Repeater techniques for multiple input multiple output utilizing beam formers

Related application

This application is in connection with the pending US Provisional Application No. 160 / 854,424 filed October 26, 2006 and claims priority from that application. The entire contents of the application are incorporated herein by reference. This application is entitled "WIRELESS LOCAL AREA NETWORK REPEATER" by Proctor et al., US Patent Application Publication No. 2005-0286448 (US Patent Application No. 10 / 516,327), and "PHYSICAL LAYER REPEATER CONFIGURATION FOR INCREASING MIMO PERFORMANCE" by Proctor et al. Titled US Patent Application Publication No. 2006-0193271 (US Patent Application No. 11 / 340,838), and Gainey et al., "DIRECTIONAL ANTENNA CONFIGURATION FOR TDD" A partial continuation (CIP) of U.S. Patent Application Publication No. 2007-0117514 (U.S. Patent Application No. 11 / 602,455) entitled "REPEATER", the entire contents of which are incorporated herein by reference. Is done. This application is US Pat. No. 7,200,134 entitled "WIRELESS AREA NETWORK USING FREQUENCY TRANSLATION AND RETRANSMISSION BASED ON MODIFIED PROTOCOL MESSAGES FOR ENHANCING NETWORK COVERAGE" by Proctor et al. US Patent Application Publication No. 2006-0195883 entitled "AND DELAY GENERATION" (US Patent Application No. 11 / 340,860, and "REPEATER HAVING DUAL RECEIVER" by Proctor et al. In connection with PCT patent application PCT / US07 / 19163, filed August 31, 2007, entitled "OR TRANSMITTER ANTENNA CONFIGURATION WITH ADAPTATION FOR INCREASED ISOLATION", all content of this application is incorporated herein by reference. Is done.

The technical field generally relates to wireless communications, and in particular to repeaters for improving coverage of wireless networks.

Traditionally, for example, time division duplex (TDD), frequency division duplex (FDD) wireless fidelity (Wi-Fi), Worldwide Interoperability for Microwave Access (Wi-max), cellular, global mobile communication system (GSM), code division. The coverage area of wireless communication networks, such as multi-connection (CDMA) 3G-based wireless networks, can be expanded by repeaters. Illustrative repeaters include, for example, frequency conversion repeaters, or any frequency repeaters operating at the physical layer or data link layer as defined by the Open Systems Interconnection Basic Reference Model (OSI Model). ..

Generally, a physical layer repeater designed to operate within a TDD-based wireless network, such as Wi-max, includes an antenna module and a repeater circuit for simultaneously sending and receiving TDD packets. Preferably, the antenna for reception and transmission and the repeater circuit are included in the same package in order to reduce the product cost, facilitate the introduction, and the like. This is especially true for small office-based equipment, where form factor and ease of deployment are critical considerations, and repeaters intended for use by consumers such as residents. Usually, in such a device, one antenna or set of antennas faces, for example, another set of antennas or antennas pointing towards a base station, access point, gateway, or subscriber device.

For any repeater that receives and transmits at the same time, the separation between the receiving and transmitting antennas is an important factor in the overall performance of the repeater. This is true regardless of whether it is relaying to the same frequency or to a different frequency. That is, if the receiver and transmitter antennas are not properly separated, the performance of the repeater can be significantly degraded. In general, the gain of the repeater cannot be as great as the separation to prevent repeater oscillation or initial desensitization. Separation is generally achieved by physical separation, antenna pattern, or polarization. In frequency conversion repeaters, additional isolation can be achieved by utilizing bandpass filtering, but antenna isolation is generally received from the transmitter, with unwanted noise and within the frequency band range of the receiving antenna. Against the background of out-of-band radiation, it remains a limiting factor in repeater performance. Antenna separation from the receiver to the transmitter is even more serious, as the repeaters operate at the same frequency and bandpass filtering does not provide further separation.

The same problem is that the receive and transmit channels are separated using frequency detection and frequency conversion methods, converting packets associated with one device in the first frequency channel to the second frequency channel used by the second device. By doing so, it relates to a frequency conversion repeater that allows two wireless local area network (WLAN) IEEE 802.11 units to communicate. The frequency conversion repeater monitors both channels for transmission, and when transmission is detected, it is configured to convert the received signal on the first frequency to the other channel and transmit it on the second frequency. be able to. If the power level from the transmitter incident on the receiver front end is too high, it can result in the problem of causing cross-modulation distortion, resulting in so-called "spectral re-growth". In some cases, cross-modulation distortion may occur within the desired received signal band, resulting in a jamming effect or desensitization of the receiver. This effectively reduces the separation achieved by frequency conversion and filtering.

In addition, in WLAN environments that utilize the proposed IEEE 802.11n standard protocol, wireless devices utilize multipath transmission to increase data rates and ranges. However, in a typical home WLAN environment, multipath transmission performance and spatial diversity are limited by many of the same reasons explained above in relation to the lack of performance of wireless products in home or indoor environments.

Considering the above problems, the repeater according to the first aspect includes diversity technology for improving multipath transmission capability and spatial diversity for a typical home WLAN environment. The repeater includes first and second dipole antennas connected to the first and second transmitters and first and second patch antennas connected to the first and second receivers. Is possible. The transmitter and receiver may be configured to increase separation between the two based on the transmitted signal measured at the receiver, such as a self-generated signal.

Known isolated transmit or receive weights for a particular receiver diversity selection may be optimized to achieve higher isolation. In addition, the transmit or receive weighting device may apply multiple weights to allow for optimization of multi-input multi-output (MIMO) signal streams (referred to here as paths) received at different angles of arrival. .. The weighted signal is a signal mainly received from the first beamforming reception pattern, transmitted as the first transmitting beamforming antenna pattern, and any additional signal simultaneously received by the other receiving beamforming patterns. , May be synthesized and transmitted so that they are simultaneously transmitted out of the other transmitter antenna pattern by transmitter beamforming. The receiver and / or transmitter pattern is further optimized according to the network traffic signal based on the orthogonal level calculated between the signals received for each beam pattern and / or the MIMO signaling received from the transmitting station. You may.

The repeater according to the second aspect includes a dual receiver / transmitter configuration using multiplexing techniques with spectral inversion to improve separation between the transmitter and receiver. For each of the two receivers, the I channels may be added together and the Q channel may be subtracted to provide a quadrature IF to invert the spectrum for one of the two received signals. Synthetic IQ channels are then digitized and separated back into their elemental signals by digital processing, including frequency shifting and filtering.

The repeater according to the first or second aspect may further include a synthesizer and a digital frequency generator to control the weighting applied to the transmitted and received signals.

A repeater according to a third aspect, the repeater may include a data port available to a client device to allow dual use of a processor with a customer-specific application.

The repeater according to the fourth aspect is a multi-channel radio frequency (RF) repeater that uses wideband analog-to-digital conversion (ADC) and digital-to-analog conversion (DAC).

In the accompanying drawings, the same reference number refers to elements that are consistently the same or functionally similar throughout the separate drawings, which drawings are incorporated herein by part with the following detailed description. And make it up. The drawings serve to further illustrate the various embodiments and to illustrate the various principles and advantages according to the present invention.<figref num="1">Block diagram of the internal components of an exemplary repeater according to various exemplary embodiments</figref><figref num="2">Block diagram of internal and external components of the illustrated repeater</figref><figref num="3">A table showing exemplary gain requirements for analog-to-digital converters (ADCs) for exemplary repeaters.</figref><figref num="4">A table showing exemplary gain requirements for a digital-to-analog converter (DAC) for an exemplary repeater.</figref><figref num="5A">Diagram showing an exemplary enclosure for a dipole dual patch antenna configuration</figref><figref num="5B">Figure 5A showing an internal view of the enclosure</figref><figref num="5C">Block diagram of test equipment used to test transmitter-based adaptive antenna configurations</figref><figref num="5D">Diagram showing an exemplary dual dipole dual patch antenna configuration</figref><figref num="6A">Graph showing gain vs. frequency and phase shift vs. frequency for antennas with and without adaptation</figref><figref num="6B">Graph showing gain vs. frequency and phase shift vs. frequency for antennas with and without adaptation</figref><figref num="7">Block diagram of a receiver-based adaptive antenna configuration according to various exemplary embodiments</figref><figref num="8">Functional block diagram of an exemplary repeater</figref><figref num="9">Block diagram of dual receiver / down converter</figref><figref num="10">Block diagram of digital signal processing</figref><figref num="11">Block diagram of dual transmitters</figref><figref num="12">Diagram showing signal processing for the various channels performed by the repeater</figref><figref num="13">Diagram showing signal processing for the various channels performed by the repeater</figref><figref num="14">Diagram showing signal processing for the various channels performed by the repeater</figref><figref num="15">Diagram showing signal processing for the various channels performed by the repeater</figref><figref num="16">Diagram showing signal processing for the various channels performed by the repeater</figref><figref num="17">Diagram showing signal processing for the various channels performed by the repeater</figref><figref num="18">Example of simulation results of baseband signal recovery from synthetic IF signal</figref><figref num="19">Example of Illustrated Received Signal Synthesis</figref><figref num="20">Block diagram of an exemplary signal synthesizer</figref><figref num="21">Block diagram of repeater components including associated component delays</figref><figref num="22">Example of operation timing diagram of an example of a repeater</figref><figref num="23">Example of an exemplary frequency plan during received signal processing</figref><figref num="24">Block diagram of low-oscillation synthesizer</figref><figref num="25">Block diagram of a low-oscillation (LO) synthesizer for an exemplary repeater</figref><figref num="26">Block diagram of the analog dual complex multiplier for the LO synthesizer shown in Figure 25</figref><figref num="27">Block diagram of low frequency synthesizer</figref><figref num="28">Examples of low frequency synthesizer frequency spreads for various polar configurations</figref><figref num="29">Examples of low frequency synthesizer frequency spreads for various polar configurations</figref><figref num="30">Examples of low frequency synthesizer frequency spreads for various polar configurations</figref><figref num="31">Examples of low frequency synthesizer frequency spreads for various polar configurations</figref><figref num="32">Examples of low frequency synthesizer frequency spreads for various polar configurations</figref><figref num="33">Examples of low frequency synthesizer frequency spreads for various polar configurations</figref><figref num="34">Examples of frequency spreads for frequency synthesizer-related technologies</figref><figref num="35">Example of frequency spread for the frequency synthesizer</figref><figref num="36">Example of mixer output of a frequency synthesizer before and after the limit</figref><figref num="37">Examples of signal levels and noise with respect to the receiver of the illustrated repeater</figref><figref num="38">Examples of adjustable gain control (AGC) characteristics</figref><figref num="39">Noise pedestal example</figref>

The repeater 10 will be described according to various novel embodiments with reference to the block diagram of FIG. The repeater 10 includes a dual receiver / downconverter 20 connected to an intermediate frequency (IF) multiplexer 25, a synthesizer or linear oscillator (LO) 30 for generating LO signals, a dual transmitter / upconverter 35, and signal detection. The device 40 and the demodulation processing modulation device 45 may be included. The repeater 10 may also include a channel synthesizer and may include a dual receiver / down converter 20'connected to a digital filter and an adjustable gain control (AGC) device. As shown in the block diagram of FIG. 2, the repeater 10 may include a dipole antenna as a transmitting antenna and a patch antenna as a receiving antenna.

Returning to FIG. 1, the dual receiver / down converter 20 includes an analog-to-digital converter (ADC), and the dual transmitter / up converter 35 includes a digital / analog converter (DAC). Illustrated gain requirements for ADCs and DACs are shown in Figures 3 and 4.

With reference to FIGS. 5A-5B, the repeater 10 may include a dipole dual patch antenna configuration that is efficiently housed with the repeater electronics in a compact enclosure 100. Each of the patch antennas 114 and 115 may be arranged parallel to the ground plane 113 and may be composed of a metal portion printed on a distribution frame or the like, embedded in a plastic housing and stamped.

With reference to FIG. 5C, the repeater may include an exemplary dual dipole dual patch antenna configuration 200, including first and second patch antennas 202, 204 separated by PCB 206 for repeater electronics.

The inventors have conducted several tests demonstrating the higher separation achieved by the adaptive antenna configuration. FIG. 5D is a block diagram of the test adaptive antenna configuration used to test the separation achieved by an antenna configuration similar to that shown in FIG. 5B. Figure 6-Refer to Figure 7, a dipole patch array without weighting circuit (no adaptation) and a dipole with weighting circuit in a location where some signal scattering objects are physically close to the antenna array 504. For the patch array (with adaptation), path loss was measured at 2.36 GHz (marker 1) and 2.40 GHz (marker 2). The results show that adjusting the phase and gain settings provides significant substantial isolation control at a particular frequency. In particular, marker 1 in Figure 6A is when adaptation is not applied.^-It shows an S21 pass loss of 45 dB, but marker 1 in Figure 6B is after variable phase and gain tuning.^-It shows a path loss of 71 dB. The result is an additional separation gain of 26 dB. If adaptation is not applied, marker 2 in Figure 6A is^-It shows an S21 pass loss of 47 dB, but marker 2 in Figure 6B shows after variable phase and gain tuning.^-It shows a path loss of 57 dB. The result is an additional separation gain of 10 dB.

A receiver-based adaptive antenna configuration 400 for achieving isolation will be briefly described with reference to FIG. The configuration 400 synthesizes signals A, B on paths 406,408 so that the first and second patch antennas 402,404 and the first and second receivers 416,418 receive different algebraic composite signals A, B. Includes 90 ° hybrid directional coupler 410. The outputs of the first and second receivers 416,418 are connected to a baseband processing module 420 for synthesizing signals to perform beamforming steps in the digital baseband. The first receiver 416 and the second receiver 418 are tuned to different frequencies until a signal is detected on one of the two frequencies, and then another receiver is readjusted to the detected frequency. May be done. The first and second receivers 416 and 418 then have weights digitally applied by the baseband processing module 420 and are capable of performing receiver antenna adaptation. The weighting determination may be achieved by calculating the "beam-formed" or weighted composite signal in multiple composites at the same time and selecting the best composite in the set of composites. This may be implemented as a Fast Fourier Transform, a Butler matrix of discrete weighted sets, or other techniques for producing a set of synthetic outputs and selecting the "best" from those outputs. It may be implemented. The "best" may be based on signal strength, signal-to-noise ratio (SNR), delay spread or other quality metric. Alternatively, the calculation of the "beam-formed" or weight-synthesized signal may be performed sequentially. In addition, synthesis may be performed at any weighting ratio (gain and phase, equalization) so that the best synthesis of signals A, B from the first and second patch antennas 402,404 is used.

Various embodiments of the repeater 800 will be described with reference to FIG. The repeater 800 includes a dual receiver / down converter 802, a digital signal processing module 804, a dual transmitter 806, an LO and a reference synthesizer 808.

The dual receiver / down converter 802 includes first and second receiving antennas connected to first and second low noise amplifiers (LNAs) to amplify the received signal, respectively. The first and second receiving antennas may be, for example, patch antennas. The output of the LNA is connected to a hybrid coupler that may be configured similar to the hybrid coupler 410 shown in FIG. The hybrid coupler is connected to the first and second downconverters, and their outputs are connected to the IF multiplexer.

Digital signal processing module 804 includes first and second ADCs that receive the output of the IF multiplexer. The outputs of the first and second ADCs are connected to downconverters and demultiplexers, and the outputs are connected to a synthesizer (COMBINE CHANNELS) for synthesizing channels. The digital filter filters the output signal of the synthesizer. Adjustable gain control (AGC) also adjusts the signal gain. The digital signal processing module 804 includes a signal detection circuit for detecting the presence of a signal on the receive channel, an AGC metric for determining parameters for gain adjustment, and a main control processor. The signal from the AGC is output to a weight element and a DEMODULATE PROCESS MODULATE for modulation or demodulation execution of any required signal. The weight element may be an analog element or a digital element. The weight element is connected to the up-conversion circuit and its output is connected to the first and second transmitters of the dual transmitter 806 via the first and second DACs.

The first and second transmitters of the dual transmitter 806 are connected to the first and second transmitting antennas via the first and second power amplifiers. The first and second transmitting antennas may be, for example, dipole antennas.

The LO and reference synthesizer 808 includes a reference oscillator, a fixed reference and LO generator, a baseband synthesizer, and a variable LO generator to generate the LO used by the receiver and transmitter.

The dual receiver / down converter is shown in more detail in Figure 9. The downconverter includes several mixers that are connected to the synthesizer 808 with the output passing through a bandpass filter (BPF).

The digital signal processing module 804 is shown in more detail in FIG. The AGC and weight control units can control the complex weights connected to the vector modulator.

The dual transmitter / upconverter is shown in more detail in Figure 11. The upconverter includes several mixers that are connected to the synthesizer 808 with the output passing through the BPF.

The signal processing operations of IF multiplexers, ADCs and digital downconverters are shown in Figures 12-17 for various scenarios in which signals are received on the first and second channels. With reference to FIG. 18, the simulation results showed the desired baseband signal recovery from the synthetic IF signal generated by the IF multiplexer.

Referring to FIG. 19, an exemplary received signal synthesis performed by a hybrid coupler and synthesizer is shown. The hybrid coupler (reception weighting circuit) applies the first and second weights to the received signals Ra, Rb received for the first and second receive paths connected to the first and second receive antennas, respectively. It is possible. The signal synthesizer synthesizes the first and second weighted reception signals according to various mathematical synthesiss to generate a plurality of combined reception signals (So1, So2, So3, So4). The best one (So) of the combined received signal is output.

The signal synthesizer is shown in more detail in FIG. The signal synthesizer stores a first sample of the received signal received by the first receiving antenna and a second sample of the received signal received by the second receiving antenna, and follows a switch in the digital filter. It can be configured to load one sample or one of the second samples. The switch can be controlled by the signal detector based on one of a first receive antenna and a second receive antenna for which the signal detector has detected the presence of a received signal.

Metrics such as beacons transmitted by repeaters during normal operation can be used to determine weight values. For example, in a frequency conversion repeater that operates on two frequency channels, the receiver can measure the strength of the received signal on one channel while the two transmitting antennas transmit a self-generated signal such as a beacon. It is possible. The initial amount of transmitter-to-receiver separation can be determined during self-generated transmission. Weights are like a steep descent, or LMS algorithm, to minimize (increase the separation) the coupling between the transmitter and the receiver based on the initial separation from the transmitter to the receiver. Several known minimization adaptive algorithms, such as statistical gradient-based algorithms, can be used to coordinate between subsequent transmissions. Other traditional adaptive algorithms may be used that adjust specific parameters (referred to here as weights) to minimize derived metrics.

With reference to FIG. 21, the delay of each of the repeater components is shown. The total amount of delay is approximately 600 nanoseconds. The delay is clearly dependent on the filter. If the IF BPF is assumed to be a (high loss) SAW with a delay of 150 nanoseconds, the overall delay can be reduced by as much as 100 nanoseconds by eliminating this SAW. A detector filter is a long FIR filter that provides virtually all adjacent channel rejection with respect to the detector. When operating at a BW of 20MHz, a SAW with a BW of 40MHz has no delay. Baseband FIR filters have significant delays because they must reject adjacent channel interference and provide linear phase (or correct for the phase nonlinearity of the pre-filter). However, this delay can be reduced by preloading the filter with a sample containing the signal after it has been detected. The delay is therefore not included in the delay amount.

Reference to FIG. 22 shows the timing behavior for each sample iteration. The start time t = 0 is defined as when the first symbol of the packet preamble (in the received signal) arrives at the first IF of receiver A. At t = 250 nanoseconds, the first symbol exits the ADC and enters the detector filter and detector. Packets are detected at t = 450 nanoseconds. Also at that time, receiver B was listening for packets on different WIFI frequency channels, but did not receive anything (in this example). When receiver A detected the signal, receiver B was switched to the same WIFI channel as receiver A so that both receivers would receive the signal through different paths. A control circuit (not shown) may be connected to the signal detector, receiver or antenna to switch frequencies according to detection by the signal detector.

At t = 700, the signal on receiver B exits the ADC. The ADC outputs from both receivers are connected to the synthesizer. The signal from receiver A arrives at t = 250 nanoseconds, and the signal from receiver B arrives after t = 700 nanoseconds. This is not because the signal from receiver B is slow, but because receiver B has been tuned to an "inappropriate" channel. The synthesizer contains two memories that store a 150 nanosecond sample at the end of the signal from receiver A and a 150 nanosecond sample at the end of the signal from receiver B. If a detection hit occurs, the synthesizer immediately loads the stored sample from the appropriate receiver (receiver A in this case) into the digital filter. It then begins to output samples from receiver A between t = 450 nanoseconds and t = 475 nanoseconds.

At t = 700 nanoseconds, the signal from receiver B arrives. The synthesizer begins the process of selecting the best one in some input signal synthesis, and the best synthesis is selected at t = 900 nanoseconds. The amplitude of the composite signal is adjusted to match that of the signal from receiver A. The synthesized signal is used in place of the signal from receiver A and is output to the digital filter.

Digital filter output is started (shortly after detection) at t = 475 nanoseconds. It consists of a stored 150 nanosecond sample of the signal from receiver A and the current 400 nanosecond sample of signal A, followed by a sample of the synthetic signal. This digital filter output is regulated by the AGC to obtain a constant output at the transmitting antenna of approximately 20dbm samples of the signal at the time of the digital filter output. The samples are averaged to generate an AGC control voltage. The averaging initially begins with the averaging of the stored samples, and the process continues as more samples are added to the averaging. Ultimately, the signal at the transmitting antenna is the digital filter output delayed by the delay of the DAC and transmitter. It starts with t = 575 nanoseconds.

Generally, at t = 0, the first symbol of the WIFI packet arrives at the Rx antenna, and at t &lt;= 575 nanoseconds, the transmit signal exits the transmit antenna. The Tx signal is initially not a perfect replica of the Rx signal, but it closely replicates the signal. In addition, the Tx signal improves over time (signal synthesis improves SNR, and AGC time averaging is longer).

An exemplary frequency plan for sample repetition is shown in FIG. There is no self-interference in the frequency plan for the first order products and signals on the wiring.

An exemplary low-oscillation synthesizer will be described with reference to FIG. 25 for an exemplary repeater. Compared to the synthesizer-related techniques shown in FIG. 24, the synthesizer according to this embodiment includes an analog dual complex multiplier as detailed in FIG.

The synthesizer utilizes a single fixed frequency synthesizer to generate a variable LO by finding the product of two or more signals obtained by dividing by a fixed synthesizer using a divider. The divider is integer-based and multiplies between multiple divider signals to generate a new frequency. The frequency divider may be adjustable or programmable so that the multiplication result frequency is adjusted.

Synthesizers can obtain multiple LOs at different frequencies. A bandpass filter followed by a limiter may be utilized to suppress undesired multiplication (mixing) results. The LO is obtained by synthesizing multiple divided frequencies to allow manipulation of the residual spurious signal in the final LO.

Referring to FIG. 27, an exemplary configuration is shown for a low frequency synthesizer. The frequency spreads of low frequency synthesizers for various polar configurations are shown in Figures 28-33 and 35. For comparison, the frequency spreads of low frequency synthesizer related technologies are shown in Figure 34. FIG. 36 shows the synthesizer frequency spread before and after the limit.

With reference to FIG. 37, signal levels, noise, and transmission leaks are shown for receivers and transmitters. The AGC characteristics are shown in Figure 38. The noise pedestal is shown in Figure 39.

According to some embodiments, the plurality of antenna modules is a plurality of directional antennas or a pair of antennas as described above, for example, a plurality of omni-antennas or quasi-omni-antennas used in a MIMO environment or system, in the same repeater or device. Can be configured as. These same antenna technologies may be used in multiple frequency repeaters, such as FDD-based systems, where the downlink is on one frequency and the uplink is on another frequency.

Accordingly, the present disclosure relates to repeaters for wireless communication networks. The repeater is connected to the first and second transmitting antennas for receiving multiple multi-input multi-output (MIMO) signal streams on different paths, for example as shown in FIG. Includes receivers and first and second transmitters connected to first and second receiving antennas. The repeater synthesizes a plurality of MIMO signal streams according to various mathematical compositions, and applies a weight to each of the signal synthesizer for generating the plurality of synthesized MIMO signal streams and the plurality of MIMO signal streams. It further includes a weighting circuit for generating multiple weighted MIMO signal streams and a digital processor for determining the dominant signal stream in the weighted MIMO signal stream. The dominant signal stream may be transmitted at the first transmitting antenna and the remaining MIMO-weighted signal stream may be transmitted at the second transmitting antenna.

Digital processors can determine the dominant signal stream based on at least one of signal strength, signal-to-noise ratio, and delay spread.

The present disclosure is intended to illustrate the shaping and use of various embodiments according to the invention, rather than to limit the true, intended, and impartial scope and spirit of the invention. The above description is not intended to be comprehensive and is not intended to limit the invention to the exact form disclosed. Modifications or changes are possible in the light of the above teachings. The embodiments are adapted to provide the best description of the principles of the invention and its practical application, and to those skilled in the art in various embodiments and for the individual uses intended. Various modifications have been made and described to make it possible to utilize the present invention. All such modifications and modifications are within the scope of the present invention. The various circuits described above can be implemented in individual or integrated circuits. Further, multiple parts of the invention can be implemented in software or the like as understood by those skilled in the art, and are embodied as methods associated with the content described herein. be able to. [Additional Notes] (1) A first receiving antenna for receiving a received signal for the first path from either an access point, another repeater, or a radio station device, A second receiving antenna for receiving the received signal for a second path from either the access point, the other repeater, or the radio station apparatus. A reception weighting circuit for applying the first and second weights to the received signals received for the first and second paths to generate a first weighted signal and a second weighted signal, and A signal synthesizer for synthesizing the first and second weighted reception signals according to various mathematical compositions to generate a plurality of composite reception signals, and Relay for a wireless communication network comprising a transmit signal corresponding to any of the combined receive signals to the access point, the other repeater, or a transmit antenna for transmitting to any of the radio station devices. vessel. (2) The first receiving antenna is initially set to receive the received signal for the first path through the first frequency channel, and the second receiving antenna is the second through the second frequency channel. The repeater of (1) initially set to receive the received signal for the path of. (3) It is connected to the first receiving antenna and the second receiving antenna, and is configured to detect the presence of the received signal for any of the first receiving antenna and the second receiving antenna. Signal detector and Connected to the signal detector and the first and second receiving antennas, the first receiving antenna is switched to receive the received signal on the second frequency channel, or according to the detection of the signal detector. The repeater according to (2), further comprising a control circuit configured to switch the second receiving antenna in order to receive the received signal on the first frequency channel. (4) A digital filter for filtering any of the combined received signals is further provided. The signal synthesizer stores a first sample of the received signal received by the first receiving antenna and a second sample of the received signal received by the second receiving antenna, and detects the signal. To load either the first sample or the second sample into the digital filter according to either the first receiving antenna or the second receiving antenna on which the device has detected the presence of the received signal. Consists of The repeater of (3), wherein the digital filter filters any of the synthetic received signals according to either the first sample or the second sample. (5) The repeater of (1), wherein the first and second receiving antennas are first and second patch antennas, and the transmitting antenna is a dipole antenna. (6) The repeater of (1), wherein the first and second receiving antennas are first and second dipole antennas, and the transmitting antenna is a patch antenna. (7) The repeater of (1) further comprising a transmit weight controller for applying a weight to any of the combined receive signals based on a predetermined signal metric to generate the transmit signal. (8) The reception weighting circuit adjusts the variable phase shifter for adjusting the phase of any one of the first and second received signals and the gain of any one of the first and second received signals. (1) Repeater, including one with a variable attenuator for. (9) The first and second paths are the repeaters of (1) having different access angles. (10) Relay for a wireless communication network, including first and second receiving antennas for receiving the first receiving signal for the first and second paths, and first and second transmitting antennas. It s a vessel, A reception weighting circuit for applying the first and second weights to the received signals received for the first and second reception paths to generate a first weighted signal and a second weighted signal, and a reception weighting circuit. A signal synthesizer for synthesizing the first and second weighted reception signals according to various mathematical compositions to generate a plurality of composite reception signals, and outputting a predetermined one of the plurality of composite reception signals. A splitter for splitting the predetermined one of the plurality of combined received signals into first and second transmitted signals, and A transmission weighting circuit for applying transmission weights to the first and second transmission signals to generate first and second weighted transmission signals is provided. The first and second transmitting antennas are repeaters for a wireless communication network that transmit the first and second weighted transmission signals. (11) The first and second paths are the repeaters of (10) having different angles of arrival. (12) The repeater of (10) further comprising a controller for controlling the reception weighting circuit according to the measured values of the self-generated signals transmitted on the first and second transmitting antennas. (13) First and second receivers connected to first and second receive antennas for receiving multiple multi-input multi-output (MIMO) signal streams on different paths, and first and second transmit antennas. A repeater for a wireless communication network, including first and second transmitters connected to. A signal synthesizer for synthesizing the plurality of MIMO signal streams according to various mathematical compositions to generate a plurality of synthesized MIMO signal streams, and A weighting circuit for applying weights to each of the plurality of MIMO signal streams to generate a plurality of weighted MIMO signal streams, and A digital processor for determining a dominant signal stream in the weighted MIMO signal stream. A repeater for a wireless communication network in which the dominant signal stream is transmitted on the first transmitting antenna and the remaining MIMO-weighted signal stream is transmitted on the second transmitting antenna. (14) The repeater of (13), wherein the digital processor determines the dominant signal stream based on at least one of signal strength, signal-to-noise ratio, and delay spread.