 +1 +1 +1 -1 -1 +1 +1 +1 +1 +1 +1 -1 -1 +1 -1 -1 +1 -1 + 1 -1 +1];
  • the HE-LTF in the 4x mode may also include a sequence generated according to Ga or Gb.
  • a sequence generated according to Ga or Gb we refer to the sequence generated by Ga or Gb as a derived sequence, including but not limited to:
  • the sequence obtained by inverting the phase at the pilot position of the Ga sequence can be recorded as
  • the sequence obtained by inverting the phase at the pilot position of the Gb sequence can be recorded as
  • a sequence obtained by inverting the phase of the value on the subcarrier of the even sequence of the Ga sequence can be referred to as G c .
  • a sequence obtained by inverting the phase of a value on a subcarrier of an even bit of the Gb sequence can be referred to as G d .
  • the sequence obtained by inverting the phase at the pilot position of the G c sequence can be recorded as
  • the sequence obtained by inverting the phase at the pilot position of the G d sequence can be recorded as
  • G c G a ⁇ *G xp
  • G d G b ⁇ *G xp
  • G ap ⁇ 1, 1, 1, 1, 1, 1, -1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,1,1,1 ⁇ means at
  • the pilot position (ie, the subcarriers with the number 6 and 20) is inverted.
  • G xp ⁇ +1,-1,+1,-1,+1,-1,+1,-1,+1,-1,+1,-1,+1-1,+1,-1 , +1, -1, +1, -1, +1, -1, +1, -1, +1, -1, +1, -1 ⁇ means negating the position of the even number.
  • the PAPR value after the G a sequence IFFT is equal to the PAPR value after the G c sequence IFFT.
  • G b and G a sequence derived with the same sequence and its derivatives, having the same properties as described above 1,2.
  • each of the foregoing subsequences and derived sequences may have different expression patterns, for example, the aforementioned G c is replaced by Replace G d with Replace with Replace with Its essence is no different. Alternatively, all of the basic subsequences and the corresponding derived sequences have different expressions, and their nature is not different.
  • the HE-LTF sequence further comprises a combination of different derived sequences for different 2x/4x patterns.
  • Cascade combinations in the 2x mode include, but are not limited to, one or any combination of the following sequences for the Ga, Gb sequences, and the different derived sequences they generate:
  • the cascaded combination in the 4x mode includes, but is not limited to, one or any combination of the following sequences for the Ga, Gb sequences, and the different derived sequences they generate:
  • the above-mentioned cascade combination may also have corresponding different expressions, and the contents thereof are not substantially different.
  • the AP or the STA of the WLAN only the sub-sequence Ga and the sub-sequence Gb may be stored, and when the PPDU needs to be transmitted, the HE-LTF sequence is constructed and then transmitted, or the foregoing HE-LTF sequence may be directly stored. In an AP or STA, it is transmitted on the corresponding subcarrier when needed.
  • the subsequences at corresponding positions of the HE-LTF sequence are placed on the subcarriers corresponding to the position and transmitted.
  • the RU size may be 13, 26, 54, and 121 subcarriers.
  • -122:2:122 refers to a subcarrier of an even position in a subcarrier of sequence number -122 to 122, that is, specifically the sequence number is ⁇ -122, -120, ..., -2
  • the values at the positions of these subcarriers are the elements of the corresponding positions in the above sequence, and the values of the subcarriers at other positions are 0.
  • the above expressions will not be described in the following.
  • the HE-LTF sequence includes Ga and Gb sequences and sequences generated by Ga and Gb sequences.
  • G c (Refer to the previous statement for details), +1 or -1 at the position of the spare leftover subcarrier, and further, may also contain consecutive +G a , Or, continuous +G b , Or, continuous +G c , continuously -G b and so on.
  • G a ⁇ +1,+1,+1,-1,+1,+1,+1,-1,+1,-1,-1,+1,-1 ⁇
  • G b ⁇ +1,+1,+1,-1,-1,-1,-1,+1,-1,-1,-1,+1,-1 ⁇
  • the HE-LTF sequence on the above 2X mode can be directly stored as:
  • FIG. 8a shows the PAPR value of the HE-LTF sequence in the 20 MHz bandwidth. It can be seen from the PAPR value that the PAPR value is still low when the pilot subcarrier and other subcarriers introduce different rotational phases.
  • the first set of PAPR values is the PAPR value corresponding to the 26 subcarrier resource blocks from left to right, wherein the first row of data 2.76, 3.68, 2.76, 3.68... refers to the value of the data position multiplied by +1, the pilot position
  • the value is multiplied by the PAPR value corresponding to the HELTF sequence when +1, which is from left to right 2.76 is the first 26 subcarrier resource block corresponding PAPR value, and the next 3.68 refers to the second 26 subcarrier from left to right.
  • the resource block corresponds to the PAPR value, and so on; the second row data 3.67, 2.76, 3.68, 2.76...
  • the fourth row of data 4.46, 3.30, 4.46, 3.30... means that the value of the data position is multiplied by w 2 , and the value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence, which is sequentially from left to right.
  • the right 4.46 is the PAPR value corresponding to the first 26 subcarrier resource block, and the next 3.30 refers to the PAPR value corresponding to the second 26 subcarrier resource block from left to right, and so on;
  • the second group of PAPR values from left to right, the PAPR value corresponding to the second row 52 subcarrier resource block, wherein the first row data 4.68, 4.68, 4.33, 4.68... means that the value of the data position is multiplied by +1.
  • the value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence at +1, which is from left to right, the first 4.68 is the corresponding 52PR carrier resource block corresponding to the PAPR value, and the second 4.68 refers to the left direction.
  • the second 52 subcarrier resource block of the right corresponds to the PAPR value, and so on;
  • the second row of data 4.68, 4.68, 4.48, 4.68 refers to the value of the data position multiplied by -1, the value of the pilot position is multiplied by +1, the PAPR value corresponding to the HELTF sequence, which is from left to right, first 4.68 is the corresponding 52PR carrier resource block corresponding PAPR value, the second 4.68 refers to the second 52 subcarrier resource block corresponding to the PAPR value from left to right, and so on;
  • the third row of data 4.69, 4.69, 4.35 4.69 means that the value of the data position is multiplied by w, and the value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence, which is from left to right, and the first 4.69 is the first 52 subcarrier resource block.
  • the second 4.69 refers to the PAPR value corresponding to the second 52 subcarrier resource block from left to right, and so on.
  • the fourth row data 4.69, 4.69, 4.77, 4.69 refers to the value of the data position multiplied.
  • the value of w 2 , the location of the pilot is multiplied by the PAPR value corresponding to the HELTF sequence, which is from left to right, the first 4.69 is the corresponding 52PR carrier resource block corresponding to the PAPR value, and the second 4.69 is Refers to the second 52 subcarrier resource block corresponding to the PAPR value from left to right, and so on;
  • the third group of PAPR values is the PAPR value corresponding to the third row 106 subcarrier resource block from left to right, wherein the first row data 4.89 and 3.93 means that the value of the data position is multiplied by +1, and the value of the pilot position is multiplied.
  • the PAPR value corresponding to the HELTF sequence at +1, which is from left to right in sequence, 4.89 is the corresponding PAPR value of the first 106 subcarrier resource block
  • 3.93 refers to the corresponding PAPR value of the second 106 subcarrier resource block from left to right.
  • the second row of data 4.23, 4.76 means that the value of the data position is multiplied by -1, the value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence, which is from left to right, and 4.23 is the first 106.
  • the subcarrier resource block corresponds to the PAPR value
  • 4.76 refers to the PAPR value corresponding to the second 106 subcarrier resource block from left to right
  • the third row data 4.79, 4.73 means that the value of the data position is multiplied by w, and the value of the pilot position is
  • the PAPR value corresponding to the HELTF sequence is multiplied by +1, which is from left to right in sequence
  • 4.79 is the corresponding PAPR value of the first 106 subcarrier resource block
  • 4.73 refers to the second 106 subcarrier resource block corresponding to PAPR from left to right.
  • 4.38,4.87 fourth line of data is the value of the position data are multiplied by w 2, the value of the position of the pilot sequence is multiplied by +1 HELTF
  • PAPR value sequentially from left to right, the first 4.38 106 corresponding to subcarrier resource block PAPR value 4.87 means 106 from left to right a second subcarrier resource block corresponding PAPR value.
  • the fourth group of data 5.31, 5.32, 5.48, 5.46 is the PAPR value corresponding to the fourth row 242 subcarrier resource block, wherein the first 5.31 means that the value of the data position is multiplied by +1, and the value of the pilot position is multiplied by + The PAPR value corresponding to the HELTF sequence at 1 o'clock; the second 5.32 means that the value of the data position is multiplied by -1, the value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence when +1; the third 5.48 refers to the data position.
  • the values are multiplied by w, and the value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence at +1; the first 5.46 means that the value of the data position is multiplied by w 2 , and the value of the pilot position is multiplied by +1.
  • the HE-LTF sequence in the 2x mode includes a Ga sequence and a sequence G c generated by the Ga and Gb sequences, G d , +1 or -1 at the position of the spare leftover subcarrier.
  • the contents of the foregoing sequences refer to the previous embodiments and will not be described again.
  • it also includes a continuous -G c , Or, continuous +G a , (or, as the consecutive -G d listed in the above sequence, Or, continuous +G a , continuously +G d .
  • the HE-LTF sequence in the aforementioned 2x mode can be directly stored as
  • the PAPR value using the above HE-LTF sequence is the same as that shown in Fig. 8a.
  • the HE-LTF sequence includes Ga and Gb sequences and sequences generated by Ga and Gb sequences.
  • G d , +1 or -1 located at the position of the spare leftover subcarrier may also contain a continuous +G a , Or continuous +G d , or continuous -G a , continuous -G b .
  • the specific content of each sequence refers to the foregoing embodiment, and details are not described herein again.
  • the HE-LTF sequence in the aforementioned 2x mode can be directly stored as
  • Figure 8b shows the PAPR value of the HE-LTF sequence in the 20MHz bandwidth. It can be seen from the set of PAPR values that the PAPR value is still low when the pilot subcarrier and other subcarriers introduce different rotational phases.
  • the first group of numbers is the PAPR value corresponding to the 26 subcarrier resource blocks from left to right, wherein the first row of data 2.76, 3.68, 2.76, 3.68... refers to the value of the data position multiplied by +1, the value of the pilot position
  • the PAPR value corresponding to the HELTF sequence is multiplied by +1, which is from left to right 2.76 is the first 26 subcarrier resource block corresponding PAPR value, and the next 3.68 refers to the second 26 subcarrier resources from left to right.
  • the block corresponds to the PAPR value, and so on; the second row of data 3.68, 2.76, 3.68, 2.76...
  • the first 26 subcarrier resource block corresponds to the PAPR value
  • the next 3.30 refers to the PAPR value corresponding to the second 26 subcarrier resource block from left to right, and so on;
  • the second group of numbers is the PAPR value corresponding to the second row 52 subcarrier resource block from left to right, wherein the first row data 4.68, 4.33, 4.68, 4.68 refers to the value of the data position multiplied by +1, the pilot position
  • the values are multiplied by the PAPR value corresponding to the HELTF sequence, which is from left to right.
  • the first 4.68 is the corresponding 52PR carrier resource block corresponding PAPR value
  • the second 4.33 refers to the second from left to right.
  • 52 subcarrier resource blocks correspond to PAPR values, and so on;
  • the second row of data 4.68, 4.48, 4.68, 4.68 means that the value of the data position is multiplied by -1, and the value of the pilot position is multiplied by +1.
  • the PAPR value corresponding to the HELTF sequence is sequentially from left to right, first 4.48 is the corresponding 52PR carrier resource block corresponding PAPR value, the second 4.68 refers to the second 52 subcarrier resource block corresponding to the PAPR value from left to right, and so on;
  • the third row of data 4.69, 4.35, 4.69 4.69 means that the value of the data position is multiplied by w, and the value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence, which is from left to right, and the first 4.69 is the first 52 subcarrier resource block.
  • the second 4.35 refers to the PAPR value corresponding to the second 52 subcarrier resource block from left to right, and so on.
  • the fourth row data 4.69, 4.77, 4.69, 4.69 refers to the value of the data position multiplied by w 2
  • the value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence when +1, which is from left to right
  • the first 4.69 is the corresponding 52PR carrier resource block corresponding PAPR value
  • the second 4.77 refers to The second 52 subcarrier resource block from left to right corresponds to the PAPR value, and so on;
  • the third group of data is the PAPR value corresponding to the third row 106 subcarrier resource block from left to right, wherein the first row data 3.93 and 4.89 means that the value of the data position is multiplied by +1, and the value of the pilot position is multiplied by
  • the second row of data 4.76, 4.23 means that the value of the data position is multiplied by -1, and the value of the pilot position is multiplied by +1.
  • the PAPR value corresponding to the HELTF sequence is sequentially from left to right, and 4.76 is the first 106.
  • the carrier resource block corresponds to the PAPR value
  • 4.23 refers to the PAPR value corresponding to the second 106 subcarrier resource block from left to right
  • the third row data 4.73 and 4.79 means that the value of the data position is multiplied by w, and the value of the pilot position is multiplied.
  • 4.73 is the corresponding PAPR value of the first 106 subcarrier resource block
  • 4.79 refers to the corresponding PAPR value of the second 106 subcarrier resource block from left to right.
  • the fourth row of data 4.87, 4.38 means that the value of the data position is multiplied by w 2 , and the value of the pilot position is multiplied by +1 when the HELTF sequence
  • Corresponding PAPR values which are sequentially from left to right, 4.87 is the corresponding 106-subcarrier resource block corresponding to the PAPR value, and 4.38 refers to the corresponding 106-hop PAPR value from the left to the right of the 106-subcarrier resource block.
  • the fourth group of data 5.31, 5.32, 5.48, 5.46 is the PAPR value corresponding to the fourth row 242 subcarrier resource block, wherein the first 5.31 means that the value of the data position is multiplied by +1, and the value of the pilot position is multiplied by + The PAPR value corresponding to the HELTF sequence at 1 o'clock; the second 5.32 means that the value of the data position is multiplied by -1, the value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence when +1; the third 5.48 refers to the data position.
  • the values are multiplied by w, and the value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence at +1; the first 5.46 means that the value of the data position is multiplied by w 2 , and the value of the pilot position is multiplied by +1.
  • the HE-LTF sequence includes a Gb sequence and a sequence G c generated by the Ga and Gb sequences, G d , +1 or -1 at the position of the spare leftover subcarrier, and further, may also include a continuous -G c , Or continuous +G b , or continuous +G c , continuous +G d .
  • the PAPR value of the above HE-LTF sequence is the same as that shown in FIG. 8b, and will not be described again here.
  • the illustrated RU size may be 26, 52, 106, 242, 484 subcarriers.
  • the HE-LTF sequence includes a Ga and Gb sequence and a sequence G c generated by the Ga and Gb sequences, G d , +1 or -1 at the position of the spare leftover subcarrier, and further, may further include: continuous -G c , Or, continuous -G a , Or, continuous +G a , Or continuous -G c , or continuous +G d , Or continuous -G d , or continuous -G b , or continuous +G b , or continuous -G d .
  • Figure 9 shows the PAPR value of the HE-LTF sequence in the 40MHz bandwidth. It can be seen from the PAPR value that the PAPR value is still low when the pilot subcarrier and other subcarriers introduce different rotational phases.
  • the first group of numbers is the PAPR value corresponding to the 26 subcarrier resource blocks from left to right, wherein the first row of data 2.76, 3.68, 2.76, 3.68... refers to the value of the data position multiplied by +1, the value of the pilot position
  • the PAPR value corresponding to the HELTF sequence is multiplied by +1, which is from left to right 2.76 is the first 26 subcarrier resource block corresponding PAPR value, and the next 3.68 refers to the second 26 subcarrier resources from left to right.
  • the block corresponds to the PAPR value, and so on; the second row of data 3.68, 2.76, 3.68, 2.76...
  • the first 26 subcarrier resource block corresponds to the PAPR value
  • the next 3.30 refers to the PAPR value corresponding to the second 26 subcarrier resource block from left to right, and so on;
  • the second group of numbers is the PAPR value corresponding to the second row 52 subcarrier resource block from left to right, wherein the first row data 4.68, 4.68, 4.34, 4.48... means that the value of the data position is multiplied by +1, pilot The value of the position is multiplied by the PAPR value corresponding to the HELTF sequence when it is +1, which is from left to right, the first 4.68 is the corresponding 52PR carrier resource block corresponding to the PAPR value, and the second 4.68 refers to the left to the right.
  • the second 52 subcarrier resource block corresponds to the PAPR value, and so on; the second row data 4.68, 4.68, 4.48, 4.34...
  • the PAPR value corresponding to the HELTF sequence is from left to right, the first 4.68 is the corresponding 52PR carrier resource block corresponding PAPR value, and the second 4.68 refers to the second 52 subcarrier resource block corresponding from left to right. PAPR value, and so on; third line data 4.69, 4.69, 4.35, 4.77... means that the value of the data position is multiplied by w, and the value of the pilot position is multiplied by +1.
  • the PAPR value corresponding to the HELTF sequence is sequentially Left to right, the first 4.69 is the first 52 subcarrier resource block corresponding to the PAPR value, and the second 4.69 is the second 52 from left to right.
  • the carrier resource block corresponds to the PAPR value, and so on; wherein the fourth row of data 4.69, 4.69, 4.77, 4.35 means that the value of the data position is multiplied by w 2 , and the value of the pilot position is multiplied by +1 when the HELTF sequence corresponds to the PAPR value.
  • the first 4.69 is the corresponding 52PR carrier resource block corresponding to the PAPR value
  • the second 4.69 refers to the second 52 subcarrier resource block corresponding to the PAPR value from left to right, and so on;
  • the third group of data is the PAPR value corresponding to the third row 106 subcarrier resource block from left to right, wherein the first row data 5.42, 4.34, 4.34, 5.42 means that the value of the data position is multiplied by +1, the pilot position The values are multiplied by the PAPR value corresponding to the HELTF sequence when +1, which is from left to right, 5.42 is the corresponding 106PR carrier resource block corresponding PAPR value, and 4.34 refers to the second 106 subcarrier resource block from left to right.
  • the second row of data 4.85, 5.50, 5.50, 4.85 means that the value of the data position is multiplied by -1, and the value of the pilot position is multiplied by the PALTF value corresponding to the HELTF sequence, which in turn From left to right, 4.85 is the PAPR value corresponding to the first 106 subcarrier resource block, 5.50 refers to the corresponding PAPR value of the second 106 subcarrier resource block from left to right, and so on;
  • the third row data is 4.94, 4.63, 4.63, 4.94 means that the value of the data position is multiplied by w, and the value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence when it is +1, which is sequentially from left to right, and 4.94 is the corresponding PAPR value of the first 106 subcarrier resource block.
  • 4.63 refers to the PAPR value corresponding to the second 106 subcarrier resource block from left to right, and so on; the fourth row of data 4.6 8. 5.16, 5.16, 4.68 means that the value of the data position is multiplied by w 2 , and the value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence, which is from left to right, and 4.68 is the first 106.
  • the carrier resource block corresponds to the PAPR value
  • 5.16 refers to the corresponding PAPR value of the second 106 subcarrier resource block from left to right.
  • the fourth group of data is the PAPR value corresponding to the third row 242 subcarrier resource block from left to right, wherein the first row data 5.32 and 5.32 means that the value of the data position is multiplied by +1, and the value of the pilot position is multiplied by The PALTF sequence corresponding to the HELTF sequence, which is from left to right, the first 5.32 is the PAPR value corresponding to the first 242 subcarrier resource block, and the second 5.32 refers to the second 242 subcarrier from left to right.
  • the resource block corresponds to the PAPR value;
  • the second row data 5.37 and 5.37 means that the value of the data position is multiplied by -1, and the value of the pilot position is multiplied by +1, and the PAPR value corresponding to the HELTF sequence is sequentially from left to right.
  • a 5.37 is the first 242 subcarrier resource block corresponding PAPR value
  • the second 5.37 refers to the second 242 subcarrier resource block corresponding to the PAPR value from left to right
  • the third row data 5.50, 5.50 refers to the data position
  • the values are multiplied by w, and the value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence when it is +1, which is from left to right
  • the first 5.50 is the PAPR value corresponding to the first 242 subcarrier resource block
  • the second 5.50 means that the second 242 subcarrier resource block from left to right corresponds to the PAPR value
  • the fourth row data 5.39, 5.39 refers to the value of the data position.
  • PAPR sequence of values corresponding to time HELTF w 2 pilot position values are multiplied by +1 sequentially from left to right, the first 5.39 242 is the first subcarrier resource block corresponding PAPR value is 5.39 second Refers to the second 242 subcarrier resource block from left to right corresponding to the PAPR value;
  • the fifth group of data 6.00, 4.98, 6.15, 5.26 is the PAPR value corresponding to the fourth row 242 subcarrier resource block, wherein the first 6.00 means that the value of the data position is multiplied by +1, and the value of the pilot position is multiplied by + The PAPR value corresponding to the HELTF sequence at 1 o'clock; the second 4.98 means that the value of the data position is multiplied by -1, the value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence when +1; the third 6.15 refers to the data position.
  • the values are multiplied by w, and the value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence at +1; the first 5.26 means that the value of the data position is multiplied by w 2 , and the value of the pilot position is multiplied by +1.
  • the HE-LTF sequence includes a Ga and Gb sequence and a sequence G c generated by the Ga and Gb sequences, G d , +1 or -1 at the position of the spare leftover subcarrier,
  • it may contain continuous +G a , Or, continuous -G c , Or, continuous +G c , Or continuous -G a , or, continuous +G b , Or continuous -G d , or continuous +G d , or continuous +G b .
  • the PAPR value when the above HE-LTF sequence is used is the same as that shown in FIG. 9, and will not be described again.
  • the RU size may be 26, 52, 106, 242, 484, 996 subcarriers.
  • the first 80MHz 2X HE-LTF sequence The first 80MHz 2X HE-LTF sequence:
  • the HE-LTF sequence includes G a and G b sequences and sequences generated by the G a and G b sequences G c , G d , +1 or -1 at the position of the spare leftover subcarrier, further, may also contain consecutive -G a , Or, continuous +G c , +G b , or continuous -G a , or, continuous -G c , or, continuous -G c , Or, continuous -G a , -G d , or continuous -G c , or continuous +G a , continuous +G d , Or, continuous -G b , Or, continuous -G a , -G d , or, continuous -G a , -G d , or continuous -G b , or continuous G b , Or, continuous +G d , Or, continuous -G c , -G b , or continuous +G d .
  • Figure 10 shows the PAPR value of the HE-LTF sequence in the 80MHz bandwidth. It can be seen from the PAPR value that the PAPR value is still low when the pilot subcarrier and other subcarriers introduce different rotational phases.
  • the first group of numbers: from left to right is the PAPR value corresponding to the 26 subcarrier resource blocks, wherein the first row of data 2.76, 3.68, 2.76, 3.68... means that the value of the data position is multiplied by +1, the position of the pilot The value is multiplied by the PAPR value corresponding to the HELTF sequence when +1, which is from left to right 2.76 is the first 26 subcarrier resource block corresponding PAPR value, and the next 3.68 refers to the second 26 subcarrier from left to right.
  • the resource block corresponds to the PAPR value, and so on; the second row of data 3.68, 2.76, 3.68, 2.76...
  • the value of the data position is the value of the data position multiplied by +1, and the value of the pilot position is multiplied by -1 to the PAPR value corresponding to the HELTF sequence. It is from the left to the right 3.68 is the first 26 subcarrier resource block corresponding to the PAPR value, the next 2.76 refers to the second 26 subcarrier resource block corresponding to the PAPR value from left to right, and so on; the third row of data 3.30 4.46, 3.30, 4.46...
  • the value of the data position is multiplied by w, and the value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence, which is the first 26 subcarrier resources from left to right.
  • the block corresponds to the PAPR value
  • the next 4.46 refers to the PAPR value corresponding to the second 26 subcarrier resource block from left to right.
  • Push; 4.46,3.30,4.46,3.30 ?? fourth line data is the value of the position data are multiplied by w 2, are multiplied by the value of PAPR of the pilot the position corresponding to the time sequence of values +1 HELTF, sequentially from left to right 4.46
  • the first 26 subcarrier resource block corresponds to the PAPR value
  • the next 3.30 refers to the PAPR value corresponding to the second 26 subcarrier resource block from left to right, and so on;
  • the second group of numbers is the PAPR value corresponding to the second row 52 subcarrier resource block from left to right, wherein the first row data 4.68, 4.68, 4.69, 4.69... means that the value of the data position is multiplied by +1, pilot The value of the position is multiplied by the PAPR value corresponding to the HELTF sequence when it is +1, which is from left to right, the first 4.68 is the corresponding 52PR carrier resource block corresponding to the PAPR value, and the second 4.68 refers to the left to the right.
  • the second 52 subcarrier resource block corresponds to the PAPR value, and so on; the second row data 4.68, 4.68, 4.69, 4.69...
  • the PAPR value corresponding to the HELTF sequence is from left to right, the first 4.68 is the corresponding 52PR carrier resource block corresponding PAPR value, and the second 4.68 refers to the second 52 subcarrier resource block corresponding from left to right.
  • the value of the data position is multiplied by w
  • the value of the pilot position is multiplied by the PALTF value corresponding to the HELTF sequence, which in turn Left to right
  • the first 4.68 is the first 52 subcarrier resource block corresponding PAPR value
  • the second 4.68 refers to the second 52 from left to right Carrier PAPR value corresponding to the resource blocks, and so on
  • 4.68,4.68,4.69,4.69 wherein the fourth row of data refers to the sequence corresponding to the PAPR value HELTF position value data are multiplied by w 2, pilot position values are multiplied by +1 , which is from left to right in sequence
  • the first 4.68 is the corresponding 52PR carrier resource block corresponding to the PAPR value
  • the second 4.68 refers to the second 52 subcarrier resource block corresponding to the PAPR value from left to right, and so on.
  • the third group of data is the PAPR value corresponding to the third row 106 subcarrier resource block from left to right, wherein the first row data 5.42, 5.33, 5.42, 5.33... refers to the value of the data position multiplied by +1.
  • the value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence in the HELTF sequence when the HELTF sequence is +1, which is from left to right in sequence, 5.42 is the PAPR value corresponding to the first 106 subcarrier resource block, and 5.33 is from left to right.
  • the right second 106 subcarrier resource block corresponds to the PAPR value, and so on; the second row data 4.85, 5.41, 4.85, 5.41...
  • the PAPR value corresponding to the HELTF sequence in the HELTF sequence is from left to right, 4.85 is the PAPR value corresponding to the first 106 subcarrier resource block, and 5.50 refers to the corresponding PAPR value of the second 106 subcarrier resource block from left to right. , and so on; the third row of data 4.95, 5.18, 4.95, 5.18...
  • the PAPR value corresponding to the HELTF sequence is from left to right
  • 4.68 is the PAPR value corresponding to the first 106 subcarrier resource block
  • 4.97 refers to the corresponding PAPR value of the second 106 subcarrier resource block from left to right.
  • the fourth group of data is the PAPR value corresponding to the fourth row 242 subcarrier resource block from left to right, wherein the first row data 5.29 and 5.29 means that the value of the data position is multiplied by +1, and the value of the pilot position is multiplied by The PALTF value corresponding to the HELTF sequence at +1 +1 is from left to right, the first 5.29 is the PAPR value corresponding to the first 242 subcarrier resource block, and the second 5.29 is the second from left to right.
  • the 242 subcarrier resource block corresponds to the PAPR value
  • the second row data 5.58 and 5.58 means that the value of the data position is multiplied by -1, and the value of the pilot position is multiplied by +1, and the PAPR value corresponding to the HELTF sequence in the HELTF sequence is sequentially From left to right
  • the first 5.58 is the PAPR value corresponding to the first 242 subcarrier resource block
  • the second 5.58 refers to the PAPR value corresponding to the second 242 subcarrier resource block from left to right
  • the third row data is 5.40, 5.40 means that the value of the data position is multiplied by w, the value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence, which is sequentially from left to right
  • the first 5.40 is the first 242 subcarrier resource block corresponding to PAPR value
  • the second 5.40 refers to the PAPR value corresponding to the second 242 subcarrier resource block from left to right
  • the fifth group of data is the PAPR value corresponding to the fifth row 484 subcarrier resource block from left to right, wherein the first row data 6.27, 6.13 means that the value of the data position is multiplied by +1, and the value of the pilot position is multiplied by +
  • the PAPR value corresponding to the HELTF sequence at 1 o'clock is from left to right
  • 6.27 is the corresponding PAPR value of the first 484 subcarrier resource block
  • 6.13 refers to the corresponding PAPR value of the second 484 subcarrier resource block from left to right
  • the two rows of data 6.11 and 6.40 mean that the values of the data positions are multiplied by -1, and the values of the pilot positions are multiplied by +1.
  • the PAPR values corresponding to the HELTF sequence in the HELTF sequence are sequentially left to right, and 6.11 is the first
  • the 242 subcarrier resource block corresponds to the PAPR value
  • 6.40 refers to the PAPR value corresponding to the second 484 subcarrier resource block from left to right
  • the third row data 6.24, 6.34 refers to the value of the data position multiplied by w, the value of the pilot position.
  • the PAPR value corresponding to the HELTF sequence is multiplied by +1, which is from left to right in sequence
  • 6.24 is the corresponding PAPR value of the first 484 subcarrier resource block
  • 6.34 refers to the second 484 subcarrier resource block corresponding from left to right.
  • PAPR value; the fourth row data 6.29, 6.25 means that the value of the data position is multiplied by w 2 , and the value of the pilot position is multiplied by +1.
  • the PAPR value corresponding to the HELTF sequence is from left to right in sequence, 6.29 is the corresponding PAPR value of the first 484 subcarrier resource block, and 6.25 refers to the corresponding PAPR value of the second 484 subcarrier resource block from left to right;
  • the sixth group of data 6.01, 5.68, 6.08, 5.92 is the PAPR value corresponding to the sixth row 996 subcarrier resource block, wherein the first 6.08 means that the value of the data position is multiplied by +1, and the value of the pilot position is multiplied by + The PAPR value corresponding to the HELTF sequence at 1 o'clock; the second 5.68 means that the value of the data position is multiplied by -1, the value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence when +1; the third 6.08 refers to the data position.
  • the values are multiplied by w, the value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence at +1; the fourth 5.92 is that the value of the data position is multiplied by w 2 , and the value of the pilot position is multiplied by +1.
  • the HE-LTF sequence includes G a and G b sequences and sequences generated by the G a and G b sequences G c , G d , Located at +1 or -1 at the position of the spare leftover subcarrier, further, may also contain consecutive +G c , Or, continuous +G a , +G d , or continuous +G c , or continuous -G a , or, continuous -G a , Or, continuous +G c , +G b , or continuous -G a , or, continuous -G c , continuous -G b , Or, continuous -G d , Or, continuous +G c , +G b , or continuous -G d , or continuous +G d , Or, continuous -G b , Or, continuous -G a , -G d , or continuous +G d , Or, continuous -G b , Or, continuous -G a ,
  • the corresponding PAPR value is the same as the PAPR value of the first HELTF sequence (shown in Figure 10).
  • the HE-LTF sequence includes G a and G b sequences and sequences generated by the G a and G b sequences G c , G d , +1 or -1 at the position of the spare leftover subcarrier, further, may also include a continuous -G a , Or, continuous +G c , +G b , or continuous -G a , or, continuous -G c , or continuous +G c , Or, continuous +G a , +G d , or continuous +G c , or continuous -G a , continuous -G d , Or, continuous +G b , Or, continuous +G a , Or, continuous +G a , +G d , or continuous +G b , or continuous +G b , Or, continuous +G d , Or, continuous -G c , -G b , or continuous +G d .
  • Figure 11 shows the PAPR value of the HE-LTF sequence in the 80MHz bandwidth. It can be seen from the PAPR value that the PAPR value is still low when the pilot subcarrier and other subcarriers introduce different rotational phases.
  • the first group of numbers: from left to right is the PAPR value corresponding to the 26 subcarrier resource blocks, wherein the first row of data 2.76, 3.68, 2.76, 3.68... means that the value of the data position is multiplied by +1, the position of the pilot The value is multiplied by the PAPR value corresponding to the HELTF sequence when +1, which is from left to right 2.76 is the first 26 subcarrier resource block corresponding PAPR value, and the next 3.68 refers to the second 26 subcarrier from left to right.
  • the resource block corresponds to the PAPR value, and so on; the second row of data 3.68, 2.76, 3.68, 2.76...
  • the value of the data position is the value of the data position multiplied by +1, and the value of the pilot position is multiplied by -1 to the PAPR value corresponding to the HELTF sequence. It is from the left to the right 3.68 is the first 26 subcarrier resource block corresponding to the PAPR value, the next 2.76 refers to the second 26 subcarrier resource block corresponding to the PAPR value from left to right, and so on; the third row of data 3.30 4.46, 3.30, 4.46...
  • the value of the data position is multiplied by w, and the value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence, which is the first 26 subcarrier resources from left to right.
  • the block corresponds to the PAPR value
  • the next 4.46 refers to the PAPR value corresponding to the second 26 subcarrier resource block from left to right.
  • Push; 4.46,3.30,4.46,3.30 ?? fourth line data is the value of the position data are multiplied by w 2, are multiplied by the value of PAPR of the pilot the position corresponding to the time sequence of values +1 HELTF, sequentially from left to right 4.46
  • the first 26 subcarrier resource block corresponds to the PAPR value
  • the next 3.30 refers to the PAPR value corresponding to the second 26 subcarrier resource block from left to right, and so on;
  • the second group of numbers: from left to right is the PAPR value corresponding to the second row 52 subcarrier resource block, wherein the first row of data 4.68, 4.68, 4.69, 4.69, ... means that the value of the data position is multiplied by +1.
  • the value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence at +1, which is from left to right, the first 4.68 is the corresponding 52PR carrier resource block corresponding to the PAPR value, and the second 4.68 refers to the left direction.
  • the second 52 subcarrier resource block corresponds to the PAPR value, and so on; the second row data 4.68, 4.68, 4.69, 4.69...
  • the PAPR value corresponding to the HELTF sequence is from left to right, the first 4.68 is the corresponding 52PR carrier resource block corresponding PAPR value, and the second 4.68 refers to the second 52 subcarrier resource block from left to right.
  • the value of the data position is multiplied by w, and the value of the pilot position is multiplied by the PALTF value corresponding to the HELTF sequence, which in turn From left to right, the first 4.68 is the first 52 subcarrier resource block corresponding to the PAPR value, and the second 4.68 refers to the second 52 from left to right.
  • the subcarrier resource block corresponds to the PAPR value, and so on; wherein the fourth row data 4.68, 4.68, 4.69, 4.69 refers to the value of the data position multiplied by w 2 , and the value of the pilot position is multiplied by +1 when the HELTF sequence corresponds to the PAPR
  • the third group of data from left to right is the PAPR value corresponding to the third row 106 subcarrier resource block, wherein the first row data 5.42, 5.33, 5.42, 5.33... refers to the value of the data position multiplied by +1.
  • the value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence in the HELTF sequence when the HELTF sequence is +1, which is from left to right in sequence, 5.42 is the PAPR value corresponding to the first 106 subcarrier resource block, and 5.33 is from the left.
  • the second 106 subcarrier resource block to the right corresponds to the PAPR value, and so on; the second row data 4.85, 5.41, 4.85, 5.41...
  • the PALTF sequence corresponds to the PAPR value of the HELTF sequence, which is from left to right, 4.85 is the corresponding 106-subcarrier resource block corresponding to the PAPR value, and 5.50 refers to the second 106 subcarrier resource block corresponding to the PAPR from left to right. Value, and so on; third line data 4.95, 5.18, 4.95, 5.18... means that the value of the data position is multiplied by w, and the value of the pilot position is multiplied by +1.
  • the PAPR value corresponding to the HELTF sequence in the HELTF sequence is From left to right, 4.95 is the first 106 subcarrier resource block corresponding to the PAPR value, and 5.18 means from left to right.
  • the two 106 subcarrier resource blocks correspond to the PAPR value, and so on; the fourth row data 4.68, 4.97, 4.68, 4.97...
  • the PAPR value corresponding to the HELTF sequence in the sequence is from left to right, 4.68 is the PAPR value corresponding to the first 106 subcarrier resource block, and 4.97 refers to the corresponding PAPR value of the second 106 subcarrier resource block from left to right.
  • the fourth set of data is the fourth set of data.
  • the PAPR value corresponding to the fourth row 242 subcarrier resource block is sequentially, wherein the first row data 5.29 and 5.29 means that the value of the data position is multiplied by +1, and the value of the pilot position is multiplied by +1 when HELTF
  • the PAPR value corresponding to the HELTF sequence in the sequence is from left to right
  • the first 5.29 is the PAPR value corresponding to the first 242 subcarrier resource block
  • the second 5.29 refers to the second 242 subcarrier resource from left to right.
  • the block corresponds to the PAPR value
  • the second row data 5.58 and 5.58 means that the value of the data position is multiplied by -1, and the value of the pilot position is multiplied by +1.
  • the PAPR value corresponding to the HELTF sequence in the HELTF sequence is sequentially from left to right.
  • the first 5.58 is the PAPR value corresponding to the first 242 subcarrier resource block, and the second 5.58 refers to the corresponding PAPR value of the second 242 subcarrier resource block from left to right;
  • the third row data 5.40, 5.40 refers to data
  • the value of the position is multiplied by w, and the value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence when it is +1, which is sequentially from left to right
  • the first 5.40 is the PAPR value corresponding to the first 242 subcarrier resource block
  • Two 5.40 refers to the PAPR value corresponding to the second 242 subcarrier resource block from left to right;
  • the fourth row data 5.46, 5.46 refers to the data bit.
  • the values are multiplied by w 2 , and the value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence, which is from left to right, and the first 5.46 is the PAPR value corresponding to the first 242 subcarrier resource block.
  • the second 5.46 refers to the PAPR value corresponding to the second 242 subcarrier resource block from left to right;
  • the fifth group of data is the PAPR value corresponding to the fifth row 484 subcarrier resource block from left to right, wherein the first row data 6.13, 6.27 means that the value of the data position is multiplied by +1, and the value of the pilot position is multiplied by +
  • the PAPR value corresponding to the HELTF sequence at 1 o'clock, which is from left to right in sequence, 6.13 is the corresponding PAPR value of the first 484 subcarrier resource block, and 6.27 refers to the corresponding PAPR value of the second 484 subcarrier resource block from left to right;
  • the two rows of data 6.40 and 6.11 mean that the value of the data position is multiplied by -1, and the value of the pilot position is multiplied by +1.
  • the PAPR value corresponding to the HELTF sequence in the HELTF sequence is sequentially from left to right, and 6.40 is the first
  • the 242 subcarrier resource block corresponds to the PAPR value
  • 6.11 refers to the PAPR value corresponding to the second 484 subcarrier resource block from left to right
  • the third row data 6.34, 6.24 refers to the value of the data position multiplied by w, the value of the pilot position.
  • the PAPR value corresponding to the HELTF sequence is multiplied by +1, which is from left to right in sequence
  • 6.34 is the corresponding PAPR value of the first 484 subcarrier resource block
  • 6.24 refers to the second 484 subcarrier resource block corresponding from left to right.
  • PAPR value; the fourth row of data 6.25, 6.29 means that the value of the data position is multiplied by w 2 , and the value of the pilot position is multiplied by +1.
  • the PAPR value corresponding to the HELTF sequence is from left to right in sequence, 6.25 is the corresponding PAPR value of the first 484 subcarrier resource block, and 6.29 refers to the corresponding PAPR value of the second 484 subcarrier resource block from left to right.
  • the sixth group of data 6.01, 5.68, 6.08, 5.92 is the PAPR value corresponding to the sixth row 996 subcarrier resource block, wherein the first 6.08 means that the value of the data position is multiplied by +1, and the value of the pilot position is multiplied by + The PAPR value corresponding to the HELTF sequence at 1 o'clock; the second 5.68 means that the value of the data position is multiplied by -1, the value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence when +1; the third 6.08 refers to the data position.
  • the values are multiplied by w, the value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence at +1; the fourth 5.92 is that the value of the data position is multiplied by w 2 , and the value of the pilot position is multiplied by +1.
  • the HE-LTF sequence includes G a and G b sequences and sequences generated by the G a and G b sequences G c , G d , +1 or -1 at the position of the spare leftover subcarrier, further, may also include a continuous +G c , Or, continuous +G a , +G d , or continuous +G c , or continuous -G a or, continuous +G a Or, continuous -G c , -G b , or continuous +G a , or, continuous +G c , or continuous +G b , Or, continuous +G d , Or, continuous -G c , -G b , or continuous +G d , or, continuous +G d , Or, continuous -G b , Or, continuous -G a , -G d , or continuous -G b .
  • the corresponding PAPR value is the same as the PAPR value of the third HELTF sequence. See Figure 11 for details. It can be seen from the PAPR value of the group that when the pilot subcarrier and other subcarriers are introduced differently. When rotating the phase, the PAPR value is still very low.
  • the RU size shown in FIG. 1a may be 26, 52, 106, 242 subcarriers.
  • the HE-LTF sequence comprising the sequence G e and Ga and Gb generated sequence derived sequences G c, G d , -1 or +1 is located on leftover spare sub-carrier position, further, it may further contain consecutive -G c, Or, continuous +G d , Or, continuous -G c , Continuous +G d ,
  • Figure 12 shows the PAPR value of the HE-LTF sequence in the 20MHz bandwidth. It can be seen from the PAPR value that the PAPR value is still low when the pilot subcarrier and other subcarriers introduce different rotational phases.
  • the first group of numbers: from left to right is the PAPR value corresponding to the 26 subcarrier resource blocks, wherein the first row data 3.51, 3.78, 3.51, 3.78... refers to the value of the data position multiplied by +1, the pilot position
  • the value is multiplied by the PAPR value corresponding to the HELTF sequence when +1, which is from left to right, 3.51 is the corresponding 26PR carrier resource block corresponding PAPR value, and the next 3.78 refers to the second 26 subcarrier from left to right.
  • the resource block corresponds to the PAPR value, and so on; the second row data 3.78, 3.51, 3.78, 3.51...
  • the carrier resource block corresponds to the PAPR value
  • the next 3.48 refers to the PAPR value corresponding to the second 26 subcarrier resource block from left to right.
  • Times on; 3.48,3.28,3.48,3.28 & fourth line data refers PAPR value sequence corresponding to the value of the data position when HELTF are multiplied by w 2, pilot position values are multiplied by +1 sequentially from left to
  • the right 3.48 is the PAPR value corresponding to the first 26 subcarrier resource block
  • the next 3.28 refers to the PAPR value corresponding to the second 26 subcarrier resource block from left to right, and so on;
  • the second group of numbers: from left to right is the PAPR value corresponding to the second row 52 subcarrier resource block, wherein the first row data 4.42, 4.59, 4.63, 4.42 means that the value of the data position is multiplied by +1, the pilot position The values are multiplied by the PAPR value corresponding to the HELTF sequence, which is from left to right.
  • the first 4.42 is the corresponding 52PR carrier resource block corresponding PAPR value, and the second 4.59 refers to the left to right.
  • the two 52 subcarrier resource blocks correspond to the PAPR value, and so on;
  • the second row data 4.42, 4.63, 4.59, 4.42 means that the value of the data position is multiplied by -1, and the value of the pilot position is multiplied by +1 when the HELTF sequence corresponds.
  • the PAPR value is from left to right
  • the first 4.42 is the corresponding 52PR carrier resource block corresponding to the PAPR value
  • the second 4.63 is the second 52 subcarrier resource block corresponding to the PAPR value from left to right.
  • the third row of data 4.44, 4.86, 4.97, 4.42 means that the value of the data position is multiplied by w, and the value of the pilot position is multiplied by +1.
  • the PAPR value corresponding to the HELTF sequence is sequentially from left to right.
  • One 4.44 is the first 52 subcarrier resource block corresponding to the PAPR value
  • the second 4.86 is the second 52 subcarrier resource from left to right.
  • the third group of data from left to right is the PAPR value corresponding to the third row 106 subcarrier resource block, wherein the first row data 4.65, 4.90 means that the value of the data position is multiplied by +1, and the value of the pilot position is multiplied.
  • the second line of data 4.69, 5.01 means that the value of the data position is multiplied by -1, and the value of the pilot position is multiplied by the PAPR value of the HELTF sequence when it is +1, which is from left to right, and 4.69 is the first 106.
  • the subcarrier resource block corresponds to the PAPR value, and 5.01 refers to the PAPR value corresponding to the second 106 subcarrier resource block from left to right;
  • the third row data 4.90 and 4.95 means that the value of the data position is multiplied by w, and the value of the pilot position is
  • the PAPR value corresponding to the HELTF sequence is multiplied by +1, which is from left to right in sequence, 4.90 is the corresponding PAPR value of the first 106 subcarrier resource block, and 4.95 refers to the second 106 subcarrier resource block corresponding to PAPR from left to right.
  • the fourth row of data 4.92, 4.87 means that the value of the data position is multiplied by w 2 , and the value of the pilot position is multiplied by +1 when the HELTF sequence
  • the PAPR value corresponding to the column is from left to right in sequence
  • 4.92 is the PAPR value corresponding to the first 106 subcarrier resource block
  • 4.87 refers to the corresponding PAPR value of the second 106 subcarrier resource block from left to right.
  • the fourth group of data 5.26, 5.30, 5.29, 5.56 is the PAPR value corresponding to the fourth row 242 subcarrier resource block, wherein the first 5.26 means that the value of the data position is multiplied by +1, and the value of the pilot position is multiplied by + The PAPR value corresponding to the HELTF sequence at 1 o'clock; the second 5.30 means that the value of the data position is multiplied by -1, the value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence when +1; the third 5.29 refers to the data position.
  • the values are multiplied by w, and the value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence at +1; the first 5.56 means that the value of the data position is multiplied by w 2 , and the value of the pilot position is multiplied by +1.
  • the HE-LTF sequence comprises a sequence G e, Ga and Gb sequences and derived sequences Ga and Gb generated sequence +1 or -1 at the position of the spare leftover subcarrier. Further, the HE-LTF sequence may further include: continuous +G a , Or, continuous +G b , Or, continuous +G a , Or, continuous +G b , Or +G e (1:13), +G e (14:26).
  • the corresponding PAPR value is the same as the PAPR value of the first HELTF sequence. Referring to FIG. 12, it can be seen that the pilot subcarrier and other subcarriers introduce different rotations. At phase, the PAPR value is still very low.
  • the RU size may be 26, 52, 106, 242, 484 subcarriers as shown in FIG. 1b.
  • the HE-LTF sequence includes a Ga and Gb sequence and a sequence G c generated by the Ga and Gb sequences, G d , +1 or -1 at the position of the spare leftover subcarrier,
  • it may also include a continuous -G a , Or, continuous -G c , Or, continuous +G a , Or continuous +G b , or continuous +G d , or continuous -G b .
  • Figure 13 shows the PAPR value of the HE-LTF sequence in the 40 MHz bandwidth. It can be seen from the PAPR value of the group that the PAPR value is still low when the pilot subcarrier and other subcarriers introduce different rotational phases.
  • the data reading method in the table can refer to the previous implementation manner, and details are not described herein again.
  • the HE-LTF sequence includes a Ga and Gb sequence and a sequence G c generated by the Ga and Gb sequences, G d , +1 or -1 at the position of the spare leftover subcarrier,
  • it may also include a continuous G c , Or, continuous +G a , Or, continuous, -G c , Or continuous +G d , or continuous +G b , or continuous +G b .
  • the corresponding PAPR value is the same as the PAPR value of the first HELTF sequence. Referring to FIG. 13, it can be seen that the pilot subcarrier and other subcarriers introduce different rotations. Phase At the time, the PAPR value is still very low.
  • the 80 MHz bandwidth has 1024 subcarriers.
  • the RU size may be 26, 52, 106, 242, 484, and 996 subcarriers as shown in FIG. 1c.
  • the first 80MHz bandwidth 4x mode HE-LTF sequence is the first 80MHz bandwidth 4x mode HE-LTF sequence:
  • the HE-LTF sequence includes Ge, Ga and Gb sequences and a sequence G c generated by the Ga and Gb sequences, G d , +1 or -1 at the position of the spare leftover subcarrier,
  • it may also include a continuous +G c , Or, continuous +G a , Or, continuous -G c , Or, continuous +G a , Or, continuous -G c , Or, continuous +G a , Or, continuous -G c , Or, continuous -G a , Or, continuous -G d , Or, continuous -G b , Continuous +G d , Or, continuous -G b , Or, continuous +G d , Or, continuous +G b , Alternatively, -G e (1:13), - G e (14:26).
  • Figure 14 shows the PAPR value of the HE-LTF sequence in the 80MHz bandwidth. It can be seen from the PAPR value that the PAPR value is still low when the pilot subcarrier and other subcarriers introduce different rotational phases.
  • the HE-LTF sequence includes Ge, Ga and Gb sequences and a sequence G c generated by the Ga and Gb sequences, G d , +1 or -1 at the position of the spare leftover subcarrier,
  • it may also include a continuous -G a , Or, continuous -G c , Or, continuous +G a , Or, continuous -G c , Or, continuous +G a , Or, continuous +G c , Or, continuous -G b , Continuous -G d , Or, continuous +G b , Or, continuous -G d , Or, continuous +G b , Or, continuous +G d , Or -G e (1:13), - G e (14:26).
  • the corresponding PAPR value is the same as the PAPR value of the first HELTF sequence.
  • the PAPR value of the group can be seen as the pilot subcarrier. When different rotational phases are introduced with other subcarriers, the PAPR value is still very low.
  • the 4x symbol subcarrier design of 160MHz bandwidth can be spliced by two 80MHz bandwidth 4x symbol subcarrier designs.
  • the main 80M band and the auxiliary 80M band can be continuously spliced or separated by a certain bandwidth (for example, 100MHz interval), and the main 80M band and auxiliary 80M.
  • the frequency band can be flexibly adjusted according to the actual situation before and after the frequency band. Therefore, we can define the 4x HE-LTF sequence (LTF 80MHz_prime ) of the main 80M band and the 4x HE-LTF sequence (LTF 80MHz_second ) of the auxiliary 80M band, respectively , and adjust it flexibly according to the interval and band order. Polarity to achieve a lower PAPR.
  • HE-LTF 160MHz [P1*LTF 80MHz_prime , BI, P2*LTF 80MHz_second ]; when the relationship between the two 80M channels is [auxiliary 80M, main 80M]
  • BI refers to the frequency spacing between two 80M channel edge subcarriers.
  • BI zeros(1,23), that is, 23 zeros;
  • zeros(1,23) represents 23 zeros; the remaining undisplayed subcarrier indication numbers (eg: -1024:-1013 and 1013:1023, etc.) The value at the corresponding position defaults to 0.
  • the BI can be adjusted accordingly
  • the HE-LTF sequence on the 996 subcarrier 4X symbol corresponding to the main 80 MHz (LTF 80 MHz_prime ) bandwidth is the first 80 MHz bandwidth 4 ⁇ mode HE-LTF sequence in Embodiment 6, and the main 80 MHz bandwidth 996.
  • the HE-LTF sequence on the subcarrier 4X symbol can be expressed as:
  • LTF 80MHz_prime [ ⁇ 1st-484-RU ⁇ , ⁇ central-26-RU ⁇ , ⁇ 2nd-484-RU ⁇ ]
  • the central-26-RU is expressed as:
  • central-26-RU ⁇ -G e (1:13), +1,0,0,0,0,0,+1,-G e (14:26) ⁇
  • Auxiliary 80MHz (LTF 80MHz_second ) bandwidth 996 subcarrier 4X symbol HE-LTF sequence is composed of 1st-484-RU, 2nd-484-RU and the new central-26-RU (newCentral-26-RU), of which newCentral -26-RU can be expressed as:
  • newCentral-26-RU [+1,+1,+1,-1,-1,-1,+1,+1,-1,-1,-1,-1,+1,0 ,0,0,0,0,0,0,0,-1,-1,-1,+1,-1,+1,+1,+1,+1,-1,+1,+1,-1 ]
  • LTF 80MHz_second can be expressed as follows:
  • LTF 80MHz_second [ ⁇ 1st-484-RU ⁇ , newCentral-26-RU, (-1) * ⁇ 2nd-484-RU ⁇ ];
  • the polarity adjustment coefficients of the main 80MHz bandwidth and the auxiliary 80MHz bandwidth in the two frequency bands and various frequency intervals are shown in the following table, where the primary and secondary channel spacing refers to the center frequency interval of the two 80M bands (interval 80MHz refers to It is a mosaic of two adjacent 80M channels).
  • the corresponding PAPR values in various cases are also shown in the table, where the PAPR value is the maximum value of the phase difference between the data and the pilot.
  • the 2x symbol subcarrier design of 160MHz bandwidth can be spliced by two 80MHz bandwidth 2x symbol subcarrier designs.
  • the main 80M band and the auxiliary 80M band can be continuously spliced or separated by a certain bandwidth (for example, 100MHz interval), and the main 80M band and auxiliary 80M.
  • the frequency band can be flexibly adjusted according to the actual situation before and after the frequency band. Therefore, we can define the 2x HE-LTF sequence (LTF 80MHz_prime ) of the main 80M band and the 2x HE-LTF sequence (LTF 80MHz_second ) of the auxiliary 80M band, respectively , and adjust them flexibly according to the interval and band order as a whole in the 80M sequence. Polarity to achieve a lower PAPR.
  • HE-LTF 160MHz [P1*LTF 80MHz_prime , BI, P2*LTF 80MHz_second ]; when the relationship between the two 80M channels is [auxiliary 80M, main 80M]
  • BI refers to the frequency spacing between two 80M channel edge subcarriers.
  • BI zeros(1,11), that is, 11 zeros
  • the HE-LTF 160MHz sequence can be expressed as:
  • zeros(1,11) represents 11 zeros; the remaining undisplayed subcarrier indication numbers (eg: -1024: -1013, 1013:1023, and -1011:2:1011, etc.) have default values of 0. .
  • the BI can be adjusted accordingly
  • the HE-LTF sequence on the 2X symbol corresponding to the main 80 MHz (LTF 80 MHz_prime ) bandwidth is the second 80 MHz 2X HE-LTF sequence in Embodiment 3, and the HE in the main 80 MHz bandwidth 2X symbol.
  • the LTF sequence can be expressed as:
  • LTF 80MHz_prime [ ⁇ 1st-484-RU ⁇ , ⁇ central-26-RU ⁇ , ⁇ 2nd-484-RU ⁇ ]
  • the central-26-RU is expressed as:
  • central-26-RU ⁇ +1,-1,-1,-1,+1,+1,0,0,0,+1,-1,-1,+1,+1,- 1,+1 ⁇
  • the HE-LTF sequence on the 2X symbol of the auxiliary 80MHz (LTF 80MHz_second ) bandwidth is composed of 1st-484-RU, 2nd-484-RU, and new central-26-RU (newCentral-26-RU), of which newCentral-26- RU can be expressed as:
  • newCentral-26-RU [-1,-1,+1,-1,-1,-1,0,0,0,+1,+1,-1,-1,-1,+ 1,-1]
  • LTF 80MHz_second can be expressed as follows:
  • LTF 80MHz_second [ ⁇ 1st-484-RU ⁇ , newCentral-26-RU, (-1) * ⁇ 2nd-484-RU ⁇ ];

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Abstract

Des modes de réalisation de la présente invention concernent une pluralité de séquences de long champ d'apprentissage (LTF) conformes à la norme 802.11ax dans un réseau local sans fil.
PCT/CN2016/096973 2015-08-26 2016-08-26 Procédé et appareil de transmission de séquence he-ltf Ceased WO2017032343A1 (fr)

Priority Applications (21)

Application Number Priority Date Filing Date Title
EP19189060.7A EP3657749B1 (fr) 2015-08-26 2016-08-26 Procédé de transmission de séquence he-ltf et appareil
MYPI2018700567A MY201594A (en) 2015-08-26 2016-08-26 Method for transmitting he-ltf sequence and apparatus
EP16838601.9A EP3334112B1 (fr) 2015-08-26 2016-08-26 Procédé et appareil de transmission de séquence he-ltf
AU2016312080A AU2016312080B2 (en) 2015-08-26 2016-08-26 Method for transmitting HE-LTF sequence and apparatus
MX2018002300A MX383648B (es) 2015-08-26 2016-08-26 Método para transmitir secuencia de campo de entrenamiento largo de alta eficiencia (he - ltf) y aparato.
JP2018510392A JP6463552B2 (ja) 2015-08-26 2016-08-26 Ｈｅ−ｌｔｆシーケンスを送信するための方法および装置
KR1020187006056A KR102028661B1 (ko) 2015-08-26 2016-08-26 Ｈｅ-ｌｔｆ 시퀀스를 전송하는 방법 및 장치
EP25184864.4A EP4645788A2 (fr) 2015-08-26 2016-08-26 Procédé de transmission de séquence he-ltf et appareil
EP21165745.7A EP3937445B1 (fr) 2015-08-26 2016-08-26 Procédé de transmission de séquence he-ltf et appareil
PL16838601T PL3334112T3 (pl) 2015-08-26 2016-08-26 Sposób i urządzenie do przesyłania sekwencji he-ltf
SG11201801055TA SG11201801055TA (en) 2015-08-26 2016-08-26 Method for transmitting he-ltf sequence and apparatus
ES16838601T ES2790383T3 (es) 2015-08-26 2016-08-26 Método y aparato para transmitir una secuencia de HE-LTF
CA2995892A CA2995892C (fr) 2015-08-26 2016-08-26 Methode de transmission de sequence he-ltf et appareil
EP23172732.2A EP4280554A3 (fr) 2015-08-26 2016-08-26 Procédé de transmission de séquence he-ltf et appareil
ZA201800863A ZA201800863B (en) 2015-08-26 2018-02-09 Method and apparatus for transmitting he-ltf sequence
US15/905,567 US10645687B2 (en) 2015-08-26 2018-02-26 Method for transmitting HE-LTF sequence and apparatus
US16/355,385 US10616882B2 (en) 2015-08-26 2019-03-15 Method for transmitting HE-LTF sequence and apparatus
US16/694,695 US11265873B2 (en) 2015-08-26 2019-11-25 Method for transmitting HE-LTF sequence and apparatus
US17/683,103 US11843493B2 (en) 2015-08-26 2022-02-28 Method for transmitting HE-LTF sequence and apparatus
US18/512,013 US20240205064A1 (en) 2015-08-26 2023-11-16 Method for transmitting he-ltf sequence and apparatus
US19/030,207 US20250260608A1 (en) 2015-08-26 2025-01-17 Method for transmitting he-ltf sequence and apparatus

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