[go: up one dir, main page]

WO2024189797A1 - Système de relais radio, dispositif de relais radio, procédé de relais radio et programme de relais radio - Google Patents

Système de relais radio, dispositif de relais radio, procédé de relais radio et programme de relais radio Download PDF

Info

Publication number
WO2024189797A1
WO2024189797A1 PCT/JP2023/009942 JP2023009942W WO2024189797A1 WO 2024189797 A1 WO2024189797 A1 WO 2024189797A1 JP 2023009942 W JP2023009942 W JP 2023009942W WO 2024189797 A1 WO2024189797 A1 WO 2024189797A1
Authority
WO
WIPO (PCT)
Prior art keywords
modulation
transmitting
polarization
demodulation
transmitting device
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.)
Pending
Application number
PCT/JP2023/009942
Other languages
English (en)
Japanese (ja)
Inventor
一夫 大坂
利文 宮城
武 鬼沢
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NTT Inc
Original Assignee
Nippon Telegraph and Telephone Corp
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
Application filed by Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP2025506332A priority Critical patent/JPWO2024189797A1/ja
Priority to PCT/JP2023/009942 priority patent/WO2024189797A1/fr
Publication of WO2024189797A1 publication Critical patent/WO2024189797A1/fr
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes

Definitions

  • This disclosure relates to a wireless relay system, a wireless relay device, a wireless relay method, and a wireless relay program, and in particular to a wireless relay system, a wireless relay device, a wireless relay method, and a wireless relay program that are suitable for reducing the effects of quality degradation due to fading.
  • a method of relaying wireless signals uses multiple frequency channels to transmit large volumes of data.
  • wireless signals When wireless signals are propagated over long distances, or in environments where the propagation path of the wireless signals is over the ocean, the wireless signals may be affected by fading during the propagation process, causing significant degradation of the transmission characteristics.
  • SD Space Diversity
  • FIG. 1 is a diagram for explaining the outline of a wireless relay system using SD reception.
  • the system shown in FIG. 1 includes a transmitting device 10.
  • the transmitting device 10 includes a transmitting antenna 12.
  • FIG. 1 shows an example in which the transmitting device 10 transmits wireless signals using four channels #1 to #4.
  • all four channels #1 to #4 use the 64QAM (Quadrature Amplitude Modulation) modulation method to transmit radio signals using vertical polarization (hereinafter referred to as "V polarization").
  • V polarization vertical polarization
  • the receiving device 14 is installed at a location far away from the transmitting device 10.
  • the receiving device 14 is equipped with multiple antennas installed at different heights, in this example, three antennas 16, 18, and 20.
  • the antennas 16, 18, and 20 are typically composed of parabolic antennas with an aperture of 3 m to 4 m.
  • the effects of fading change depending on the state of the propagation path of the radio signal. For example, due to weather conditions, etc., conditions may be good around antenna 16, which is installed at the highest position, but conditions may be unsuitable for wireless communication around antenna 20, which is installed at the lowest position. Similarly, the opposite situation may occur depending on weather conditions, etc.
  • the receiving antennas 16, 18, 20 are installed at different heights, even if one of the antennas is affected by fading, the other antennas may be able to receive the radio signal well. For this reason, when the system shown in Figure 1 detects the effects of fading on any of the four channels #1 to #4, it switches the antenna that receives the signal of that channel to the antenna with the best conditions.
  • Figure 1 shows an example in which the antennas receiving the signals of channels #2 and #3 are switched when these channels are affected by fading. As a result, as shown in Figure 1, a rate of 400 Mbps is maintained for all channels #1 to #4 even after the effects of fading have occurred. In this way, SD reception technology can provide excellent resistance to fading.
  • the first objective of this disclosure is to provide a wireless relay system that achieves excellent resistance to fading without imposing a significant installation burden in order to solve the above problems.
  • the second objective of this disclosure is to provide a wireless relay device that achieves excellent resistance to fading without imposing a significant installation burden.
  • the third objective of this disclosure is to provide a wireless relay method that achieves excellent resistance to fading without imposing a significant installation burden.
  • the fourth objective of this disclosure is to provide a wireless relay program that achieves excellent resistance to fading without imposing a significant installation burden.
  • a first aspect is a wireless relay system including a transmitting device that transmits a wireless signal and a receiving device that receives the wireless signal from the transmitting device,
  • the transmitting device includes: Equipped with a transmitting antenna that supports both front and back polarization, a first modulation process for transmitting a modulated signal with a first multi-level number in the front polarization; A second modulation process of transmitting a modulated signal with a second multi-level number that is smaller than the first multi-level number by using both the front polarization and the back polarization; a process of switching from the first modulation process to the second modulation process in response to a switching request from the receiving device; and a process of returning the second modulation process to the first modulation process in response to a return request from the receiving device,
  • the receiving device includes: a receiving antenna corresponding to the front polarized wave and the back polarized wave, a first demodulation process for demodulating a modulated signal by the first multi-level number transmitted
  • a third aspect is a wireless relay device that transmits a wireless signal to be relayed to a receiving device, comprising: Equipped with a transmitting antenna that supports both front and back polarization, a first modulation process for transmitting a modulated signal with a first multi-level number in the front polarization; A second modulation process of transmitting a modulated signal with a second multi-level number that is smaller than the first multi-level number by using both the front polarization and the back polarization; a process of switching from the first modulation process to the second modulation process in response to a switching request from the receiving device; It is desirable to configure the modulation device to execute a process of restoring the second modulation process to the first modulation process upon receiving a restoration request from the receiving device.
  • a fourth aspect is a wireless relay method for relaying a wireless signal using a transmitting device and a receiving device that receives a wireless signal from the transmitting device, the method comprising: The transmitting device, performing a first modulation to transmit a modulated signal with a first multilevel number in a front polarization; performing a second modulation for transmitting a modulated signal with a second multi-level number that is smaller than the first multi-level number by using both the front polarized wave and the back polarized wave; switching the first modulation to the second modulation in response to a switching request from the receiving device; restoring the second modulation to the first modulation upon receiving a restoration request from the receiving device; The receiving device, performing a first demodulation for demodulating a modulated signal by the first multilevel number transmitted by the front polarization; performing a second demodulation to demodulate the modulated signal by the second multi-level number transmitted by using both the front polarization and the back polarization; when an influence of fading exceeding a judgment
  • a fifth aspect is a wireless relay program for relaying a wireless signal received from a transmitting device to a receiving device, the program comprising:
  • the receiving device includes: A receiving antenna that supports front and back polarization; a processor;
  • the processor a first demodulation process for demodulating a modulated signal having a first multilevel number transmitted by the front polarization;
  • a second demodulation process for demodulating a modulated signal transmitted using both the front polarization and the back polarization, the modulated signal being modulated by a second multi-level number that is smaller than the first multi-level number;
  • a process of requesting the transmitting device to switch a first modulation process for transmitting a modulated signal with the first multi-level number in the front polarization to a second modulation process for transmitting a modulated signal with the second multi-level number in both the front polarization and the back polarization when an influence of fading exceeding a judgment criterion is found in the wireless signal received from the transmitting device,
  • a sixth aspect is a wireless relay program for causing a transmitting device to transmit a wireless signal to be relayed toward a receiving device, the program comprising:
  • the transmitting device includes: A transmitting antenna corresponding to front and back polarization; a processor;
  • the processor a first modulation process for transmitting a modulated signal with a first multi-level number in the front polarization;
  • the computer readable program be capable of executing the above-mentioned method.
  • FIG. 1 is a diagram for explaining an overview of a wireless relay system using SD reception.
  • FIG. 1 is a diagram for explaining an overview of a wireless relay system according to a first embodiment of the present disclosure.
  • FIG. 3 is a block diagram for explaining the configurations of the transmitting device and the receiving device shown in FIG. 2 .
  • a first configuration example regarding the installation of the transmitting device and the receiving device shown in FIG. 3 will be described.
  • a second configuration example regarding the installation of the transmitting device and the receiving device shown in FIG. 3 will be described.
  • 1 is a flowchart for explaining the flow of a series of processes performed by a receiving device in the first embodiment of the present disclosure.
  • 1 is a flowchart for explaining the flow of a series of processes performed by a transmitting device in the first embodiment of the present disclosure.
  • FIG. 2 is a diagram for explaining an overview of a wireless relay system according to the first embodiment of the present disclosure.
  • the system according to the present embodiment includes a transmitting device 30.
  • the transmitting device 30 includes a transmitting antenna 32.
  • Fig. 2 shows an example in which the transmitting device 30 transmits wireless signals using four channels #1 to #4.
  • Transmitting device 30 can use the 64QAM modulation method for each of the four channels #1 to #4.
  • V-polarized radio signals can be transmitted using channels #1 to #4.
  • the transmitting device 30 can transmit radio signals in parallel using both V polarization and its reverse polarization, i.e., horizontal polarization (hereinafter referred to as "H polarization”), which is a polarization orthogonal to the V polarization.
  • V polarization and its reverse polarization, i.e., horizontal polarization (hereinafter referred to as "H polarization”), which is a polarization orthogonal to the V polarization.
  • the required C/N Carrier to Noise
  • BER bit error rate
  • the transmitting device 30 of this embodiment transmits signals modulated with 64QAM in V polarization in all of channels #1 to #4.
  • this method is referred to as “64QAM-V modulation.”
  • the modulation method is switched to 16QAM in that channel, and transmission using both V polarization and H polarization begins.
  • this method is referred to as "16QAM-VH modulation.”
  • Figure 2 shows an example in which the effects of fading were observed in channel #2 and channel #3, and the transmission method for those channels was switched from 64QAM-V modulation to 16QAM-VH modulation. This switch increases the fading resistance of channels #2 and #3 by 5 dB, thereby reducing the effects of degradation due to fading.
  • the system of this embodiment includes a receiving device 34.
  • the receiving device 34 is installed at a location far away from the transmitting device 10.
  • the receiving device 14 includes an antenna 36.
  • the antenna 36 has the function of receiving both V-polarized waves and H-polarized waves.
  • the receiving device 34 analyzes the radio signals received by the antenna 36 and determines whether or not quality degradation due to fading has occurred for each of channels #1 to #4. If the result shows that there is no effect of fading for any of the channels, the receiving device 34 demodulates the received signals for all of channels #1 to #4 using a method compatible with 64QAM-V modulation. Hereinafter, this demodulation will be referred to as "64QAM-V demodulation.”
  • processing is performed to change the modulation method and transmission polarization for that channel. Specifically, information about the channel for which the effects of fading have been found is notified to the transmitting device 30, and at the same time, the radio signal decoding method is changed from 64QAM-V demodulation to a demodulation method compatible with 16QAM-VH modulation.
  • this demodulation is referred to as "16QAM-VH demodulation.”
  • the transmitting device 30 switches from the 64QAM-V modulation method to the 16QAM-VH modulation method. This allows the transmission method of the transmitting device 30 and the demodulation method of the receiving device 34 to be switched at a synchronized timing.
  • the receiving device 34 monitors the communication quality of the channel for which the demodulation method has been switched. Then, when the conditions for transmission and reception in 64QAM are restored, it sends a request to the transmitting device 30 to resume. At the same time, it reverts the radio signal decoding method from 16QAM-VH demodulation to 64QAM-V demodulation.
  • the transmitting device 30 In response to the reversion request, the transmitting device 30 reverts from the 16QAM-VH modulation method to the 64QAM-V modulation method. This allows the transmitting device 30 and the receiving device 34 to revert to the transmission method and demodulation method at synchronized timing.
  • Fig. 3 is a block diagram for explaining the configuration of the transmitting device 30 and the receiving device 34.
  • the transmitting device 30 includes a user interface (I/F) unit 40 that receives a user signal to be relayed.
  • the user I/F unit 40 performs processing for managing a connection with a transmission source of the user signal, etc.
  • the user I/F unit 40 provides the received user signal to the framing unit 42.
  • the framing unit 42 performs processes such as buffering, bit division, mapping, and packetization of the user signal.
  • the packets generated by the framing unit 42 are provided to the MOD unit 44.
  • the MOD unit 44 performs data modulation processing using a specified modulation method, as well as processing to change the modulation method to be used.
  • the MOD unit 44 also has a function for transmitting modulated data using V polarization and a function for transmitting using H polarization.
  • the modulation methods used by the MOD unit 44 are a 64QAM method and a 16QAM method. Specifically, the MOD unit 44 selectively executes processing corresponding to the above 64QAM-V modulation and processing corresponding to the above 16QAM-VH modulation.
  • the modulated data generated by the MOD unit 44 is provided to the RF unit 46.
  • the RF unit 46 performs transmit AMP (amplification) processing, filter processing, monitoring processing, etc.
  • the RF unit 46 also has a function compatible with V polarization and a function compatible with H polarization.
  • the transmit AMP and other processing is realized by the function compatible with V polarization.
  • the 16QAM-VH modulation method is used, the above processing is realized by both the function compatible with V polarization and the function compatible with H polarization.
  • the signal generated by the RF unit 46 is transmitted in the form of a wireless signal via the antenna 32. In this embodiment, this signal is transmitted on four channels #1 to #4 as described above.
  • the RF unit 46 also has a function compatible with V polarization and a function compatible with H polarization.
  • the transmitting device 30 further includes a monitoring control unit 48.
  • the monitoring control unit 48 transmits and receives control signals between the framing unit 42, the MOD unit 44, and the RF unit 46.
  • the monitoring control unit 48 also receives alarm signals from the MOD unit 44 and the RF unit 46.
  • the monitoring control unit 48 uses the above control signals to provide commands to each unit regarding switching between 64QAM-V demodulation and 16QAM-VH demodulation.
  • the receiving device 34 receives wireless signals transmitted on the four channels #1 to #4 via the antenna 36.
  • the signals received by the antenna 36 are provided to the RF unit 50.
  • the RF section 50 performs reception AMP (amplification) processing, AGC processing, C/N monitoring processing, etc. Specifically, the C/N monitoring processing monitors whether the C/N for each of channels #1 to #4 is equal to or greater than the required value of 26 dB for 64QAM.
  • the RF section 50 has a function to handle V polarization and a function to handle H polarization.
  • the RF unit 50 provides the received signal to the MOD unit 52.
  • the MOD unit 52 demodulates the data using a pre-specified method, changes the demodulation method, and monitors the BER.
  • the MOD unit 52 also has a function compatible with V polarization and a function compatible with H polarization.
  • the transmitting device 30 uses 64QAM-V modulation
  • the MOD unit 52 uses the function compatible with V polarization to perform the above processing using the 64QAM-V demodulation method.
  • the transmitting device 30 uses 16QAM-VH modulation
  • the MOD unit 52 uses both the function compatible with V polarization and the function compatible with H polarization to perform the above processing using the 16QAM-VH demodulation method.
  • the signal demodulated by the MOD unit 52 is provided to the deframing unit 54.
  • the deframing unit 54 processes the signal, such as buffering, bit combining, and demapping.
  • the signal processed by the deframing unit 54 is transmitted as a user signal to the destination device via the user I/F unit 56.
  • the receiving device 34 further includes a monitoring control unit 58.
  • the monitoring control unit 58 transmits and receives control signals between the RF unit 50, the MOD unit 52, and the deframing unit 54.
  • the monitoring control unit 58 also receives alarm signals from the RF unit 50 and the MOD unit 52.
  • the MOD unit 52 provides an alarm to the monitoring control unit 58 to notify the situation.
  • the monitoring control unit 58 issues a command to switch the demodulation method from 64QAM-V demodulation to 16QAM-VH demodulation by using a control signal directed to the RF unit 50, MOD unit 52, and deframing unit 54.
  • the monitoring control unit 48 of the transmitting device 30 requesting a switch from 64QAM-V modulation to 16QAM-VH modulation. This allows simultaneous switching of the modulation method and demodulation method in the transmitting device 30 and the receiving device 34.
  • the RF section 50 of the receiving device 34 notifies the monitoring and control section 58 of the situation when the required C/N for 64QAM, that is, a C/N of 26 dB, is recovered.
  • the monitoring and control section 58 issues a command to return the demodulation method from 16QAM-VH demodulation to 64QAM-V demodulation by means of a control signal directed to the RF section 50, MOD section 52, and deframing section 54.
  • it transmits a control signal to the monitoring and control section 48 of the transmitting device 30, requesting a return from 16QAM-VH modulation to 64QAM-V modulation. This allows the transmitting device 30 and the receiving device 34 to simultaneously return to the modulation and demodulation methods.
  • Transmitting device 30 and receiving device 34 each include a computer system along with dedicated hardware. These computer systems include a processor such as a CPU, and a memory device that stores the programs executed by the processor. The functions of transmitting device 30 described above are achieved by the processor included in transmitting device 30 executing the programs stored in transmitting device 30. Similarly, the functions of receiving device 34 described above are achieved by the processor included in receiving device 34 executing the programs stored in receiving device 34.
  • FIG. 4 shows a first example of the configuration regarding the installation of the transmitting device 30 and the receiving device 34.
  • both the transmitting device 30 and the receiving device 34 are fixedly installed. Therefore, as shown in FIG. 4, the control signal to be exchanged between the transmitting device 30 and the receiving device 34 may be transmitted via a wired path 60 that has been installed in advance.
  • FIG. 5 shows a second example configuration regarding the installation of the transmitting device 30 and the receiving device 34.
  • a transmitting/receiving antenna 62 and a receiving device 64 are installed on the transmitting device 30 side.
  • a transmitting/receiving antenna 66 and a transmitting device 68 are installed on the receiving device 34 side.
  • the control signal transmitted from the receiving device 34 to the transmitting device 30 is transmitted and received as a wireless signal, similar to the traffic line. As the data volume of the control signal is limited, it is possible to transmit it over a wireless channel with a narrower bandwidth than the traffic line.
  • Fig. 6 is a flow chart for explaining the flow of a series of processes performed by the receiving device 34 in this embodiment.
  • the routine shown in Fig. 6 is assumed to be started for each channel.
  • this routine is assumed to be started under a condition where the BER is normal, that is, under a condition where 64QAN-V demodulation is used as the demodulation method.
  • the C/N ratio of the channel is obtained by the function of the RF unit 50 (step 100).
  • the BER of the channel is detected by the function of the MOD unit 52. Then, it is determined whether the detected BER has deteriorated to a value that does not satisfy the desired communication quality (step 102).
  • BER degradation is determined by performing error bit detection using CRC bits on a wireless carrier basis.
  • the BER is calculated assuming that the wireless signal contains random bit errors and that all bit errors are detected as CRC errors.
  • the presence or absence of the effects of fading is determined by focusing on quality degradation due to BER, rather than quality degradation due to C/N. This makes it possible to detect degradation of wireless transmission quality, including waveform distortion due to fading.
  • step 104 If no degradation of the BER is found by the processing of step 102, the processing of step 100 above is executed again. As a result, the receiving device 34 continues to perform the 64QAM-V demodulation processing. On the other hand, if degradation of the BER is found, the following two processing operations are performed (step 104).
  • the transmitter 30 is requested to use a front polarized wave as well as a rear polarized wave orthogonal to the front polarized wave, and to change the modulation method to one using a low multi-level number. Specifically, the modulation method is requested to be changed from 64QAM-V to 16QAM-VH.
  • the demodulation method will be changed to one that corresponds to the changed modulation method. Specifically, the demodulation method will be changed from 64QAM-V demodulation to 16QAM-VH demodulation.
  • the modulation and demodulation methods of both the transmitting device 30 and the receiving device 34 are simultaneously switched to those compatible with reverse polarization and low multi-values.
  • resistance to fading is improved without a decrease in transmission rate.
  • the receiving device 34 monitors the C/N of the channel using the function of the RF section 50 (step 106).
  • the C/N is determined whether the newly detected C/N has recovered to a level that can withstand the use of 64QAM, specifically, whether it has recovered to 26 dB or more, which is the required C/N for 64QAM (step 108).
  • the C/N is measured on a wireless carrier basis, and it is determined whether the C/N has recovered.
  • step 106 If the C/N ratio is not recovered by the processing of step 108, the processing of step 106 is repeated. As a result, the receiving device 34 continues to perform the 16QAM-VH demodulation processing.
  • step 110 the following two processes are carried out (step 110).
  • the transmitting device 30 is requested to transmit a high-order modulation signal in front polarization. Specifically, a return from 16QAM-VH modulation to 64QAM-V modulation is requested.
  • the demodulation method will be changed to a method that corresponds to the modulation method after the return to normal operation. Specifically, the demodulation method will be changed from 16QAM-VH demodulation to 64QAM-V demodulation.
  • the receiving device 34 Since the C/N ratio has been restored, after the modulation strategy and demodulation method are restored, a good BER can be maintained by transmitting and receiving a high multi-level modulated signal with front polarization. After that, the receiving device 34 repeatedly executes the processes from step 100 onwards.
  • FIG. 7 is a flowchart for explaining the flow of a series of processes performed by the transmitting device 30 in this embodiment.
  • the routine shown in Fig. 7 is assumed to be started under normal BER conditions for each channel, similar to the routine shown in Fig. 6.
  • a method for transmitting a high-level modulation signal using front polarization is set. Specifically, the 64QAM-V modulation method is set (step 120).
  • step 122 it is determined whether or not a change in the modulation method has been requested from the receiving device 34 (step 122). If a change in the modulation method has not been requested, the processing of step 100 above is repeated. As a result, the transmitting device 30 continues to process 64QAM-V modulation.
  • the modulation method is changed to one that uses both the front and back polarizations and uses a lower modulation level (step 124). Specifically, the modulation is changed from 64QAM-V to 16QAM-VH. This distributes traffic to the back polarization and reduces the modulation level, improving resistance to fading while maintaining the transmission rate.
  • the transmitting device 30 determines whether or not a request to return to the modulation method has been received from the receiving device 34 (step 126). If the request to return is not received, the processing of step 124 is repeated. As a result, the transmitting device 30 continues to perform 16QAM-VH modulation processing.
  • step 1228 if it is determined that a request to restore the modulation method has been received from the receiving device 34, the modulation method compatible with high multi-values is restored and transmission using the reverse polarization is stopped (step 128). Specifically, a return is made from 16QAM-VH modulation to 64QAM-V modulation. Thereafter, the processing from step 120 onwards described above is repeatedly performed.
  • 64QAM is switched to 16QAM to increase resistance to fading, but the method of increasing resistance to fading is not limited to this.
  • resistance may be increased by lowering the modulation multi-level number by switching between 16PSK, 8PSK, QPSK, BPSK, etc.
  • resistance to fading may be increased by switching between a modulation method using QAM and a modulation method using PSK.
  • the modulation multi-level number may be switched to a combination that allows such a rate reduction.
  • the BER is detected by detecting error bits using CRC bits, but the method is not limited to this.
  • the BER may be detected using any known method.
  • the modulation multi-level number is reduced and the use of the reverse polarization is started, but the present disclosure is not limited to this. This switching may also be performed based on degradation of the C/N ratio.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Radio Relay Systems (AREA)

Abstract

Un dispositif de transmission (30) exécute une modulation 64-QAM-V pour transmettre un signal 64-QAM à l'aide d'ondes polarisées V, une modulation 16-QAM-VH pour transmettre un signal 16-QAM à l'aide d'ondes polarisées V et d'ondes polarisées H, un processus pour commuter la modulation 64-QAM-V vers la modulation 16-QAM-VH lors de la réception d'une demande de commutation, et un processus pour rétablir la modulation 16-QAM-VH vers la modulation 64-QAM-V lors de la réception d'une demande de restauration. Un dispositif de réception (34) exécute : une démodulation 64-QAM-V pour démoduler un signal 64-QAM transmis à l'aide des ondes polarisées V ; une démodulation 16-QAM-VH pour démoduler un signal 16-QAM transmis à l'aide des ondes polarisées V et des ondes polarisées H ; un processus pour transmettre la demande de commutation au dispositif de transmission (30) et commuter la démodulation 64-QAM-V vers la démodulation 16-QAM-VH lorsque l'influence de l'évanouissement est reconnue dans le signal reçu ; et transmettre la demande de rétablissement au dispositif de transmission (30) et rétablir la démodulation 1-QAM-VH vers la démodulation 64-QAM-V lorsque l'influence de l'évanouissement est éliminée.
PCT/JP2023/009942 2023-03-14 2023-03-14 Système de relais radio, dispositif de relais radio, procédé de relais radio et programme de relais radio Pending WO2024189797A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2025506332A JPWO2024189797A1 (fr) 2023-03-14 2023-03-14
PCT/JP2023/009942 WO2024189797A1 (fr) 2023-03-14 2023-03-14 Système de relais radio, dispositif de relais radio, procédé de relais radio et programme de relais radio

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2023/009942 WO2024189797A1 (fr) 2023-03-14 2023-03-14 Système de relais radio, dispositif de relais radio, procédé de relais radio et programme de relais radio

Publications (1)

Publication Number Publication Date
WO2024189797A1 true WO2024189797A1 (fr) 2024-09-19

Family

ID=92754728

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2023/009942 Pending WO2024189797A1 (fr) 2023-03-14 2023-03-14 Système de relais radio, dispositif de relais radio, procédé de relais radio et programme de relais radio

Country Status (2)

Country Link
JP (1) JPWO2024189797A1 (fr)
WO (1) WO2024189797A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013005585A1 (fr) * 2011-07-01 2013-01-10 日本電気株式会社 Système d'annulation d'interférence de polarisations croisées, dispositif de station sans fil, procédé de communication sans fil
WO2014020796A1 (fr) * 2012-08-03 2014-02-06 日本電気株式会社 Système de communication sans fil et procédé pour la commande de ce système
JP2017038310A (ja) * 2015-08-12 2017-02-16 日本電信電話株式会社 無線回線割当方法および無線回線割当装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013005585A1 (fr) * 2011-07-01 2013-01-10 日本電気株式会社 Système d'annulation d'interférence de polarisations croisées, dispositif de station sans fil, procédé de communication sans fil
WO2014020796A1 (fr) * 2012-08-03 2014-02-06 日本電気株式会社 Système de communication sans fil et procédé pour la commande de ce système
JP2017038310A (ja) * 2015-08-12 2017-02-16 日本電信電話株式会社 無線回線割当方法および無線回線割当装置

Also Published As

Publication number Publication date
JPWO2024189797A1 (fr) 2024-09-19

Similar Documents

Publication Publication Date Title
JP5852186B2 (ja) 異なる偏波をもつ複数のアンテナを使用するための方法及び装置
US9660716B2 (en) Systems and methods for wireless communication using polarization diversity
US5345600A (en) Method and apparatus for selectively-enabled diversity signaling in a radio communications system
US7839952B2 (en) Data rate coordination in protected variable-rate links
JPWO2007148784A1 (ja) 無線通信装置及びその変調方式切り替え方法
JP5177276B2 (ja) 適応変調方法、無線通信システムおよび無線装置
US20070082623A1 (en) Mimo transmitter and receiver for low-scattering environments
CN102598560B (zh) 无线电通信系统及其控制方法
US10568043B2 (en) Communication device and communication method
US20150249522A1 (en) Method and system for switching modulation mode, and network element
JP4189273B2 (ja) 通信装置
WO2024189797A1 (fr) Système de relais radio, dispositif de relais radio, procédé de relais radio et programme de relais radio
US9942827B2 (en) Dynamic crossband link method and wireless extender
JP5333608B2 (ja) 複合条件判定ユニット、伝送装置、複合条件判定方法
WO2007026682A1 (fr) Système de communication sans fil, terminal de communication sans fil, station de base, programme et procédé de communication sans fil
CN112886998B (zh) 一种微波传输方法以及相关设备
EP4500702A1 (fr) Estimation du canal de la liaison radio micro-onde los-mimo pour les canaux de rang insuffisant
EP3258616B1 (fr) Dispositif de réception et procédé de traitement de réception de signal
US20050163092A1 (en) Radio apparatus and base station apparatus
WO2008088194A1 (fr) Procédé et appareil pour la transmission et la réception d'un signal dans un système de communication
WO2023191670A1 (fr) Reconfiguration de la liaison radio micro-ondes los-mimo pour un nombre variable de flux de données mimo
WO2023191671A1 (fr) Fonctionnement d'une liaison hertzienne los-mimo en présence d'interférences
JPH11154876A (ja) 送信電力制御方法および装置
JP2006074448A (ja) ダイバーシチ通信方法及び無線通信局

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 23927418

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2025506332

Country of ref document: JP

Kind code of ref document: A

WWE Wipo information: entry into national phase

Ref document number: 2025506332

Country of ref document: JP

NENP Non-entry into the national phase

Ref country code: DE