Abstract: A method and an apparatus are provided in which a vector is generated from a covariance matrix of a received signal. The vector is input to a neural network to obtain an enhanced vector. The enhanced vector is converted into an enhanced matrix. Interference whitening is performed on the received signal using a whitening filter based on the enhanced matrix.

Abstract: Techniques providing opportunistic frequency switching for frame based equipment (FBE), such as may be configured to minimize opportunistic frequency switching delay in FBE new radio (NR) unlicensed (NR-U) networks and/or to provide frequency diversity FBE access based on offset sequences of medium sensing occasions for the carrier frequencies are disclosed. Within the FBE mode network, a base station may configure a pattern of sensing locations in each frame for each frequency transmission unit of the plurality of frequency transmission units, wherein an inter-unit delay of sensing locations between a first frequency transmission unit and a next adjacent frequency transmission unit and between a last frequency transmission unit and the first frequency transmission unit is a fixed duration.

Abstract: An RF signal detection device, including: a first threshold crossing detection circuit comprising an input coupled to an input of the RF signal detection device; a first energy detection circuit comprising an input coupled to the input of the RF signal detection device; a second threshold crossing detection circuit comprising an input coupled to an output of the first energy detection circuit; and further including a control circuit configured to: carry out, by the first threshold crossing detection circuit, detection of at least a first threshold crossing frequency in a predetermined RF frequency band; and carry out, by the first energy detection circuit, energy detection in the predetermined RF frequency band; and carry out, by the second threshold crossing detection circuit, detection of at least a second threshold crossing frequency of a first energy signal delivered as an output from the first energy detection circuit; and determine, at least from the first and second threshold crossing frequencies an

Abstract: A detection system for detecting an electrical discharge in an electrical apparatus includes a first sensing device that senses an acoustic wave and an electromagnetic wave and generates a first combined signal. A signal processing device processes the first combined signal and determines the occurrence and properties of an electrical discharge.

Abstract: Techniques are provided for jammer detection. A methodology implementing the techniques according to an embodiment includes estimating an angle of arrival of a jamming signal, the jamming signal included in a received signal, and generating a direction finding (DF) confidence indicator associated with the estimated angle of arrival. The method also includes extracting the jamming signal from the received signal. The method further includes correlating the extracted jamming signal with previously extracted jamming signals to generate a correlation score and using the correlation score as a uniqueness assessment of the extracted jamming signal. The method further includes identifying characteristics of the extracted jamming signal and generating a characterization confidence indicator. The method further includes demoting the extracted jamming signal to non-jammer status based on one or more of the DF confidence indicator, the uniqueness assessment, and the characterization confidence indicator.

Abstract: Smart Wireless Adapters are provided herein for establishing communication between measurement devices and a measurement control and data acquisition system in an industrial system. In one aspect, a method of establishing communication between a Pneumatic or Analog measurement device and the measurement control and data acquisition system includes providing a Pneumatic or Analog measurement device and providing a Smart Wireless Adapter capable of electrically and mechanically coupling to the Pneumatic or Analog measurement device. The Pneumatic or Analog measurement device is configured to measure one or more parameters in the industrial system and provide a value or signal indicative of the measured parameters at an output of the Pneumatic or Analog measurement device.

Abstract: A data storage circuit includes memory, an error correcting code (ECC) storage circuit, and control circuitry. The memory is configured to store a data value comprising a plurality of fields. Each of the fields is independently writable. The ECC storage circuit is configured to store an ECC value corresponding to the data value. The control circuitry is configured to receive a field value to be written into one of the fields, and store the field value in the one of the fields by writing only the field value to the memory. The control circuitry is also configured to retrieve the ECC value from the ECC storage circuit, compute an updated ECC value based on the ECC value retrieved from the ECC storage circuit and the field value, and store the updated ECC value in the ECC storage circuit.

Abstract: Systems and methods for GNSS anti-jamming using interference cancellation are described herein. In certain embodiments, a system includes an antenna that receives signals, wherein the signals comprise a weak portion associated with one or more GNSS satellites and a strong interference portion from an interfering signal source. The system also includes a GNSS anti-jammer. The GNSS anti-jammer includes an interference isolator that receives the received signals and provides an estimated strong interference portion as an output. The GNSS anti-jammer also includes a summer that subtracts the estimated strong interference portion from the received signals to create a summed signal. Further, the GNSS anti-jammer includes a local noise remover that removes noise generated by the interference isolator from the summed signal, wherein the local noise remover is a processor that digitally removes the noise. Further, the system includes a GNSS receiver coupled to receive the summed signal from the processor.

Abstract: This application provides a channel measurement method and a communications apparatus. The method includes: A terminal device generates first indication information and sends the first indication information to a network device, where the first indication information is determined based on received precoded reference signals of P ports and is used to indicate Q ports in the P ports; the P ports correspond to P angle-delay pairs; each angle-delay pair includes one angle vector and one delay vector; the precoded reference signal of each of the P ports is obtained by precoding a reference signal based on one angle vector and one delay vector; and the Q ports correspond to Q angle-delay pairs in the P angle-delay pairs.

Abstract: Systems and methods for GNSS anti-jamming using interference cancellation are described herein. In certain embodiments, a system includes an antenna that receives signals, wherein the signals comprise a weak portion associated with one or more GNSS satellites and a strong interference portion from an interfering signal source. The system also includes a GNSS anti-jammer. The GNSS anti-jammer includes an interference isolator that receives the received signals and provides an estimated strong interference portion as an output. The GNSS anti-jammer also includes a summer that subtracts the estimated strong interference portion from the received signals to create a summed signal. Further, the GNSS anti-jammer includes a local noise remover that removes noise generated by the interference isolator from the summed signal, wherein the local noise remover is a processor that digitally removes the noise. Further, the system includes a GNSS receiver coupled to receive the summed signal from the processor.

Abstract: A wireless communication network such as a 5G communication network can use MIMO technologies to enhance bandwidth between a wireless communications base station and one or more user equipment devices within a service area of the base station. RF signal repeaters can be utilized to provide one or more additional physical channels for communication between the MIMO base station and the MIMO user equipment. These RF signal repeaters can be regarded as increasing the MIMO channel diversity within the ambient environment.

Abstract: Schemes, mechanisms, and devices for automatic gain control (AGC) signaling are provided. According to one aspect of the present disclosure, a method of wireless communication performed by a user equipment (UE) includes: receiving, from a base station (BS), a signal indicating an automatic gain control (AGC) reference signal resource, wherein the AGC reference signal resource includes at least a first symbol of a slot associated with a scheduled downlink (DL) communication; receiving, from the BS, the scheduled DL communication in the slot, wherein the scheduled DL communication includes an AGC reference signal in the AGC reference signal resource; and performing, based on the AGC reference signal, AGC for the scheduled DL communication.

Abstract: Exemplary apparatus can be provided that can comprise a plurality of antennas; a plurality of conversion systems, each capable of accepting and/or producing one or more digital signals; a circuit (e.g., radio circuit) configured to couple the antennas to the conversion systems; and computer arrangement configurable to selectively control operation of the conversion systems according to one or more predetermined criteria. In some embodiments, the conversion systems can be configured to utilize different sampling rates and/or quantization resolutions and/or to accept and/or produce different numbers of digital signals. Exemplary conversion systems can be enabled/disabled such that one or more can operate simultaneously based on, e.g., subframe timing of received signal, predetermined schedule, power or energy of received signals, availability of reference signals, channel coherence time, and apparatus energy consumption.

Abstract: A radio receiver comprises a matched filter bank and a decision unit. The matched filter bank has a plurality of filter modules for generating correlation-strength data from a sampled radio signal, each filter module being configured to cross-correlate the sampled signal with data representing a respective filter sequence. The decision unit is configured to use the correlation-strength data to generate a sequence of decoded symbols from the sampled signal. The matched filter bank and/or decision unit are configured to determine the value of each symbol in the sequence in part based on the value of a respective earlier decoded symbol from the sequence of decoded symbols.

Abstract: There is provided mechanisms for processing uplink signals. A method is performed by a RRU (200). The method comprises obtaining uplink signals (S102) as received from wireless devices at antenna elements of an antenna array of the RRU (200), each wireless device being associated with its own at least one user layer. The method comprises capturing (S104) energy per user layer by combining the received uplink signals from the antenna array for each user layer into combined signals, resulting in one combined signal per user layer. The combining for each individual user layer is based on channel coefficients of the wireless device associated with said each individual user layer. The method comprises providing (S106) the combined signals to a BBU (300).

Abstract: The present invention discloses a receive data equalization apparatus. A delay-compensating calculation circuit retrieves training data groups of a training data signal to retrieve total delay amount, generate signed compensation amounts according to a relation among training data contents of training data in each of the training data groups to generate total compensation amount accordingly, and solve equations that correspond total delay amount of the training data groups to the total compensation amount to obtain each of the compensation amounts. A receive data equalization circuit receives the compensation amounts and retrieves a receive data group in a receive data signal, generate signed receive compensation amounts according to a relation among receive data contents of receive data in the receive data group to generate a total receive compensation amount accordingly to perform equalization on a terminal edge of the receive data group according to the total receive compensation amount.

Abstract: Infrastructure electronics equipment incorporates infrastructure Local-Site Transports (LSTs). LSTs convey payload sampled signals over imperfect electromagnetic (EM) pathways whose physical properties are usually unknown when the equipment (e.g., Cameras, Displays, Set-Top Boxes) is manufactured. Prior LSTs hedge against EM pathway degradation in several ways: requiring high-quality cables (e.g., HDMI); restricting transmission distance, (e.g., HDMI); and/or reducing quality, via compression, to extend transmission distance somewhat (e.g., Ethernet). The subject of this disclosure is an infrastructure LST for sampled signals that causes the physical errors inevitably arising from propagation of sensory payloads over imperfect EM pathways to manifest in a perceptually benign manner, leveraging legacy infrastructure and reducing costs to achieve a favorable ratio of fidelity to transmission distance.

Abstract: Described herein are systems and methods that allow for correcting a residual frequency offset in the GHz frequency range by using low-complexity analog circuit implementations of a broad-band frequency detector that comprises two analog polyphase filters in a dual configuration. Each filter comprises an RC network of cross-coupled capacitors that facilitate filters with opposite passbands and opposite stop-bands. In various embodiments, the outputs of the two filters are combined to obtain power metrics that when subtracted from each other, deliver a measure of the imbalance between the positive and negative halves of a frequency spectrum. Since the measure is substantially proportional to a frequency offset within a linear range spanning 5 GHz or more, the polyphase filters may be used in a broad-band frequency detector that, based on the measure, adjusts the frequency offset.

Abstract: A radar system and a terminal device are provided. The radar system includes a controller and at least two radar modules directly or indirectly connected to the controller. The at least two radar modules include a first radar module and a second radar module, and the first radar module and the second radar module implement time division multiplexing of the controller in a digital domain. Compared with an existing radar system, the radar system in this application can provide more transmit channels, more receive channels, and a larger antenna array size when the two radar systems include a same quantity of controllers.

Abstract: A wireless communication device comprises a first communication unit, a second communication unit and a single control unit. The first communication unit wirelessly communicates by a first communication signal according to a first communication standard. The second communication unit wirelessly communicates by a second communication signal according to a second communication standard. The second communication signal has a frequency band that overlaps with that of the first communication signal. The second communication standard is different from the first communication standard.

Abstract: Some embodiments are directed to a method of transmission from at least one transmit antenna to all or some of n reception antennas including at least one transmission step suitable for transmitting a first binary information item by using the absence of focusing from the transmit antenna to any one of the n reception antennas, during a predetermined integer number k of symbol times and/or a modulation of the power transmitted by at least one transmit antenna, participating in a coding of a second binary information item. Some other embodiments are directed to a receiver-decoder suitable for reception according to the method.

Abstract: A wireless communication control method suppresses interference using an MMSE weight in an environment of wireless communication where the number of transmission stations transmitting a signal to a receiving station is larger than the number of reception antennas of the receiving station. The receiving station calculates power of an interference signal included in a signal received by the receiving station from the transmission stations the number of which is larger than the number of reception antennas, the interference signal corresponding to a part by which the number of transmission stations exceeds the number of reception antennas. The receiving station calculates the MMSE weight depending on the power of the interference signal, recalculates the power of the interference signal using the MMSE weight, and recalculates the MMSE weight depending on the recalculated power of the interference signal.

Abstract: A security signal transmission method performed by a first communication node includes estimating a radio channel between the first communication node and a second communication node; classifying all subcarriers into a first subcarrier group for transmitting a data signal and a second subcarrier group for transmitting a jamming signal based on estimated channel information; generating data symbol(s) by allocating the data signal to subcarriers of the first subcarrier group; generating jamming symbol(s) by allocating the jamming signal to subcarriers of the second subcarrier group; generating a first control symbol to which a first control signal is mapped, the first control signal including a first reference value used to restore the data symbols at the second communication node; and transmitting the data symbol(s), the jamming symbol(s), and the first control symbol to the second communication node.

Abstract: According to an embodiment of the disclosure, a base station communicating by using a plurality of antennas includes: a memory; a transceiver including the plurality of antennas forming an array structure; and at least one processor configured to convert first in-phase quadrature (IQ) data included in a first digital signal into radio frequency (RF) signals and then apply the RF signals to the plurality of antennas, respectively, detect a back-lobe signal beam-formed by the plurality of antennas, and perform linearization on second IQ data included in a second digital signal, based on the detected back-lobe signal.

Abstract: A wide-band analog input signal is converted into a digital output signal on the basis of a band division method without the need for filter circuits. An analog processing block Aj (j=2 to N, where N is an integer) down-converts an analog input signal Sx using a cutoff frequency fj-1 of a channel CHj-1 and A/D-converts an analog signal Saj acquired as a result. A digital processing block Bj doubles the signal strength of a first digital signal S1j acquired by Aj, subtracts a third digital signal S3j-1 of the channel CHj-1 from a second digital signal S2j acquired as a result, up-converts the acquired third digital signal S3j using the cutoff frequency fj-1, and outputs the result to an adder as a channel output signal Syj of a corresponding channel CHj.

Abstract: A mixer for mixing a radio frequency signal is described. The mixer includes a local oscillator input, a phase adjustment module, and at least one mixing channel. The local oscillator input is configured to receive a local oscillator signal. The phase adjustment module is configured to control a phase of the local oscillator signal in order to add a desired amount of delay to the local oscillator signal, thereby generating at least one adapted oscillator signal. The at least one adapted oscillator signal has a desired phase difference compared to the local oscillator signal. The at least one mixing channel includes at least one mixer unit having at least one signal input. The at least one mixing channel is configured to receive the at least one adapted oscillator signal. The at least one mixing channel further is configured to forward the adapted oscillator signal to the mixer unit. The at least one signal input is configured to receive an input signal.

Abstract: A wireless communication system and a precoder device for use in such system. The precoder device includes a delay element arranged to introduce a delay to a plurality of sub-channels of a signal at a transmitter end of the communication system; wherein the delay in a plurality of sub-channels are associated with a process time of a receiver component at a receiver end of the communication system.

Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for switching between transmission technologies within a spectrum based on network load are described. In one aspect, a method includes obtaining first network load information that indicates network load for a first access point operating using listen before talk (LBT) and second network load information for a second access point using LBT, determining if at least one of the first network load information or the second network load information satisfies a network load threshold, and in response to determining that that the network load information satisfies the network load threshold, providing an instruction to the first access point to operate using frequency domain multiplexing.

Abstract: Methods, apparatuses, and systems for calculating time delays by a Wasserstein approach are provided. A plurality of signals are recorded by a plurality of sensors (three or more), respectively, and received at a controller. The plurality of signals recorded by the plurality of sensors are generated in response to a signal emitted by a source. The plurality of signals are converted into a plurality of probability density functions. A cumulative distribution transform for each of the plurality of probability density functions is calculated. A time delay for each unique pair of the plurality of sensors is calculated by minimizing a Wasserstein distance between two cumulative distribution transforms corresponding to the unique pair of the plurality of sensors.

Abstract: An operation method of a first node belonging to an Xhaul network in a wireless backhaul system including the Xhaul network may comprise transmitting first resource allocation information to a second node and third nodes; receiving, from the second node, information of cross polarization interferences (XPIs) measured for wireless signals through wireless links generated based on the first resource allocation information; generating second resource allocation information indicating resources allocated to each of the second node and the third nodes based on the information of the XPIs; and transmitting the second resource allocation information to the second node and the third nodes, wherein the XPIs for the wireless signals are measured by the third nodes.

Abstract: A memory subsystem and method for performing calibrations therein is disclosed. A memory subsystem includes a memory controller coupled to a memory by a plurality of signal paths. The memory controller is configured to perform an initial calibration to determine respective eye patterns corresponding to the ones of the plurality of signal paths. For a subsequent calibrations, updated eye patterns are determined for a subset of the plurality of signal paths. Remaining ones of the plurality of signal paths (not included in the subset), are not active during the subsequent calibrations. Updated eye patterns for the remaining ones of the plurality of signal paths are determined based on information obtained during the initial calibration and information from signal paths in the subset designated proxies for the remaining ones of the plurality of signal paths.

Abstract: A server, system, and client are provided. The server receives audio data from one or more clients; receives an audio data request from a requesting client, and obtains, from the audio data request, a mixing manner of audio data requested by the requesting client; preprocesses audio data of a client of the one or more clients that corresponds to the audio data request using the obtained mixing manner; and sends the preprocessed audio data to the requesting client.

Abstract: A distributed beamforming system including a platform terminal and a plurality of user terminals is disclosed. An individual user terminal includes a receiver configured to receive a plurality of individual wireless signals, where the plurality of individual wireless signals are transmitted by the platform terminal and are orthogonal with respect to one another. The individual user terminal also includes one or more frequency converters configured to transform each of the plurality of individual wireless signals to an intermediate frequency. The individual user terminal is configured to coherently combine the plurality of individual wireless signals together to form a beamformed signal.

Abstract: The present invention provides a method for equivalent high sampling rate FIR filtering based on FPGA, first, the coefficients h(k) of FIR filter are found by using MATLAB, multiplied by an integer and then rounded for the purpose that the rounded coefficients h(k) can be directly used into a FPGA, then the ADC's output of high data rate fs is lowered by dividing the ADC's output x(n) into M parallel data streams xi(n) of low data rate, and the M×L samples in one clock cycle is obtained by delaying the M parallel data streams xi(n) simultaneously by 1, 2, . . . , L? periods of the synchronous clock, at last, the samples yi(n) of FIR filtering output is calculated according to the samples selected from the M×L samples, and the filtered data y(n) of data rate fs is obtained by putting the samples yi(n) together in ascending order of i. Thus, the continuous FIR filtering of an ADC's output sampled with high sampling rate is realized, while the data rates before and after the FIR filtering are unchanged.

Abstract: A relay including a first transmitter that converts a first digital transmit signal to a first analog transmit signal, a first receiver that converts a first analog receive signal to a first digital receive signal, a second transmitter that converts a second digital transmit signal to a second analog transmit signal, a second receiver that converts a second analog receive signal to a second digital receive signal, and a self-interference canceller that generates a first self-interference cancellation signal based on at least one of the first digital transmit signal and the first analog transmit signal, and combines the first self-interference cancellation signal with at least one of the first digital receive signal and the first analog receive signal.

Abstract: Embodiments of the present invention relate to the communications field, and provide a data transmission method, a sending device, and a receiving device. Transmission requirements of different subbands can be maximally satisfied, and a system throughput can be improved. The method includes: determining, by a sending device, rank indicators of J (an integer greater than or equal to 1) subbands corresponding to a to-be-transmitted channel, where the rank indicators of the J subbands are not totally the same; determining, by the sending device based on a rank indicator of each of the J subbands, a transmission block size.

Abstract: A RFID tag (1) for communicating with an external reader comprises: two antenna connections (LA, LB) for connecting the RFID tag (1) to an antenna (10), an active receiver switch circuit (5) for receiving two input sinusoidal signals from the two antenna connections (LA, LB) and generating a rectified waveform signal (8), a modulation detection circuit (12) for receiving two input sinusoidal signals from the two antenna connections (LA, LB) and generating a first demodulation signal (13) related to a 10% amplitude modulation of a RF field for communication between the reader and the RFID tag (1) and a second demodulation signal (14) related to a 100% amplitude modulation of a RF field for communication between the reader and the RFID tag (1).

Abstract: An analog-to-digital converter (ADC) module includes a plurality of frequency stacked ADCs. A splitter splits channels into two segments to transmit the signal through respective low pass and high pass filters to send the analog signal to a low frequency ADC and a high frequency ADC along each channel. When using a quad-tuner having four channels, there are eight ADCs: four high frequency ADCs and four low frequency ADCs. Typically, there is one ADC associated with each channel. Thus, a quad-tuner would be used with an ADC module having four ADCs. However, by splitting and filtering each channel and increasing the number of ADCs in the ADC module, the system, assembly, and method in the present disclosure is able to increase the frequency bandwidth throughput along legacy radio frequency (RF) cables on a platform without the need of replacing any legacy hardware or the legacy RF cables.

Abstract: An automatic gain control system for a receiver for an asymmetrical and/or unbalanced constellation, the system including: an automatic gain control loop adapted to be coupled to both a first transimpedance amplifier coupled to a first analog-to-digital converter forming a first tributary and a second transimpedance amplifier coupled to a second analog-to-digital converter forming a second tributary; wherein the automatic gain control loop is operable for providing an offset gain control voltage to gain balance a transimpedance amplifier voltage and a power associated with the first tributary and a transimpedance amplifier voltage and a power associated with the second tributary. The automatic gain control loop includes an analog automatic gain control loop. The automatic gain control loop is implemented in hardware or firmware.

Abstract: In a noise canceller device, interference signal adjustment units adjust delay, phase and amplitude of a signal received by a sub antenna under different conditions to obtain adjustment signals, and subtract the adjustment signals from a signal received by a main antenna to obtain differential signals. An average power calculation unit calculates an average power for each of the differential signals. An optimal condition search unit determines the values of delay, phase and amplitude that result in the minimum average power, and sets the values in an optimal interference signal adjustment unit. The optimal interference signal adjustment unit adjusts the signal received by the sub antenna using optimal values for delay, phase and amplitude to obtain an optimal adjustment signal. A cancellation unit subtracts the optimal adjustment signal from the signal received by the main antenna to remove interference signals, and outputs a desired signal to a host device.

Abstract: A co-channel interference cancellation method and apparatus are provided. The method includes: obtaining effective interference by filtering co-channel interference according to a preset interference strength threshold, and obtaining a plurality of effective interference subgroups by grouping the effective interference; obtaining a reference interference sub-signal corresponding to the effective interference subgroup, by delaying a reference interference signal according to a determined interference delay of each effective interference subgroup; after each reference interference sub-signal passes through a corresponding adaptive interference reconstruction filter, obtaining a reconstructed interference signal by overlaying each reference interference sub-signal; and performing a subtraction operation on a received signal and the reconstructed interference signal. In this way, spectrum consumption is greatly reduced, and implementation is simple.

Abstract: A solution for operating a radio communication apparatus communicating with at least one other apparatus is provided. In communication, a frequency block of a set of frequency blocks having a given center frequency is utilized. The center frequencies of at least some adjacent frequency blocks are separated by a given frequency offset. The offset is selected such that the adjacent frequency blocks are partly overlapping and the apparatus receiving a given frequency interprets a signal separated from the given signal by the offset as noise.

Abstract: A method (200) of determining mutual information of a composite receive signal, the composite receive signal comprising a reference signal and a data signal, includes the following acts: estimating (201) a base metric of the composite receive signal based on the reference signal, the base metric being indicative of a channel quality; and determining (202) the mutual information based on the base metric and the data signal.

Abstract: A relay including a first transmitter that converts a first digital transmit signal to a first analog transmit signal, a first receiver that converts a first analog receive signal to a first digital receive signal, a second transmitter that converts a second digital transmit signal to a second analog transmit signal, a second receiver that converts a second analog receive signal to a second digital receive signal, and a self-interference canceller that generates a first self-interference cancellation signal based on at least one of the first digital transmit signal and the first analog transmit signal, and combines the first self-interference cancellation signal with at least one of the first digital receive signal and the first analog receive signal.

Abstract: Disclosed are methods and systems for segregating user equipment devices (UEs) among carriers to help facilitate operation in lean-carrier mode in which a base station (BS) engages in a reduced extent of reference signaling on a particular carrier. In practice, the BS may operate in the lean-carrier mode when bearer data is not being communicated on the particular carrier. Given this arrangement, the BS may identify one or more UEs, of a plurality of UEs served by the BS, based on each UE communicating bearer data less frequently than a threshold frequency of bearer data communication. And the BS may serve just the identified UEs on the particular carrier, thereby increasing a probability of the BS operating in the lean-carrier mode.

Abstract: A method for calibrating an antenna array coupled to a plurality of transmitters via a plurality of couplers and a plurality of antenna element feeds is described.

Abstract: An antenna apparatus for use in a wireless network and method of operating such an antenna apparatus are provided. The antenna apparatus has omnidirectional antenna elements and RF chains, where there are fewer RF chains than omnidirectional antenna elements. A subset of the omnidirectional antenna elements are coupled to the RF chains and sampling circuitry coupled to the RF chains samples the signals received by the subset of the omnidirectional antenna elements. This forms part of a signal detection process in which different subsets of the omnidirectional antenna elements are iteratively coupled to the RF chains. A signal sample spatial covariance matrix for the omnidirectional antenna elements is constructed from the signals sampled by the sampling circuitry at each iteration and a beamforming algorithm applied to the signal sample spatial covariance matrix parameterizes the signals received by the omnidirectional antenna elements.

Abstract: A radio frequency (RF) receiver may comprise a first sampling module that is operable to sample in a first level at a particular main sampling rate; a plurality of second-level sampling modules, wherein each of the plurality of second-level sampling modules is operable to sample in a second level, an output of the first level, at a second sampling rate that is reduced compared to the main sampling rate; and a plurality of third-level modules, each comprising a plurality of third-stage sampling sub-modules that are operable to sample at a third sampling rate that is reduced compared to the second sampling rate, and a plurality of corresponding analog-to-digital conversion (ADC) sub-modules.

Abstract: A wideband receiver system comprises a mixer module, a wideband analog-to-digital converter (ADC) module, and digital circuitry. The mixer module is configured to downconvert a plurality of frequencies that comprises a plurality of desired television channels and a plurality of undesired television channels. The wideband ADC module is configured to digitize the swatch of frequencies comprising the plurality of desired television channels and the plurality of undesired television channels. The digital circuitry is configured to select the desired plurality of television channels from the digitized plurality of frequencies, and output the selected plurality of television channels to a demodulator as a digital datastream.

Abstract: Representative implementations of devices and techniques provide self-interference suppression for a transceiver of a wireless communication system. To minimize interference from a transmit signal appearing on a receive path of the system, a cross-correlation is minimized between the transmit signal and a desired receive signal.