[go: up one dir, main page]

US20060063494A1 - Remote front-end for a multi-antenna station - Google Patents

Remote front-end for a multi-antenna station Download PDF

Info

Publication number
US20060063494A1
US20060063494A1 US11/075,005 US7500505A US2006063494A1 US 20060063494 A1 US20060063494 A1 US 20060063494A1 US 7500505 A US7500505 A US 7500505A US 2006063494 A1 US2006063494 A1 US 2006063494A1
Authority
US
United States
Prior art keywords
signal
signals
amplifier
amplified
port
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.)
Abandoned
Application number
US11/075,005
Other languages
English (en)
Inventor
Xiangdon Zhang
Jay Walton
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.)
Qualcomm Inc
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to US11/075,005 priority Critical patent/US20060063494A1/en
Priority to CN2005800415348A priority patent/CN101124737B/zh
Priority to EP05801139A priority patent/EP1800411B1/fr
Priority to PCT/US2005/034182 priority patent/WO2006041652A2/fr
Priority to JP2007535704A priority patent/JP2008516527A/ja
Assigned to QUALCOMM INCORPORATED reassignment QUALCOMM INCORPORATED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: WALTON, JAY RODNEY, ZHANG, XIANGDONG
Publication of US20060063494A1 publication Critical patent/US20060063494A1/en
Priority to US12/352,199 priority patent/US8509708B2/en
Priority to JP2010046416A priority patent/JP2010193462A/ja
Priority to JP2012204566A priority patent/JP2013048429A/ja
Abandoned legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/18—Input circuits, e.g. for coupling to an antenna or a transmission line
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/44—Transmit/receive switching
    • H04B1/48—Transmit/receive switching in circuits for connecting transmitter and receiver to a common transmission path, e.g. by energy of transmitter

Definitions

  • the present invention relates generally to electronics, and more specifically to a wireless multi-antenna station.
  • a multiple-input multiple-output (MIMO) communication system employs multiple (T) transmit antennas at a transmitting station and multiple (R) receive antennas at a receiving station for data transmission.
  • a MIMO channel formed by the T transmit antennas and R receive antennas may be decomposed into S spatial channels, where S ⁇ min ⁇ T, R ⁇ .
  • the S spatial channels may be used to transmit data in parallel to achieve higher throughput and/or redundantly to achieve greater reliability.
  • a multi-antenna station is equipped with multiple antennas that may be used for data transmission and reception.
  • Each antenna is typically associated with a transceiver that includes (1) transmit circuitry used to process a baseband output signal and generate a radio frequency (RF) output signal suitable for transmission via the antenna and (2) receive circuitry used to process an RF input signal received via the antenna and generate a baseband input signal.
  • the multi-antenna station also has digital circuitry for processing data for transmission and reception.
  • the antennas of the multi-antenna station may not be located near the transceivers for various reasons. For example, it may be desirable to place the antennas at different locations and/or with sufficient separation in order to (1) decorrelate the spatial channels as much as possible and (2) achieve good reception of RF input signals and transmission of RF output signals.
  • the multi-antenna station may be designed such that it is not possible to locate the antennas near their associated transceivers. In any case, if the antennas are not located near the transceivers, then relatively long RF cables or transmission lines are needed to connect the antennas to the transceivers. A fair amount of signal loss may result from the long connection between the antennas and the transceivers. This signal loss increases the receiver noise figure on the receive path and lowers the transmit power level on the transmit path. These effects make the system less power efficient and degrade performance.
  • a station equipped with multiple antennas which includes multiple transceivers and multiple remote front-ends.
  • Each transceiver performs signal conditioning for RF signals transmitted and received via an associated antenna.
  • Each remote front-end couples to an associated transceiver and an associated antenna, amplifies a first RF signal received from the associated transceiver to generate a first amplified RF signal for transmission from the associated antenna, and further amplifies a second RF signal received from the associated antenna to generate a second amplified RF signal for transmission to the associated transceiver.
  • a station equipped with multiple antennas which includes means for performing signal conditioning for RF signals transmitted and received via the antennas, means for power amplifying RF modulated signals received from the means for performing signal conditioning to generate amplified RF modulated signals for transmission from the antennas, and means for low noise amplifying RF input signals received from the antennas to generate amplified RF input signals for transmission to the means for performing signal conditioning.
  • the means for power amplifying and the means for low noise amplifying are separate from the means for performing signal conditioning.
  • an apparatus suitable for use with a station equipped with multiple antennas which includes first and second amplifiers and first and second coupling units.
  • the first amplifier receives and amplifies a first radio frequency (RF) signal and provides a first amplified RF signal.
  • the second amplifier receives and amplifies a second RF signal and provides a second amplified RF signal.
  • the first coupling unit couples the first RF signal from a first port to the first amplifier and couples the second amplified RF signal from the second amplifier to the first port.
  • the second coupling unit couples the first amplified RF signal from the first amplifier to a second port and couples the second RF signal from the second port to the second amplifier.
  • an apparatus suitable for use with a station equipped with multiple antennas which includes means for amplifying a first RF signal to generate a first amplified RF signal, means for amplifying a second RF signal to generate a second amplified RF signal, means for coupling the first RF signal from a first port to the means for amplifying the first RF signal, means for coupling the first amplified RF signal to a second port, means for coupling the second RF signal from the second port to the means for amplifying the second RF signal, and means for coupling the second amplified RF signal to the, first port.
  • a transceiver module for use in a station equipped with multiple antennas which includes first and second transceivers, an oscillator, and a driver. Each transceiver performs signal conditioning for RF signals transmitted and received via an associated set of at least one antenna.
  • the oscillator generates local oscillator (LO) signals used by the first and second transceivers for frequency conversion between baseband and RF.
  • the driver receives the LO signals from the oscillator and drives the LO signals from the transceiver module.
  • a transceiver module for use in a station equipped with multiple antennas which includes means for performing signal conditioning for RF signals transmitted and received via at least two antennas, means for generating LO signals used for frequency conversion between baseband and RF, and means for driving the LO signals from the transceiver module.
  • FIG. 1 shows a multi-antenna station.
  • FIG. 2A shows a remote front-end for a time division duplexed (TDD) system.
  • TDD time division duplexed
  • FIG. 2B shows a remote front-end for a frequency division duplexed (FDD) system.
  • FDD frequency division duplexed
  • FIGS. 3, 4 and 5 show three embodiments for coupling the remote front-end to a transceiver.
  • FIG. 6 shows connection of the remote front-end to a cable and an antenna.
  • FIG. 7 shows a block diagram of a MIMO unit within the multi-antenna station.
  • FIG. 8 shows a block diagram of 2 ⁇ 2 transceiver modules.
  • FIG. 9 shows a block diagram of the transceivers within the transceiver modules.
  • FIG. 1 shows a block diagram of a multi-antenna station 100 , which is equipped with N antennas 150 a through 150 n , where N ⁇ 2.
  • Multi-antenna station 100 may be a wireless communication device, a user terminal, a television, a digital video disc (DVD) player, an audio/video (AV) equipment, a consumer electronics unit, or some other device or apparatus.
  • a reference numeral with a character denotes a specific instance or embodiment of an element, block, or unit.
  • a reference numeral without a character can denote all of the elements with that reference numeral (e.g., antennas 150 a through 150 n ) or any one of the elements with that reference numeral, depending on the context in which the reference numeral is used.
  • Multi-antenna station 100 includes a MIMO unit 110 and N remote front-ends (RFEs) 140 a through 140 n for N antennas 150 a through 150 n , respectively.
  • MIMO unit 110 includes a MIMO processor 120 and N transceivers 130 .
  • MIMO processor 120 performs digital processing for data transmission and reception.
  • N transceivers 130 perform signal conditioning (e.g., amplification, filtering, frequency upconversion/downconversion, and so on) on the RF signals for the N antennas 150 .
  • N transceivers 130 couple to N remote front-ends 140 a through 140 n via cables 142 a through 142 n , respectively.
  • Remote front-ends 140 a through 140 n further couple to N antennas 150 a through 150 n , respectively, via cables 144 a through 144 n , respectively.
  • Antennas 150 may be located either close to or some distance away from MIMO unit 110 , depending on the design of multi-antenna station 100 .
  • Remote front-ends 140 condition (e.g., amplify and filter) RF modulated signals received from transceivers 130 and generate RF output signals for transmission from antennas 150 .
  • Remote front-ends 140 also condition RF input signals received from antennas 150 and generate conditioned RF input signals for transceivers 130 .
  • Remote front-ends 140 are located as close as possible to antennas 150 to reduce the signal loss in cables 144 between remote front-ends 140 and antennas 150 .
  • Remote front-ends 140 may be optional, and may or may not be installed depending on various factors such as the supported applications, the desired performance, cost, and so on. Remote front-ends 140 may be installed to reduce signal loss between antennas 150 and transceivers 130 , which may be desirable or necessary if the distance between the antennas and the transceivers is relatively long and the supported applications require high data rates. Remote front-ends 140 may be omitted for lower rate applications and/or if the distance between antennas 150 and transceivers 130 is relatively short. If remote front-ends 140 are omitted, then antennas 150 couple directly to transceivers 130 via cables 142 .
  • FIG. 2A shows a block diagram of an embodiment of a remote front-end 140 v , which may be used for each of remote front-ends 140 a through 140 n in FIG. 1 .
  • Remote front-end 140 v may be used for a TDD communication system that transmits data on the downlink and uplink on the same frequency band at different times. For example, data may be sent on one link (e.g., downlink) in a first portion or phase of each TDD frame, and data may be sent on the other link (e.g., uplink) in a second portion of each TDD frame.
  • the first and second portions may be static or may change from TDD frame to TDD frame.
  • remote front-end 140 v includes switches 210 and 240 , a power amplifier (PA) 220 , a low noise amplifier (LNA) 230 , and a bandpass filter 250 .
  • Switch 210 couples to a first port of remote front-end 140 v , which further couples to a transceiver 130 .
  • Filter 250 couples to a second port of remote front-end 140 v , which further couples to an antenna 150 .
  • Switches 210 and 240 receive a transmit/receive (T/R) control signal that indicates whether RF signals are being transmitted or received by multi-antenna station 100 . Each switch couples its input to a “T” output during the transmit portion and to an “R” output during the receive portion.
  • T/R transmit/receive
  • Switch 210 allows remote front-end 140 v to receive an RFE input signal from transceiver 130 and send an RFE output signal to the transceiver via a single port. This simplifies the connection between remote front-end 140 v and transceiver 130 .
  • switch 210 receives an RF modulated signal (which is the RFE input signal) from transceiver 130 via the first port and routes this RFE input signal to power amplifier 220 .
  • Power amplifier 220 amplifies the RFE input signal with a fixed or variable gain and provides the desire output signal level.
  • Switch 240 receives the amplified RFE input signal from power amplifier 220 and routes this signal to filter 250 .
  • Filter 250 filters the amplified RFE input signal to remove out-of-band noise and undesired signal components and provides an RF output signal via the second port to antenna 150 .
  • filter 250 receives an RF input signal from antenna 150 via the second port, filters this RF input signal, and provides a filtered RF input signal to switch 240 .
  • Switch 240 routes the filtered RF input signal to LNA 230 , which amplifies the signal.
  • LNA 230 may also have a fixed or variable gain and is designed to provide the desire performance (e.g., to have the desired noise figure).
  • Switch 210 receives the amplified RF input signal (which is the RFE output signal) from LNA 230 and provides the RFE output signal via the first port to transceiver 130 .
  • Remote front-end 140 v may be used to provide low loss for the RF signals sent between the remote front-end and transceiver 130 .
  • Remote front-end 140 v may also be used to provide the desired output power level for the RF output signal transmitted from antenna 150 .
  • transceiver 130 may be implemented on an RFIC and may be capable of providing low or medium output power level for the RF modulated signal sent to remote front-end 140 v .
  • Power amplifier 220 within remote front-end 140 v may then provide amplification and high output power level for the RF output signal.
  • Power amplifier 220 and/or LNA 230 may be powered down whenever possible to reduce power consumption.
  • power amplifier 220 (and possibly LNA 230 ) may be powered down when multi-antenna station 100 is idle.
  • power amplifier 220 may be powered down during the receive portion based on the T/R control signal
  • LNA 230 may be powered down during the transmit portion based on the T/R control signal, as indicated by the dashed line in FIG. 2A .
  • FIG. 2B shows an embodiment of a remote front-end 140 w that may be used for an FDD system.
  • An FDD communication system can simultaneously transmit data on the downlink and uplink at the same time on different frequency bands.
  • remote front-end 140 w includes duplexers 212 and 242 , power amplifier 220 , and LNA 230 .
  • duplexer 212 filters the RFE input signal received via the first port and routes the filtered RFE input signal to power amplifier 220 .
  • Duplexer 242 filters the output signal from power amplifier 220 and provides the filtered signal as the RF output signal to the second port.
  • duplexer 242 filters the RF input signal received via the second port and routes this signal to LNA 230 .
  • Duplexer 212 filters the output signal from LNA 230 and provides this signal as the RFE output signal to the first port.
  • the T/R control signal is not needed for remote front-end 140 w.
  • FIGS. 2A and 2B show specific designs for remote front-ends 140 v and 140 w , respectively.
  • the transmit and receive paths may each include one or more stages of amplifier, filter, and so on.
  • the transmit and receive paths may also include fewer, different, and/or additional circuit blocks not shown in FIGS. 2A and 2B .
  • switch 210 in FIG. 2A may be omitted, and the RFE input and output signals may be sent via separate cables.
  • remote front-end 140 v receives (1) the T/R control signal that toggles switches 210 and 240 between the “T” and “R” output ports and (2) a DC supply for the active circuits, e.g., power amplifier 220 and LNA 230 .
  • the RF signals, T/R control signal, and DC supply may be provided to remote front-end 140 v in various manners, as described below.
  • FIG. 3 shows a first embodiment for coupling a remote front-end 140 x to a transceiver 130 x via a cable 142 x .
  • Remote front-end 140 x includes all of the circuit blocks in remote front-end 140 v , which is described above in FIG. 2A .
  • Remote front-end 140 x further includes a capacitor 202 , an inductor 204 , and a power control unit 206 .
  • Capacitor 202 couples between the first port of remote front-end 140 x and the input of switch 210 .
  • Capacitor 202 performs AC coupling of the RFE input/output signals and also performs DC blocking of the DC supply voltage.
  • Inductor 204 which is often called an RF choke, couples between the first port of remote front-end 140 x and power control unit 206 .
  • Inductor 204 routes the DC supply voltage received via a coaxial cable 310 to power control unit 206 and further performs RF blocking.
  • Power control unit 206 receives the DC supply voltage via inductor 204 and provides the supply voltage for power amplifier 220 , LNA 230 , and other active circuit blocks (if any) within remote front-end 140 x.
  • an AC coupling/DC blocking capacitor 302 couples the RF signals between transceiver 130 x and coaxial cable 310 .
  • An inductor 304 couples the DC supply voltage from a power source 306 to coaxial cable 310 .
  • Capacitor 302 and inductor 304 at transceiver 130 x perform the same function as capacitor 202 and inductor 204 , respectively, at remote front-end 140 x.
  • cable 142 x includes coaxial cable 310 and a messenger cable 320 .
  • Coaxial cable 310 has a center conductor 312 and an outer shield 314 .
  • Center conductor 312 carries RF signals as well as the DC supply voltage between transceiver 130 x and remote front-end 140 x .
  • Outer shield 314 is electrically grounded at both transceiver 130 x and remote front-end 140 x .
  • Coaxial cable 310 is designed to have the proper impedance (e.g., 50 ⁇ or 75 ⁇ ) at the operating frequency.
  • Messenger cable 320 has a center conductor 322 that carries the T/R control signal from MIMO processor 120 to remote front-end 140 x .
  • Messenger cable 320 may share/utilize outer shield 314 of coaxial cable 310 (as shown in FIG. 3 ) or may be provided with its own shield (not shown in FIG. 3 ).
  • Messenger cable 320 is designed to provide good performance for the T/R control signal, e.g., good waveform fidelity for the leading and trailing transitions in the T/R control signal.
  • Coaxial cable 310 and messenger cable 320 may be bundled together for easy handling.
  • both cables 310 and 320 may be coated with an outer insulation material (e.g., plastic). In this case, only one bundled cable connects remote front-end 140 x to transceiver 130 x and carries all of the required signals and power, e.g., the RF signals, T/R control signal, and DC power.
  • FIG. 4 shows a second embodiment for coupling remote front-end 140 x to transceiver 130 x via a cable 142 y .
  • cable 142 y includes a coaxial cable 410 and a twisted wire 420 .
  • Coaxial cable 410 has (1) a center conductor 412 that carries the RF signals and DC supply and (2) an outer shield 414 that is electrically grounded at both transceiver 130 x and remote front-end 140 x .
  • Twisted wire 420 has a first conductor 422 that carries the T/R control signal and a second conductor 424 that is electrically grounded at both transceiver 130 x and remote front-end 140 x . Twisted wire 420 provides good performance for the T/R control signal.
  • Coaxial cable 410 may be any coaxial cable that is commercially available, and twisted wire 420 may also be any commercially available twisted wire. Coaxial cable 410 and twisted wire 420 may be bundled together for easy handling. For example, coaxial cable 410 and twisted wire 420 may be coated with an outer insulation material.
  • FIG. 5 shows a third embodiment for coupling a remote front-end 140 y to a transceiver 130 y via a cable 142 z .
  • cable 142 z includes coaxial cable 410 and a twisted wire 520 .
  • Twisted wire 520 has a first conductor 522 that carries the T/R control signal, a second conductor 524 that carries the DC supply, and a third conductor 526 that is grounded at both transceiver 130 y and remote front-end 140 y .
  • Twisted wire 520 provides good performance for the T/R control signal and may be any commercially available twisted wire with three or more conductors.
  • Coaxial cable 410 and twisted wire 520 may be bundled together for easy handling.
  • AC coupling/DC blocking capacitors and RF choke inductors are not needed at transceiver 130 y and remote front-end 140 y because the DC supply is provided via a dedicated wire instead of the center conductor of coaxial cable 410 .
  • FIGS. 3 through 5 show three exemplary embodiments for sending signals and DC power to a remote front-end. Signals and DC power may also be sent in other manners.
  • a single coaxial cable may be used to send the RF signals, T/R control signal, and DC supply.
  • the T/R control signal may be conveyed by a change in the DC supply voltage, e.g., a Vhigh voltage for logic high on the T/R control signal and a Vlow voltage for logic low on the T/R control signal.
  • the T/R control signal may also be conveyed by pulses sent to indicate the start of the transmit and receive portions.
  • a pulse of a first polarity and/or a first width may be sent at the start of the transmit portion, and a pulse of a second polarity and/or a second width may be sent at the start of the receive portion.
  • each signal may be sent via a wire, a cable, or some other medium capable of propagating that signal with a tolerable amount of loss.
  • the DC supply may be shut off if the remote front-ends are not installed.
  • a sensing circuit within power source 306 in MIMO unit 110 can detect whether the remote front-ends are installed. This detection may be achieved in various manners. For example, the amount of current being consumed may be sensed, and no current consumption would indicate that the remote front-ends are not installed. As another example, the impedance of the wire carrying the DC supply may be sensed, and high or open impedance would indicate that the remote front-ends are not installed. If the remote front-ends are not installed, then power source 306 can shut off the DC supply.
  • FIG. 6 shows a diagram of an embodiment for connecting remote front-end 140 x to cable 142 x and antenna 150 x .
  • Remote front-end 140 x has a female connector 620 for the first port and a male connector 630 for the second port.
  • Cable 142 x has a male connector 610 that couples to female connector 620 of remote front-end 140 x .
  • Male connector 630 of remote front-end 140 x couples to a female connector 640 for antenna 150 x.
  • remote front-end 140 x is coupled as close as possible to antenna 150 x to reduce loss for the RF input/output signals.
  • Connector 640 may represent the bulk of cable 144 x between remote front-end 140 x and antenna 150 x .
  • the use of different connectors 620 and 630 for the first and second ports of remote front-end 140 x prevents backward installation of remote front-end 140 x since (1) the first port can couple to cable 142 x only via connector 620 and (2) the second port can couple to antenna 150 x only via connector 630 .
  • remote front-end 140 x allows for optional installation of remote front-end 140 x .
  • remote front-end 140 x may be installed if lower loss is desired for applications requiring high data rates.
  • Remote front-end 140 x may be omitted for applications that can tolerate more loss.
  • cable 142 x would couple directly to antenna 150 x via connectors 610 and 640 .
  • FIG. 6 shows a specific embodiment for connecting remote front-end 140 x to cable 142 x and antenna 150 x .
  • Other types of connectors may also be used for a remote front-end to achieve the desired connection, prevent backward installation of the remote front-end, and allow for optional installation of the remote front-end.
  • FIG. 7 shows a block diagram of a MIMO unit 110 z, which is one embodiment of MIMO unit 110 in FIG. 1 .
  • Each 2 ⁇ 2 transceiver module 710 includes two transceivers for two antennas.
  • Each transceiver includes transmit circuitry and receive circuitry for one antenna.
  • Each 2 ⁇ 2 transceiver module may be fabricated on a separate IC die, or multiple 2 ⁇ 2 transceiver modules may be fabricated on the same IC die.
  • MIMO processor 120 z couples to each transceiver module 710 via a respective set of baseband signals and control signals.
  • FIG. 8 shows a block diagram of an embodiment of 2 ⁇ 2 transceiver modules 710 a and 710 b for MIMO unit 110 z .
  • transceiver module 710 a includes two transceivers 810 a and 810 b , a voltage controlled oscillator (VCO) 820 a , a phase locked loop (PLL) 830 a , an input buffer (Buf) 832 a , and an output driver (Driv) 834 a .
  • Transceiver module 710 b includes two transceivers 810 c and 810 d , a VCO 820 b , a PLL 830 b , an input buffer 832 b , and an output driver 834 b .
  • Each transceiver 810 receives and processes a baseband input signal from MIMO processor 120 z and generates an RF modulated signal for one antenna 150 .
  • Each transceiver 810 also receives and processes an RFE output signal from an associated remote front-end 140 (or an RF input signal from an associated antenna 150 ) and generates a baseband input signal for MIMO processor 120 z.
  • transceiver module 710 a When transceiver modules 710 a and 710 b are used to support four antennas, transceiver module 710 a serves as the master module and transceiver module 710 b is the slave module.
  • VCO 820 a and PLL 830 a within transceiver module 710 a are enabled and generate local oscillator (LO) signals used by all four transceivers 810 a through 810 d for frequency upconversion and downconversion.
  • VCO 820 b and PLL 830 b within transceiver module 710 b are disabled, driver 834 b and buffer 832 a are also disabled, and driver 834 a and buffer 832 b are enabled.
  • the LO signals from VCO 820 a are provided via driver 834 a and buffer 832 b to transceivers 810 c and 810 d in the slave transceiver module 710 b.
  • 2 ⁇ 2 transceiver modules may be efficiently used for multi-antenna stations with different numbers of antennas.
  • For a multi-antenna station equipped with two antennas only one 2 ⁇ 2 transceiver module 710 is needed, and no additional and unnecessary circuitry is wasted.
  • VCO 820 and PLL 830 are enabled to generate the LO signals for the two transceivers 810 in the transceiver module, and driver 834 and buffer 832 are disabled.
  • two 2 ⁇ 2 transceiver modules may be used for the four antennas, and only a small amount of redundant circuitry is not used.
  • FIG. 9 shows a block diagram of an embodiment of transceivers 810 within 2 ⁇ 2 transmitter modules 710 .
  • Each transceiver 810 includes a transmitter unit (TMTR) 960 and a receiver unit (RCVR) 980 .
  • the transmitter and receiver units may be implemented with a super-heterodyne architecture or a direct-conversion architecture.
  • TMTR transmitter unit
  • RCVR receiver unit
  • the transmitter and receiver units may be implemented with a super-heterodyne architecture or a direct-conversion architecture.
  • IF intermediate frequency
  • For the direct-conversion architecture frequency conversion is performed in a single stage, e.g., from RF directly to baseband.
  • FIG. 9 shows an embodiment of transmitter unit 960 and receiver unit 980 implemented with the direct-conversion architecture.
  • a digital-to-analog converter (DAC) 962 receives a stream of digital chips (which is the baseband input signal) from MIMO processor 120 z , converts the chips to analog, and provides an analog baseband signal.
  • a filter 964 filters the analog baseband signal to remove undesired images generated by the digital-to-analog conversion and provides a filtered baseband signal.
  • An amplifier (Amp) 966 amplifies and buffers the filtered baseband signal and provides an amplified baseband signal.
  • a mixer 968 modulates a TX_LO signal from VCO 820 a with the amplified baseband signal and provides an upconverted signal.
  • a power amplifier 970 amplifies the upconverted signal and provides an RF modulated signal, which is routed through a switch (SW) 972 and provided to an associated remote front-end 140 for one antenna.
  • SW switch
  • an LNA 982 receives an RFE output signal from the associated remote front-end 140 or an RF input signal from an associated antenna 150 via switch 972 .
  • LNA 982 amplifies the received RF signal and provides a conditioned signal having the desired signal level.
  • a mixer 984 demodulates the conditioned signal with an RX_LO signal from VCO 820 a and provides a downconverted signal.
  • a filter 986 filters the downconverted signal to pass the desired signal components and to remove noise and undesired signals that may be generated by the frequency downconversion process.
  • An amplifier 988 amplifies and buffers the filtered signal and provides an analog baseband signal.
  • An analog-to-digital converter (ADC) 990 digitizes the analog baseband signal and provides a stream of samples (which is the baseband output signal) to MIMO processor 120 z.
  • ADC analog-to-digital converter
  • FIG. 9 shows an exemplary design for the transmitter and receiver units.
  • the DAC and ADC are shown as being parts of the transmitter unit and receiver unit, respectively.
  • the transmitter and receiver units may each include one or more stages of amplifier, filter, mixer, and so on, which may be arranged in a manner different from that shown in FIG. 9 .
  • the transmitter and receiver units may or may not include the DAC and ADC, respectively.
  • FIG. 9 also shows an embodiment of MIMO processor 120 z , which includes various processing units that perform digital processing for data transmission and reception.
  • a data processor 914 performs encoding, interleaving, and symbol mapping for data transmission and symbol demapping, deinterleaving, and decoding for data reception.
  • a spatial processor 916 performs transmitter spatial processing (e.g., for beamforming, spatial multiplexing, and so on) for data transmission and receiver spatial processing (e.g., receiver match filtering) for data reception.
  • a modulator 918 performs modulation, e.g., for orthogonal frequency division multiplexing (OFDM).
  • a demodulator 920 performs demodulation, e.g., for OFDM.
  • a detection/acquisition unit 922 performs processing to detect and acquire signals from other transmitting stations.
  • a main controller 930 controls the operation of various processing units within multi-antenna station 100 and generates the various controls for transceivers 810 and remote front-ends 140 . For example, main controller 930 may generate the T/R control signal for remote front-ends 140 .
  • a power controller 932 performs power management for multi-antenna station 100 . For example, power controller 932 may determine whether or not to send DC power to the remote front-ends.
  • a random access memory (RAM) and a read only memory (ROM) 912 store data and program codes used by various processing units within MIMO processor 120 z.
  • each remote front-end being coupled to one antenna, and each transceiver processing the RF signals for one antenna.
  • each remote front-end and/or each transceiver may be associated with a set of one or more antennas. If a remote front-end or transceiver is associated with multiple antennas, then these antennas may be viewed as a single (distributed) “antenna” for the remote front-end or transceiver.
  • remote front-ends and transceiver modules described herein may be implemented on RF integrated circuits (RFICs), with discrete components, and so on.
  • RFICs RF integrated circuits
  • each remote front-end may be implemented on one RFIC.
  • Each transceiver module may be implemented on one RFIC, or multiple transceiver modules may be implemented on one RFIC, possibly along with other circuitry.
  • the remote front-ends and transceiver modules may be fabricated with various integrated circuit (IC) processes such as complementary metal oxide semiconductor (CMOS), bipolar, bipolar-CMOS (Bi-CMOS), gallium arsenide (GaAs), and so on.
  • CMOS complementary metal oxide semiconductor
  • Bi-CMOS bipolar-CMOS
  • GaAs gallium arsenide
  • each remote front-end may be fabricated on one GaAs RFIC.
  • Certain circuit components e.g., inductors
  • MEMS Micro-Electro-Mechanical Systems
  • control signals used to control the operation of the remote front-ends and the transceiver modules are shown as being generated by MIMO processor 120 in the description above.
  • these control signals may be generated by various units such as, for example, an application specific integrated circuit (ASIC), a digital signal processor (DSP), a digital signal processing devices (DSPD), a programmable logic device (PLD), a field programmable gate array (FPGA), a processor, a controller, a micro-controller, a microprocessor, or some other electronic unit designed to perform the functions described herein.
  • ASIC application specific integrated circuit
  • DSP digital signal processor
  • DSPD digital signal processing devices
  • PLD programmable logic device
  • FPGA field programmable gate array
  • processor a controller, a micro-controller, a microprocessor, or some other electronic unit designed to perform the functions described herein.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transceivers (AREA)
  • Radio Transmission System (AREA)
US11/075,005 2004-10-04 2005-03-07 Remote front-end for a multi-antenna station Abandoned US20060063494A1 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
US11/075,005 US20060063494A1 (en) 2004-10-04 2005-03-07 Remote front-end for a multi-antenna station
CN2005800415348A CN101124737B (zh) 2004-10-04 2005-09-22 用于多天线设备台的远程前端
EP05801139A EP1800411B1 (fr) 2004-10-04 2005-09-22 Tete radiofrequence distante pour station a antennes multiples
PCT/US2005/034182 WO2006041652A2 (fr) 2004-10-04 2005-09-22 Tete radiofrequence distante pour station a antennes multiples
JP2007535704A JP2008516527A (ja) 2004-10-04 2005-09-22 マルチアンテナステーションのためのリモートフロントエンド
US12/352,199 US8509708B2 (en) 2004-10-04 2009-01-12 Remote front-end for a multi-antenna station
JP2010046416A JP2010193462A (ja) 2004-10-04 2010-03-03 マルチアンテナステーションのためのリモートフロントエンド
JP2012204566A JP2013048429A (ja) 2004-10-04 2012-09-18 マルチアンテナステーションのためのリモートフロントエンド

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US61589104P 2004-10-04 2004-10-04
US11/075,005 US20060063494A1 (en) 2004-10-04 2005-03-07 Remote front-end for a multi-antenna station

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US12/352,199 Division US8509708B2 (en) 2004-10-04 2009-01-12 Remote front-end for a multi-antenna station

Publications (1)

Publication Number Publication Date
US20060063494A1 true US20060063494A1 (en) 2006-03-23

Family

ID=35511017

Family Applications (2)

Application Number Title Priority Date Filing Date
US11/075,005 Abandoned US20060063494A1 (en) 2004-10-04 2005-03-07 Remote front-end for a multi-antenna station
US12/352,199 Expired - Fee Related US8509708B2 (en) 2004-10-04 2009-01-12 Remote front-end for a multi-antenna station

Family Applications After (1)

Application Number Title Priority Date Filing Date
US12/352,199 Expired - Fee Related US8509708B2 (en) 2004-10-04 2009-01-12 Remote front-end for a multi-antenna station

Country Status (5)

Country Link
US (2) US20060063494A1 (fr)
EP (1) EP1800411B1 (fr)
JP (3) JP2008516527A (fr)
CN (1) CN101124737B (fr)
WO (1) WO2006041652A2 (fr)

Cited By (52)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060223458A1 (en) * 2005-04-04 2006-10-05 Behzad Arya R Radio frequency transceiver integrated circuit floor plan applicable to MIMO
US20060229029A1 (en) * 2005-04-07 2006-10-12 Intel Corporation Ultra high frequency / very high frequency (UHF/VHF) band enhancement
US20070098105A1 (en) * 2005-11-02 2007-05-03 Samsung Electronics Co., Ltd. NxN multiple-input multiple-output transceiver
US20070135058A1 (en) * 2005-12-14 2007-06-14 Tzero Technologies, Inc. Method and apparatus for transmitter calibration
US20090117859A1 (en) * 2006-04-07 2009-05-07 Belair Networks Inc. System and method for frequency offsetting of information communicated in mimo based wireless networks
US20090124214A1 (en) * 2004-10-04 2009-05-14 Qualcomm Incorporated Remote front-end for a multi-antenna station
US20090154621A1 (en) * 2007-02-12 2009-06-18 Mobileaccess Networks Ltd. Mimo-adapted distributed antenna system
US20090180466A1 (en) * 2006-04-07 2009-07-16 Belair Networks System and method for frequency offsetting of information communicated in mimo-based wireless networks
WO2009104856A1 (fr) * 2008-02-20 2009-08-27 Samsung Electronics Co,. Ltd. Procédé et dispositif pour traiter des signaux dans un émetteur-récepteur duplex en répartition dans le temps
GB2465404A (en) * 2008-11-18 2010-05-19 Iti Scotland Ltd Plural antenna elements with a switching arrangement and method
US20110070846A1 (en) * 2009-09-23 2011-03-24 Ambit Microsystems (Shanghai) Ltd. Radio frequency-based communication terminal having two exchangeable transmitting paths
US20110124308A1 (en) * 2006-04-07 2011-05-26 Belair Networks Inc. System and method for zero intermediate frequency filtering of information communicated in wireless networks
US20110135308A1 (en) * 2009-12-09 2011-06-09 Luigi Tarlazzi Distributed antenna system for mimo signals
CN102137477A (zh) * 2010-01-22 2011-07-27 国基电子（上海）有限公司 移动台及其信号放大路径的选择方法
US20110201368A1 (en) * 2010-02-12 2011-08-18 Pier Faccin Distributed antenna system for mimo communications
US20130095770A1 (en) * 2011-10-17 2013-04-18 Mehran Moshfeghi Method and system for high-throughput and low-power communication links in a distributed transceiver network
WO2013150346A1 (fr) * 2011-10-25 2013-10-10 Poynting Antennas (Pty) Limited Aide à la communication pour dispositif cellulaire d'utilisateur final
US20140269650A1 (en) * 2013-03-14 2014-09-18 Qualcomm Incorporated Devices, systems, and methods implementing a front end partition of a wireless modem
US8873585B2 (en) 2006-12-19 2014-10-28 Corning Optical Communications Wireless Ltd Distributed antenna system for MIMO technologies
US9014750B2 (en) 2011-01-13 2015-04-21 Nec Casio Mobile Communications, Ltd. Wireless communication device
US20150117421A1 (en) * 2013-10-31 2015-04-30 Samsung Electro-Mechanics Co., Ltd. Adaptive dual band mimo wi-fi apparatus, and operating method thereof
US9054429B2 (en) 2012-03-30 2015-06-09 Kabushiki Kaisha Toshiba Antenna apparatus and electronic device including antenna apparatus
US20150244420A1 (en) * 2014-02-27 2015-08-27 Denso Corporation Communication system, communication slave and communication master
US9173187B2 (en) 2008-03-31 2015-10-27 Golba Llc Determining the position of a mobile device using the characteristics of received signals and a reference database
US9184962B2 (en) 2009-12-09 2015-11-10 Andrew Wireless Systems Gmbh Distributed antenna system for MIMO signals
US9197982B2 (en) 2012-08-08 2015-11-24 Golba Llc Method and system for distributed transceivers for distributed access points connectivity
US9210683B2 (en) 2009-07-09 2015-12-08 Golba Llc Method and system for device positioning utilizing distributed transceivers with array processing
US9231670B2 (en) 2010-10-01 2016-01-05 Commscope Technologies Llc Distributed antenna system for MIMO signals
US9258052B2 (en) 2012-03-30 2016-02-09 Corning Optical Communications LLC Reducing location-dependent interference in distributed antenna systems operating in multiple-input, multiple-output (MIMO) configuration, and related components, systems, and methods
US9366745B2 (en) 2008-03-31 2016-06-14 Golba Llc Methods and systems for determining the location of an electronic device using multi-tone frequency signals
CN105827258A (zh) * 2016-05-09 2016-08-03 中国电子科技集团公司第三十八研究所 一种多路接收系统
US9525472B2 (en) 2014-07-30 2016-12-20 Corning Incorporated Reducing location-dependent destructive interference in distributed antenna systems (DASS) operating in multiple-input, multiple-output (MIMO) configuration, and related components, systems, and methods
US9531452B2 (en) 2012-11-29 2016-12-27 Corning Optical Communications LLC Hybrid intra-cell / inter-cell remote unit antenna bonding in multiple-input, multiple-output (MIMO) distributed antenna systems (DASs)
US20170099608A1 (en) * 2015-10-06 2017-04-06 Skyworks Solutions, Inc. Front end system with lossy transmission line between front end module and transceiver
US9647752B2 (en) 2015-10-13 2017-05-09 Telefonaktiebolaget Lm Ericsson (Publ) Antenna switch control method for analog radio over fiber systems
US9729267B2 (en) 2014-12-11 2017-08-08 Corning Optical Communications Wireless Ltd Multiplexing two separate optical links with the same wavelength using asymmetric combining and splitting
US9829560B2 (en) 2008-03-31 2017-11-28 Golba Llc Determining the position of a mobile device using the characteristics of received signals and a reference database
EP3331316A1 (fr) * 2016-11-30 2018-06-06 Nxp B.V. Compensation d'antenne à distance
US10148336B2 (en) * 2015-08-25 2018-12-04 Cellium Technologies, Ltd. Systems and methods for using spatial multiplexing in conjunction with a multi-conductor cable
US20190020401A1 (en) 2017-07-11 2019-01-17 Movandi Corporation Reconfigurable and modular active repeater device
EP3477873A1 (fr) * 2017-10-25 2019-05-01 Samsung Electronics Co., Ltd. Dispositif électronique comprenant une pluralité d'antennes et son procédé de fonctionnement
US20190181560A1 (en) 2017-12-08 2019-06-13 Movandi Corporation Signal Cancellation in Radio Frequency (RF) Device Network
US10587313B2 (en) 2017-12-07 2020-03-10 Movandi Corporation Optimized multi-beam antenna array network with an extended radio frequency range
WO2020080888A1 (fr) 2018-10-18 2020-04-23 Samsung Electronics Co., Ltd. Dispositif électronique et procédé d'émission d'un signal de référence de liaison montante
US10637159B2 (en) 2018-02-26 2020-04-28 Movandi Corporation Waveguide antenna element-based beam forming phased array antenna system for millimeter wave communication
US10666326B2 (en) 2017-12-08 2020-05-26 Movandi Corporation Controlled power transmission in radio frequency (RF) device network
US10721634B2 (en) 2017-05-30 2020-07-21 Movandi Corporation Non-line-of-sight (NLOS) coverage for millimeter wave communication
US11088457B2 (en) 2018-02-26 2021-08-10 Silicon Valley Bank Waveguide antenna element based beam forming phased array antenna system for millimeter wave communication
US11303346B2 (en) 2015-08-25 2022-04-12 Cellium Technologies, Ltd. Systems and methods for transporting signals inside vehicles
TWI789672B (zh) * 2020-02-03 2023-01-11 仁寶電腦工業股份有限公司 信號傳輸裝置與電纜連接電路
US11637612B2 (en) 2015-08-25 2023-04-25 Cellium Technologies, Ltd. Macro-diversity using hybrid transmissions via twisted pairs
US11757484B2 (en) 2019-03-22 2023-09-12 Vivo Mobile Communication Co., Ltd. Radio frequency front-end circuit and mobile terminal

Families Citing this family (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4498298B2 (ja) * 2006-03-27 2010-07-07 株式会社東芝 無線受信装置
US8023999B2 (en) * 2006-12-28 2011-09-20 Alcatel Lucent Base station architecture using decentralized duplexers
US8515494B2 (en) * 2007-01-13 2013-08-20 Panasonic Automotive Systems Company Of America, Division Of Panasonic Corporation Of North America Highly configurable radio frequency (RF) module
JP2009033327A (ja) * 2007-07-25 2009-02-12 Murata Mfg Co Ltd Ｍｉｍｏ無線装置
US8107895B2 (en) * 2007-09-26 2012-01-31 Broadcom Corporation Independent power consumption management in a MIMO transceiver and method for use therewith
CN101465656A (zh) * 2008-09-05 2009-06-24 华为技术有限公司 一种变频的装置、方法和系统
CN101562460B (zh) * 2009-05-22 2013-04-03 惠州Tcl移动通信有限公司 移动通信终端的无线收发装置
US8510769B2 (en) * 2009-09-14 2013-08-13 Tivo Inc. Media content finger print system
US8965455B2 (en) 2010-01-11 2015-02-24 Qualcomm Incorporated Apparatus and method for reducing energy consumption by cellular base stations
CN102006678B (zh) * 2010-12-02 2013-11-20 惠州Tcl移动通信有限公司 一种移动终端及其射频架构
US9379930B2 (en) * 2011-06-24 2016-06-28 Mediatek Inc. Transmitter devices of I/Q mismatch calibration, and methods thereof
US9350392B2 (en) * 2012-12-12 2016-05-24 Qualcomm Incorporated RFIC configuration for reduced antenna trace loss
US9628203B2 (en) * 2014-03-04 2017-04-18 Qualcomm Incorporated Analog built-in self test transceiver
JP2015233192A (ja) * 2014-06-09 2015-12-24 富士通株式会社 無線装置、及び、無線装置の制御方法
US20160191085A1 (en) * 2014-08-13 2016-06-30 Skyworks Solutions, Inc. Transmit front end module for dual antenna applications
US10505250B2 (en) 2014-11-20 2019-12-10 At&T Intellectual Property I, L.P. Communication system having a cable with a plurality of stranded uninsulated conductors forming interstitial areas for propagating guided wave modes therein and methods of use
US10554454B2 (en) * 2014-11-20 2020-02-04 At&T Intellectual Property I, L.P. Methods and apparatus for inducing electromagnetic waves in a cable
US10505249B2 (en) 2014-11-20 2019-12-10 At&T Intellectual Property I, L.P. Communication system having a cable with a plurality of stranded uninsulated conductors forming interstitial areas for guiding electromagnetic waves therein and method of use
US10505248B2 (en) 2014-11-20 2019-12-10 At&T Intellectual Property I, L.P. Communication cable having a plurality of uninsulated conductors forming interstitial areas for propagating electromagnetic waves therein and method of use
US9742462B2 (en) 2014-12-04 2017-08-22 At&T Intellectual Property I, L.P. Transmission medium and communication interfaces and methods for use therewith
US10516555B2 (en) * 2014-11-20 2019-12-24 At&T Intellectual Property I, L.P. Methods and apparatus for creating interstitial areas in a cable
US10009067B2 (en) 2014-12-04 2018-06-26 At&T Intellectual Property I, L.P. Method and apparatus for configuring a communication interface
US11025460B2 (en) 2014-11-20 2021-06-01 At&T Intellectual Property I, L.P. Methods and apparatus for accessing interstitial areas of a cable
US10411920B2 (en) 2014-11-20 2019-09-10 At&T Intellectual Property I, L.P. Methods and apparatus for inducing electromagnetic waves within pathways of a cable
US10505252B2 (en) 2014-11-20 2019-12-10 At&T Intellectual Property I, L.P. Communication system having a coupler for guiding electromagnetic waves through interstitial areas formed by a plurality of stranded uninsulated conductors and method of use
KR101771241B1 (ko) * 2014-11-25 2017-08-25 주식회사 케이엠더블유 다중 대역 기지국 시스템에 사용되는 컴바이너 및 컴바이너 제어 방법
WO2018119884A1 (fr) * 2016-12-29 2018-07-05 西安易朴通讯技术有限公司 Système de commutation et procédé de commutation pour antenne autoadaptative, et terminal intelligent
US10826169B2 (en) * 2019-01-03 2020-11-03 Apple Inc. Radio frequency remote head front-end circuitry systems and methods
WO2021215549A1 (fr) * 2020-04-22 2021-10-28 엘지전자 주식회사 Dispositif électronique de prise en charge de srs et procédé de commande de dispositif électronique
WO2021215550A1 (fr) * 2020-04-22 2021-10-28 엘지전자 주식회사 Dispositif électronique prenant en charge srs, et procédé de commande de dispositif électronique
US12088537B2 (en) 2021-03-18 2024-09-10 National Taiwan University Scalable phased-array system for wireless systems
WO2025134314A1 (fr) * 2023-12-21 2025-06-26 三菱電機株式会社 Dispositif de communication sans fil, procédé de communication sans fil, circuit de commande et support de stockage

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5748669A (en) * 1995-04-27 1998-05-05 Sumitomo Electric Industries, Ltd. Method and apparatus for transmitting information converted to spread spectrum signal
US5812951A (en) * 1994-11-23 1998-09-22 Hughes Electronics Corporation Wireless personal communication system
US20030134601A1 (en) * 2002-01-14 2003-07-17 Chewnpu Jou Active antenna for communications transceiver
US20050264352A1 (en) * 2002-07-19 2005-12-01 Ikuroh Ichitsubo Integrated power amplifier module with power sensor
US7369096B2 (en) * 2003-10-10 2008-05-06 Broadcom Corporation Impedance matched passive radio frequency transmit/receive switch

Family Cites Families (41)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0746781B2 (ja) * 1986-02-06 1995-05-17 日本電気株式会社 テレビチユ−ナ−用半導体装置
US4726050A (en) * 1986-02-18 1988-02-16 Motorola, Inc. Scanning receiver allocation method and apparatus for cellular radiotelephone systems
JP2876894B2 (ja) * 1992-05-06 1999-03-31 日本電気株式会社 送受信共用無線装置
JPH0637666A (ja) * 1992-07-14 1994-02-10 Nec Corp ブースタ
EP0587162B1 (fr) 1992-09-11 2002-02-06 Canon Kabushiki Kaisha Appareil de traitement d'informations
JPH06195157A (ja) * 1992-12-24 1994-07-15 Canon Inc 電子機器及び該電子機器における電力供給制御方法
JP3290831B2 (ja) * 1994-11-21 2002-06-10 明星電気株式会社 アンテナ装置及び基地局
JPH08163190A (ja) * 1994-11-30 1996-06-21 Sony Corp 送受信機
JPH08223071A (ja) 1995-02-08 1996-08-30 Sony Corp 送信機及び送受信機
JPH0946110A (ja) * 1995-07-26 1997-02-14 Sony Corp ダイバシティアンテナ装置及び通信機
JPH0955681A (ja) * 1995-08-16 1997-02-25 Shimada Phys & Chem Ind Co Ltd 時分割複信送受信装置
JPH1013225A (ja) * 1996-06-18 1998-01-16 Sony Corp クロック発生装置、ｐｌｌ回路及び回路装置
US5887267A (en) * 1997-04-04 1999-03-23 Ericsson Inc. Bus arbitrators for common local oscillators in cellular radiotelephone base stations
US6108526A (en) * 1997-05-07 2000-08-22 Lucent Technologies, Inc. Antenna system and method thereof
US6801788B1 (en) * 1997-09-09 2004-10-05 Samsung Electronics Co., Ltd. Distributed architecture for a base station transceiver subsystem having a radio unit that is remotely programmable
US6681100B1 (en) * 1999-03-15 2004-01-20 Teletronics International, Inc. Smart amplifier for time division duplex wireless applications
US6194969B1 (en) * 1999-05-19 2001-02-27 Sun Microsystems, Inc. System and method for providing master and slave phase-aligned clocks
EP1111812A1 (fr) * 1999-12-20 2001-06-27 Nortel Matra Cellular Un reseau de telecommunications cellulaire d'émission et de réception sectorielle et procede de fonctionnement associe
JP3338418B2 (ja) * 2000-01-27 2002-10-28 三洋電機株式会社 無線基地局
GB0004123D0 (en) * 2000-02-23 2000-04-12 Koninkl Philips Electronics Nv Communication system and a receiver for use in the system
JP4253099B2 (ja) * 2000-02-29 2009-04-08 日本精機株式会社 キーレスエントリーシステム
JP2001244840A (ja) * 2000-03-01 2001-09-07 Kenwood Corp 送受信機のローカル回路
JP2002098751A (ja) * 2000-09-25 2002-04-05 Toshiba Corp レーダ装置および信号伝送ケーブル
JP2002171194A (ja) * 2000-11-30 2002-06-14 Matsushita Electric Ind Co Ltd 無線装置、並びにそれを備える携帯情報端末および無線基地局、並びにそれらを含む無線通信システム
DE10114531A1 (de) * 2001-03-21 2002-10-02 Funkwerk Dabendorf Gmbh Schaltungsanordnung zum Kompensieren der Dämpfung in einem Antennenzuleitungskabel für ein Mobilfunkgerät
JP2003018075A (ja) * 2001-07-02 2003-01-17 Hitachi Kokusai Electric Inc 無線通信装置
JP3992489B2 (ja) * 2001-12-12 2007-10-17 株式会社エヌ・ティ・ティ・ドコモ 無線通信方法及びその装置
JP3989748B2 (ja) * 2002-02-21 2007-10-10 本田技研工業株式会社 無線式通話システム
EP1502364A4 (fr) * 2002-04-22 2010-03-31 Ipr Licensing Inc Emetteur-recepteur radio a entrees et sorties multiples
US6728517B2 (en) * 2002-04-22 2004-04-27 Cognio, Inc. Multiple-input multiple-output radio transceiver
JP3719427B2 (ja) * 2002-08-07 2005-11-24 日本電信電話株式会社 搬送波周波数誤差推定回路、無線信号受信装置
US7212788B2 (en) * 2002-08-13 2007-05-01 Atheros Communications, Inc. Method and apparatus for signal power loss reduction in RF communication systems
JP2003152587A (ja) * 2002-08-26 2003-05-23 Toshiba Corp 複合システム共用端末
JP2004104724A (ja) * 2002-09-13 2004-04-02 Renesas Technology Corp 通信用半導体集積回路
JP2004129066A (ja) * 2002-10-04 2004-04-22 Samsung Electronics Co Ltd マルチバンド無線機
JP4546711B2 (ja) * 2002-10-07 2010-09-15 パナソニック株式会社 通信装置
EP2317736A3 (fr) 2002-10-07 2011-07-06 Panasonic Corporation Dispositif de communication et procede de reconfiguration de celui-ci
JP4163014B2 (ja) * 2003-01-24 2008-10-08 京セラ株式会社 無線装置および通信制御方法
JP4146712B2 (ja) * 2002-11-28 2008-09-10 京セラ株式会社 マルチ周波数無線送信機および受信機
JP4025219B2 (ja) * 2003-02-26 2007-12-19 日本無線株式会社 アレイアンテナ通信装置
US20060063494A1 (en) 2004-10-04 2006-03-23 Xiangdon Zhang Remote front-end for a multi-antenna station

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5812951A (en) * 1994-11-23 1998-09-22 Hughes Electronics Corporation Wireless personal communication system
US5748669A (en) * 1995-04-27 1998-05-05 Sumitomo Electric Industries, Ltd. Method and apparatus for transmitting information converted to spread spectrum signal
US20030134601A1 (en) * 2002-01-14 2003-07-17 Chewnpu Jou Active antenna for communications transceiver
US20050264352A1 (en) * 2002-07-19 2005-12-01 Ikuroh Ichitsubo Integrated power amplifier module with power sensor
US7369096B2 (en) * 2003-10-10 2008-05-06 Broadcom Corporation Impedance matched passive radio frequency transmit/receive switch

Cited By (134)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10700754B2 (en) 2001-11-30 2020-06-30 Andrew Wireless Systems Gmbh Distributed antenna system for MIMO signals
US8509708B2 (en) 2004-10-04 2013-08-13 Qualcomm Incorporated Remote front-end for a multi-antenna station
US20090124214A1 (en) * 2004-10-04 2009-05-14 Qualcomm Incorporated Remote front-end for a multi-antenna station
US8472889B2 (en) * 2005-04-04 2013-06-25 Broadcom Corporation Radio frequency transceiver integrated circuit floor plan applicable to MIMO
US20060223458A1 (en) * 2005-04-04 2006-10-05 Behzad Arya R Radio frequency transceiver integrated circuit floor plan applicable to MIMO
US20060229029A1 (en) * 2005-04-07 2006-10-12 Intel Corporation Ultra high frequency / very high frequency (UHF/VHF) band enhancement
US7848435B2 (en) * 2005-11-02 2010-12-07 Samsung Electronics Co., Ltd. NxN multiple-input multiple-output transceiver
US20070098105A1 (en) * 2005-11-02 2007-05-03 Samsung Electronics Co., Ltd. NxN multiple-input multiple-output transceiver
US7623886B2 (en) * 2005-12-14 2009-11-24 NDSSI Holdings, LLC Method and apparatus for transmitter calibration
US20070135058A1 (en) * 2005-12-14 2007-06-14 Tzero Technologies, Inc. Method and apparatus for transmitter calibration
US20090180466A1 (en) * 2006-04-07 2009-07-16 Belair Networks System and method for frequency offsetting of information communicated in mimo-based wireless networks
US8433254B2 (en) 2006-04-07 2013-04-30 Belair Networks Inc. System and method for frequency offsetting of information communicated in MIMO-based wireless networks
US20090117859A1 (en) * 2006-04-07 2009-05-07 Belair Networks Inc. System and method for frequency offsetting of information communicated in mimo based wireless networks
US8447232B2 (en) 2006-04-07 2013-05-21 Belair Networks Inc. System and method for frequency offsetting of information communicated in MIMO-based wireless networks
US20110124308A1 (en) * 2006-04-07 2011-05-26 Belair Networks Inc. System and method for zero intermediate frequency filtering of information communicated in wireless networks
US8583066B2 (en) 2006-04-07 2013-11-12 Belair Networks Inc. System and method for frequency offsetting of information communicated in MIMO-based wireless networks
US8280337B2 (en) 2006-04-07 2012-10-02 Belair Networks Inc. System and method for zero intermediate frequency filtering of information communicated in wireless networks
US8254865B2 (en) 2006-04-07 2012-08-28 Belair Networks System and method for frequency offsetting of information communicated in MIMO-based wireless networks
US9130613B2 (en) 2006-12-19 2015-09-08 Corning Optical Communications Wireless Ltd Distributed antenna system for MIMO technologies
US8873585B2 (en) 2006-12-19 2014-10-28 Corning Optical Communications Wireless Ltd Distributed antenna system for MIMO technologies
US9432095B2 (en) 2006-12-19 2016-08-30 Corning Optical Communications Wireless Ltd Distributed antenna system for MIMO technologies
US9461719B2 (en) 2006-12-19 2016-10-04 Corning Optical Communications Wirless Ltd Distributed antenna system for MIMO technologies
US7822148B2 (en) * 2007-02-12 2010-10-26 Mobile Access Networks Ltd. MIMO-adapted distributed antenna system
US20090154621A1 (en) * 2007-02-12 2009-06-18 Mobileaccess Networks Ltd. Mimo-adapted distributed antenna system
US9331736B2 (en) 2008-02-20 2016-05-03 Samsung Electronics Co., Ltd. Method and apparatus for processing signals at time division duplex transceiver
WO2009104856A1 (fr) * 2008-02-20 2009-08-27 Samsung Electronics Co,. Ltd. Procédé et dispositif pour traiter des signaux dans un émetteur-récepteur duplex en répartition dans le temps
US9173187B2 (en) 2008-03-31 2015-10-27 Golba Llc Determining the position of a mobile device using the characteristics of received signals and a reference database
US9366745B2 (en) 2008-03-31 2016-06-14 Golba Llc Methods and systems for determining the location of an electronic device using multi-tone frequency signals
US9829560B2 (en) 2008-03-31 2017-11-28 Golba Llc Determining the position of a mobile device using the characteristics of received signals and a reference database
GB2465404A (en) * 2008-11-18 2010-05-19 Iti Scotland Ltd Plural antenna elements with a switching arrangement and method
US9210683B2 (en) 2009-07-09 2015-12-08 Golba Llc Method and system for device positioning utilizing distributed transceivers with array processing
US8224267B2 (en) 2009-09-23 2012-07-17 Ambit Microsystems (Shanghai) Ltd. Radio frequency-based communication terminal having two exchangeable transmitting paths
US20110070846A1 (en) * 2009-09-23 2011-03-24 Ambit Microsystems (Shanghai) Ltd. Radio frequency-based communication terminal having two exchangeable transmitting paths
US9184962B2 (en) 2009-12-09 2015-11-10 Andrew Wireless Systems Gmbh Distributed antenna system for MIMO signals
US8396368B2 (en) 2009-12-09 2013-03-12 Andrew Llc Distributed antenna system for MIMO signals
US9246559B2 (en) 2009-12-09 2016-01-26 Andrew Wireless Systems Gmbh Distributed antenna system for MIMO signals
US20110135308A1 (en) * 2009-12-09 2011-06-09 Luigi Tarlazzi Distributed antenna system for mimo signals
US9787385B2 (en) 2009-12-09 2017-10-10 Andrew Wireless Systems Gmbh Distributed antenna system for MIMO signals
CN102137477A (zh) * 2010-01-22 2011-07-27 国基电子（上海）有限公司 移动台及其信号放大路径的选择方法
US20110183634A1 (en) * 2010-01-22 2011-07-28 Ambit Microsystems (Shanghai) Ltd. Mobile station and method to select an amplifying path thereof
US8301085B2 (en) 2010-01-22 2012-10-30 Ambit Microsystems (Shanghai) Ltd. Mobile station and method to select an amplifying path thereof
US20110201368A1 (en) * 2010-02-12 2011-08-18 Pier Faccin Distributed antenna system for mimo communications
US10644761B2 (en) 2010-02-12 2020-05-05 Andrew Wireless Systems Gmbh Distributed antenna system for MIMO communications
US9413439B2 (en) 2010-02-12 2016-08-09 Commscope Technologies Llc Distributed antenna system for MIMO communications
US8744504B2 (en) 2010-02-12 2014-06-03 Andrew Llc Distributed antenna system for MIMO communications
US9768840B2 (en) 2010-02-12 2017-09-19 Andrew Wireless Systems Gmbh Distributed antenna system for MIMO communications
US9918198B2 (en) 2010-08-06 2018-03-13 Golba Llc Method and system for device positioning utilizing distributed transceivers with array processing
US10491273B2 (en) 2010-10-01 2019-11-26 Commscope Technologies Llc Distributed antenna system for MIMO signals
US9979443B2 (en) 2010-10-01 2018-05-22 Commscope Technologies Llc Distributed antenna system for MIMO signals
US9231670B2 (en) 2010-10-01 2016-01-05 Commscope Technologies Llc Distributed antenna system for MIMO signals
US9602176B2 (en) 2010-10-01 2017-03-21 Commscope Technologies Llc Distributed antenna system for MIMO signals
US9014750B2 (en) 2011-01-13 2015-04-21 Nec Casio Mobile Communications, Ltd. Wireless communication device
US11128415B2 (en) 2011-10-17 2021-09-21 Golba Llc Method and system for a repeater network that utilizes distributed transceivers with array processing
US9660777B2 (en) 2011-10-17 2017-05-23 Golba Llc Method and system for utilizing multiplexing to increase throughput in a network of distributed transceivers with array processing
US10958389B2 (en) 2011-10-17 2021-03-23 Golba Llc Method and system for providing diversity in a network that utilizes distributed transceivers with array processing
US11075724B2 (en) 2011-10-17 2021-07-27 Golba Llc Method and system for a repeater network that utilizes distributed transceivers with array processing
US11075723B2 (en) 2011-10-17 2021-07-27 Golba Llc Method and system for MIMO transmission in a distributed transceiver network
US9438389B2 (en) 2011-10-17 2016-09-06 Golba Llc Method and system for centralized or distributed resource management in a distributed transceiver network
US11108512B2 (en) 2011-10-17 2021-08-31 Golba Llc Method and system for centralized or distributed resource management in a distributed transceiver network
US10873431B2 (en) 2011-10-17 2020-12-22 Golba Llc Method and system for utilizing multiplexing to increase throughput in a network of distributed transceivers with array processing
US9112648B2 (en) 2011-10-17 2015-08-18 Golba Llc Method and system for centralized distributed transceiver management
US10069608B2 (en) 2011-10-17 2018-09-04 Golba Llc Method and system for MIMO transmission in a distributed transceiver network
US9602257B2 (en) 2011-10-17 2017-03-21 Golba Llc Method and system for centralized distributed transceiver management
US10084576B2 (en) 2011-10-17 2018-09-25 Golba Llc Method and system for centralized or distributed resource management in a distributed transceiver network
US10581567B2 (en) 2011-10-17 2020-03-03 Golba Llc Method and system for high-throughput and low-power communication links in a distributed transceiver network
US10965411B2 (en) 2011-10-17 2021-03-30 Golba Llc Method and system for a repeater network that utilizes distributed transceivers with array processing
US9225482B2 (en) 2011-10-17 2015-12-29 Golba Llc Method and system for MIMO transmission in a distributed transceiver network
US9686060B2 (en) 2011-10-17 2017-06-20 Golba Llc Method and system for MIMO transmission in a distributed transceiver network
US20130095770A1 (en) * 2011-10-17 2013-04-18 Mehran Moshfeghi Method and system for high-throughput and low-power communication links in a distributed transceiver network
US9698948B2 (en) 2011-10-17 2017-07-04 Golba Llc Method and system for high-throughput and low-power communication links in a distributed transceiver network
US10284344B2 (en) 2011-10-17 2019-05-07 Golba Llc Method and system for centralized distributed transceiver management
US10277370B2 (en) 2011-10-17 2019-04-30 Golba Llc Method and system for utilizing multiplexing to increase throughput in a network of distributed transceivers with array processing
US11018816B2 (en) 2011-10-17 2021-05-25 Golba Llc Method and system for a repeater network that utilizes distributed transceivers with array processing
US9037094B2 (en) * 2011-10-17 2015-05-19 Golba Llc Method and system for high-throughput and low-power communication links in a distributed transceiver network
US10103853B2 (en) 2011-10-17 2018-10-16 Golba Llc Method and system for a repeater network that utilizes distributed transceivers with array processing
US20170338921A1 (en) 2011-10-17 2017-11-23 Golba Llc Method and system for high-throughput and low-power communication links in a distributed transceiver network
US11133903B2 (en) 2011-10-17 2021-09-28 Golba Llc Method and system for centralized distributed transceiver management
WO2013150346A1 (fr) * 2011-10-25 2013-10-10 Poynting Antennas (Pty) Limited Aide à la communication pour dispositif cellulaire d'utilisateur final
US9813127B2 (en) 2012-03-30 2017-11-07 Corning Optical Communications LLC Reducing location-dependent interference in distributed antenna systems operating in multiple-input, multiple-output (MIMO) configuration, and related components, systems, and methods
US9258052B2 (en) 2012-03-30 2016-02-09 Corning Optical Communications LLC Reducing location-dependent interference in distributed antenna systems operating in multiple-input, multiple-output (MIMO) configuration, and related components, systems, and methods
US9054429B2 (en) 2012-03-30 2015-06-09 Kabushiki Kaisha Toshiba Antenna apparatus and electronic device including antenna apparatus
US9680554B2 (en) 2012-08-08 2017-06-13 Golba Llc Method and system for distributed transceivers for distributed access points connectivity
US9197982B2 (en) 2012-08-08 2015-11-24 Golba Llc Method and system for distributed transceivers for distributed access points connectivity
US10020861B2 (en) 2012-08-08 2018-07-10 Golba Llc Method and system for distributed transceivers and mobile device connectivity
US9226092B2 (en) 2012-08-08 2015-12-29 Golba Llc Method and system for a distributed configurable transceiver architecture and implementation
US10615863B2 (en) 2012-08-08 2020-04-07 Golba Llc Method and system for distributed transceivers for distributed access points connectivity
US9923620B2 (en) 2012-08-08 2018-03-20 Golba Llc Method and system for a distributed configurable transceiver architecture and implementation
US10608727B2 (en) 2012-08-08 2020-03-31 Golba Llc Method and system for a distributed configurable transceiver architecture and implementation
US9548805B2 (en) 2012-08-08 2017-01-17 Golba Llc Method and system for optimizing communication in leaky wave distributed transceiver environments
US10735079B2 (en) 2012-08-08 2020-08-04 Golba Llc Method and system for distributed transceivers and mobile device connectivity
US10277299B2 (en) 2012-08-08 2019-04-30 Golba Llc Method and system for optimizing communication using reflectors in distributed transceiver environments
US9253587B2 (en) 2012-08-08 2016-02-02 Golba Llc Method and system for intelligently controlling propagation environments in distributed transceiver communications
US11128367B2 (en) 2012-08-08 2021-09-21 Golba Llc Method and system for optimizing communication in leaky wave distributed transceiver environments
US20170317734A1 (en) 2012-08-08 2017-11-02 Golba Llc Method and system for distributed transceivers for distributed access points connectivity
US9531452B2 (en) 2012-11-29 2016-12-27 Corning Optical Communications LLC Hybrid intra-cell / inter-cell remote unit antenna bonding in multiple-input, multiple-output (MIMO) distributed antenna systems (DASs)
US9907114B2 (en) * 2013-03-14 2018-02-27 Qualcomm Incorporated Devices, systems, and methods implementing a front end partition of a wireless modem
US20140269650A1 (en) * 2013-03-14 2014-09-18 Qualcomm Incorporated Devices, systems, and methods implementing a front end partition of a wireless modem
US20150117421A1 (en) * 2013-10-31 2015-04-30 Samsung Electro-Mechanics Co., Ltd. Adaptive dual band mimo wi-fi apparatus, and operating method thereof
US9350422B2 (en) * 2014-02-27 2016-05-24 Denso Corporation Communication system, communication slave and communication master
US20150244420A1 (en) * 2014-02-27 2015-08-27 Denso Corporation Communication system, communication slave and communication master
US10256879B2 (en) 2014-07-30 2019-04-09 Corning Incorporated Reducing location-dependent destructive interference in distributed antenna systems (DASS) operating in multiple-input, multiple-output (MIMO) configuration, and related components, systems, and methods
US9525472B2 (en) 2014-07-30 2016-12-20 Corning Incorporated Reducing location-dependent destructive interference in distributed antenna systems (DASS) operating in multiple-input, multiple-output (MIMO) configuration, and related components, systems, and methods
US9929786B2 (en) 2014-07-30 2018-03-27 Corning Incorporated Reducing location-dependent destructive interference in distributed antenna systems (DASS) operating in multiple-input, multiple-output (MIMO) configuration, and related components, systems, and methods
US10135561B2 (en) 2014-12-11 2018-11-20 Corning Optical Communications Wireless Ltd Multiplexing two separate optical links with the same wavelength using asymmetric combining and splitting
US9729267B2 (en) 2014-12-11 2017-08-08 Corning Optical Communications Wireless Ltd Multiplexing two separate optical links with the same wavelength using asymmetric combining and splitting
US11303346B2 (en) 2015-08-25 2022-04-12 Cellium Technologies, Ltd. Systems and methods for transporting signals inside vehicles
US11637612B2 (en) 2015-08-25 2023-04-25 Cellium Technologies, Ltd. Macro-diversity using hybrid transmissions via twisted pairs
US11870532B2 (en) 2015-08-25 2024-01-09 Cellium Technologies, Ltd. Spatial multiplexing via twisted pairs
US10148336B2 (en) * 2015-08-25 2018-12-04 Cellium Technologies, Ltd. Systems and methods for using spatial multiplexing in conjunction with a multi-conductor cable
US20170099608A1 (en) * 2015-10-06 2017-04-06 Skyworks Solutions, Inc. Front end system with lossy transmission line between front end module and transceiver
US10111115B2 (en) * 2015-10-06 2018-10-23 Skyworks Solutions, Inc. Front end system with lossy transmission line between front end module and transceiver
US9647752B2 (en) 2015-10-13 2017-05-09 Telefonaktiebolaget Lm Ericsson (Publ) Antenna switch control method for analog radio over fiber systems
CN105827258A (zh) * 2016-05-09 2016-08-03 中国电子科技集团公司第三十八研究所 一种多路接收系统
EP3331316A1 (fr) * 2016-11-30 2018-06-06 Nxp B.V. Compensation d'antenne à distance
US10021652B2 (en) 2016-11-30 2018-07-10 Nxp B.V. Remote antenna compensation
US10721634B2 (en) 2017-05-30 2020-07-21 Movandi Corporation Non-line-of-sight (NLOS) coverage for millimeter wave communication
US10484078B2 (en) 2017-07-11 2019-11-19 Movandi Corporation Reconfigurable and modular active repeater device
US20190020401A1 (en) 2017-07-11 2019-01-17 Movandi Corporation Reconfigurable and modular active repeater device
US11018752B2 (en) 2017-07-11 2021-05-25 Silicon Valley Bank Reconfigurable and modular active repeater device
EP3477873A1 (fr) * 2017-10-25 2019-05-01 Samsung Electronics Co., Ltd. Dispositif électronique comprenant une pluralité d'antennes et son procédé de fonctionnement
US11082094B2 (en) 2017-10-25 2021-08-03 Samsung Electronics Co., Ltd. Electronic device including plurality of antennas and method of operating same
CN109713425A (zh) * 2017-10-25 2019-05-03 三星电子株式会社 包括多个天线的电子装置及其操作方法
US10587313B2 (en) 2017-12-07 2020-03-10 Movandi Corporation Optimized multi-beam antenna array network with an extended radio frequency range
US20190181560A1 (en) 2017-12-08 2019-06-13 Movandi Corporation Signal Cancellation in Radio Frequency (RF) Device Network
US10862559B2 (en) 2017-12-08 2020-12-08 Movandi Corporation Signal cancellation in radio frequency (RF) device network
US10666326B2 (en) 2017-12-08 2020-05-26 Movandi Corporation Controlled power transmission in radio frequency (RF) device network
US11088457B2 (en) 2018-02-26 2021-08-10 Silicon Valley Bank Waveguide antenna element based beam forming phased array antenna system for millimeter wave communication
US11108167B2 (en) 2018-02-26 2021-08-31 Silicon Valley Bank Waveguide antenna element-based beam forming phased array antenna system for millimeter wave communication
US10637159B2 (en) 2018-02-26 2020-04-28 Movandi Corporation Waveguide antenna element-based beam forming phased array antenna system for millimeter wave communication
WO2020080888A1 (fr) 2018-10-18 2020-04-23 Samsung Electronics Co., Ltd. Dispositif électronique et procédé d'émission d'un signal de référence de liaison montante
US11405069B2 (en) 2018-10-18 2022-08-02 Samsung Electronics Co., Ltd. Electronic device and method for transmitting uplink reference signal
EP3834289A4 (fr) * 2018-10-18 2022-01-05 Samsung Electronics Co., Ltd. Dispositif électronique et procédé d'émission d'un signal de référence de liaison montante
US11757484B2 (en) 2019-03-22 2023-09-12 Vivo Mobile Communication Co., Ltd. Radio frequency front-end circuit and mobile terminal
TWI789672B (zh) * 2020-02-03 2023-01-11 仁寶電腦工業股份有限公司 信號傳輸裝置與電纜連接電路

Also Published As

Publication number Publication date
JP2008516527A (ja) 2008-05-15
WO2006041652A3 (fr) 2006-05-26
JP2013048429A (ja) 2013-03-07
CN101124737A (zh) 2008-02-13
WO2006041652A2 (fr) 2006-04-20
US20090124214A1 (en) 2009-05-14
EP1800411B1 (fr) 2012-11-07
CN101124737B (zh) 2012-07-18
EP1800411A2 (fr) 2007-06-27
JP2010193462A (ja) 2010-09-02
US8509708B2 (en) 2013-08-13

Similar Documents

Publication Publication Date Title
US8509708B2 (en) Remote front-end for a multi-antenna station
US6671519B2 (en) RF block of mobile communication base station
CN110943757B (zh) 射频电路及电子设备
EP0506443B1 (fr) Amplificateur de puissance dans une automobile pour connexion enfichable avec un téléphone mobile
US20060035618A1 (en) Wireless data communication device
CN100417036C (zh) 时分双工无线通信系统收发信机
EP4220975A1 (fr) Dispositif d'émission-réception de signal, dispositif d'amplification de signal, et procédé de fonctionnement d'un système de communication
US6466613B1 (en) Communications transceiver utilizing a single filter
JP5264709B2 (ja) 周波数変換変調データ・クランプ
CN206611510U (zh) 用于处理MoCA信号的信号放大装置
HK1112781A (en) Remote front-end for a multi-antenna station
US11394411B2 (en) Transmitting/receiving system for radio signals having an integrated transmission amplifier protection function
KR101401835B1 (ko) Ｆｓｋ 수신기의 주파수 제한 증폭기
US12494815B2 (en) Signal transceiving device, signal amplification device, and operation method of communication system
CN117639834B (zh) 天线电路、obu设备
CN222053062U (zh) 射频电路和终端设备
CN117498888B (zh) 一种器件复用的射频收发电路及其控制方法
CN213846842U (zh) 卫星下变频器
CN101132221A (zh) 时分复用选频方法和电路以及时分同步码分多址直放站
US20020155863A1 (en) Transmitter/receiver device with re-configurable output combining
KR100790655B1 (ko) Ｗｉｍａｘ 통신 시스템용 ｒｆ 주파수 변환기
CN117394885A (zh) 用于车辆的单电缆无线电天线系统
Freese et al. CAN bus based TM/TC interface for microwave power modules in satcom payloads
EP1625657A2 (fr) Distribution de signaux radioelectriques dans un circuit electronique
KR20020014260A (ko) 티디디 방식을 이용한 씨디엠에이 이동통신 시스템의 이동단말장치

Legal Events

Date Code Title Description
AS Assignment

Owner name: QUALCOMM INCORPORATED, CALIFORNIA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:ZHANG, XIANGDONG;WALTON, JAY RODNEY;REEL/FRAME:016850/0694

Effective date: 20050718

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION