Abstract: An antenna includes an antenna element array configured to form a dual beam and including at least three antenna elements and a feed network including a first signal input terminal configured to input a first beam signal for forming a first beam, a second signal input terminal configured to input a second beam signal for forming a second beam, a third signal input terminal configured to input a third beam signal for forming a third beam, and a diplexer including a first input terminal, a second input terminal, and an output terminal. The diplexer is electrically connected to at least one antenna element in the antenna element array through the output terminal and configured to process a signal associated with a dual-beam signal and a signal associated with the third beam signal working in a different frequency band from the dual-beam signal, to obtain a combined signal.

Abstract: Embodiments provide a data sampling circuit and a data sampling device. The sampling circuit includes: a first sampling module configured to respond to a signal from a data signal terminal and a signal from a reference signal terminal and to act on a first node and a second node; a second sampling module configured to respond to a signal from the first node and a signal from the second node and to act on a third node and a fourth node; a latch module configured to input a high level signal to a first output terminal and input a low level signal to a second output terminal or input the low level signal to the first output terminal and input the high level signal to the second output terminal according to a signal from the third node and a signal from the fourth node; and a decision feedback equalization module.

Abstract: The present disclosure discloses a codebook feedback method, a terminal device and a network device. The codebook feedback method, comprising: selecting, by a terminal device, M frequency domain Discrete Fourier Transform (DFT) vectors from a DFT array; determining, by the terminal device, a first frequency domain DFT vector indication set from a plurality of frequency domain DFT vector indication sets according to the M frequency domain DFT vectors, wherein an indication of the M frequency domain DFT vectors is equivalent to a first frequency domain DFT vector indication in the first frequency domain DFT vector indication set, and M is a positive integer; and sending, by the terminal device, an indication message to the network device, wherein the indication message is used for indicating the first frequency domain DFT vector indication set.

Abstract: A reception device includes: a receiver that receives a multiplexed signal; a first demapper that demaps the multiplexed signal, with a second modulated symbol stream of a second data series being included in the multiplexed signal as an undefined signal component, to generate a first bit likelihood stream of a first data series; a second demapper that demaps the multiplexed signal, with a first modulated symbol stream of the first data series being included in the multiplexed signal as an undefined signal component, to generate a second bit likelihood stream of the second data series; a first decoder that performs error control decoding on the first bit likelihood stream to derive the first data series; and a second decoder that performs error control decoding on the second bit likelihood stream to derive the second data series.

Abstract: A wireless wake-up receiver includes multiple signal chains each signal chain being coupled to continuously receive a signal from a respective antenna and to provide a respective detected pattern at a signal chain output. Each signal chain includes a first path having a mixer-first architecture and operates in a bandpass-mode using differential signals. The wireless wake-up receiver also includes a digital correlator operable to receive the respective detected patterns and to determine whether one of the respective detected patterns is equal to a desired pattern.

Abstract: The embodiments described herein provide for a method and system for training an optimal decision feedback equalization (DFE) coefficient for use in GDDR and DDR applications. The method includes determining a first expected bit pattern using a reference voltage. The method further includes determining a transition voltage value of the first expected bit pattern. The method further includes receiving a second expected bit pattern having a same first bit as the first expected bit pattern. The method further includes determining a transition voltage value of the second expected bit pattern using the reference voltage. The method further includes calculating an optimal reference voltage value by averaging the transition voltage values of the first expected bit pattern and the second-expected bit pattern and storing the optimal reference voltage value in a register corresponding to a logic value of the same first bit.

Abstract: A first communication device transmits a plurality of training signals to a second communication device via a communication channel. The first communication device receives feedback generated at the second communication device based on the plurality of training signals. The feedback includes steering matrix information for a plurality of orthogonal frequency division multiplexing (OFDM) tones and (ii) additional phase information corresponding to channel estimates obtained for the plurality of OFDM tone. The first communication device constructs, based on the steering matrix information, a plurality of steering matrices corresponding to the plurality of OFDM tones, and compensates, using the additional phase information, the plurality of steering matrices to reduce phase discontinuities between the OFDM tones. The first communication device steers, using the compensated steering matrices, at least one transmission via the communication channel to the second communication device.

Abstract: An initiator device is provided with a generation circuit for supporting Single User (SU)-Multiple Input Multiple Output (MIMO) operation and generating a first signal including a value that indicates which of a reciprocal MIMO phase and a non-reciprocal MIMO phase is to be applied to SU-MIMO BF training, and a transmission circuit for transmitting the first signal to a responder device. The responder device is provided with a reception circuit for receiving the first signal from the initiator device, and a processing circuit for determining on the basis of the value which of the reciprocal MIMO phase and the non-reciprocal MIMO phase is to be applied to SU-MIMO BF training.

Abstract: The present disclosure discloses a signal equalization apparatus. A channel length estimation circuit determines a transmission channel length of the input signal such that a processing circuit retrieves predetermined feed-forward equalizer coefficients. A feed-forward equalizer equalizes the input signal according to operation feed-forward equalizer coefficients. An auto gain circuit amplifies the input signal according to an offset signal. A signal adding circuit adds the amplified input signal and a feedback adjusting signal to generate an added input signal. A data slicer generates a data-slicing result and the offset signal according to reference thresholds based on the added input signal. A feedback equalizer equalizes the data-slicing result to generate the feedback adjusting signal according to operation feedback equalizer coefficients.

Abstract: Systems and methods for enabling precoding diversity in the time domain are provided. In some embodiments, a User Equipment (UE) includes circuitry including a processing module and a memory module configured to receive an indication that a physical channel is repeated over a set of subframes and receive an indication that the UE can assume that a first subset of the repetitions of the physical channel and a reference signal will use a first precoder. In this way, in some embodiments, the UE can coherently combine the repetitions, including the reference signals used by the physical channel. The ability to coherently combine repetitions of the physical channel may improve both the estimates of the physical channel as well as channel estimates derived from the repeated reference signals.

Abstract: A bridge connected between a first process control loop and a second process control loop wherein the bridge allows alternating current digital signals to pass between the first process control loop and the second process control loop while preventing direct current analog signals from passing between the first process control loop and the second process control loop.

Abstract: A method and related apparatus for outputting an analog signal are disclosed. A plurality of transmit levels corresponding to respective predetermined equalization levels is provided. A stream of digital signals carrying data is provided. A transmit level from among the plurality of transmit levels based on the digital signals carrying data is selected. The selected transmit level is received, the selected transmit level is converted to an analog signal of the selected transmit level, and the analog signal of the selected transmit level is output over a signal interface.

Abstract: A transmitter includes a data stream encoder layer having an output and a pattern generator having a bit pattern output. The transmitter further includes a first multiplexer having first and second inputs and a first multiplexer output. The first input is coupled to the output of the data stream encoder layer, and the second input is coupled to the bit pattern output of the pattern generator. While at least a portion of the data stream encoder layer is powered down, the pattern generator is configured to provide bit patterns on its bit pattern output, a control signal to the first multiplexer is configured to select the second input of the first multiplexer, and the first multiplexer is configured to output the bit patterns on the output of the first multiplexer.

Abstract: A method, by which a terminal transmits channel state information in a wireless communication system, comprises a step for performing one integrated CSI process, the step for performing one integrated CSI process comprising the steps of: receiving, from a base station, a first channel state information-reference signal related to a CSI-RS resource which is not pre-coded; reporting, to the base station, a first pre-coding matrix indicator derived on the basis of the first CSI-RS; receiving, from the base station, a second CSI-RS related to one CSI-RS resource of a beam-formed CSI-RS type; and reporting, to the base station, a second rank indicator/channel quality indicator/second PMI derived on the basis of the second CSI-RS.

Abstract: A processing device in a transmit-receive point for interference-aware beam pair selection, a transmit-receive point and a method are disclosed. The processing device is configured to select a beam pair from a set of candidate beam pairs (i, j), for setting up a communication link from a serving transmit device to a receive device via the selected beam pair, wherein each of the candidate beam pairs comprises a transmit beam j of the serving transmit device and a receive beam i of the receive device, wherein the selection is based on statistics of a usage of one or more interfering transmit beams (m, k) of one or more interfering transmit devices m, and k represents one or more transmit beams.

Abstract: Finite-alphabet beamforming for multi-antenna wideband systems is provided. The combination of massive multi-user multiple-input multiple-output (MU-MIMO) technology and millimeter-wave (mmWave) communication enables unprecedentedly high data rates for radio frequency (RF) communications. In such systems, beamforming must be performed at extremely high rates over hundreds of antennas. For example, spatial equalization applies beamforming in the uplink to mitigate interference among user equipment (UEs) at a base station (BS). Finite-alphabet equalization provides a new paradigm that restricts the entries of a spatial equalization matrix to low-resolution numbers, enabling high-throughput, low-power, and low-cost equalization hardware. Similarly, precoding applies beamforming in the downlink to maximize the reception of a signal transmitted from a BS to a target UE. Finite-alphabet precoding can be applied in the downlink to similarly improve power and cost in precoding hardware.

Abstract: The present disclosure relates to sampling wireless signals received at a receiver. Subsets of the digital samples are multiplied by a Pseudo-Noise (PN) code to generate tone signals. A pattern of tone signals may indicate the presence of a repeating preamble. This may be used to locate a payload that follows the preamble. A tone signal of a payload may be decoded by multiplying a subset of the digital samples with the PN code to generate a tone signal. The tone signal may be transformed into the frequency domain to identify a frequency component having an energy level above a threshold. Using the frequency component, the payload is decoded. By structuring a packet as a series of PN-code modulated tone signals, packets received from different sources may be differentiated even when they arrive at overlapping points of time. This allows for a larger transmitting capacity in a network.

Abstract: Methods and apparatus for frequency offset estimation are disclosed. In an exemplary embodiment, a method includes determining a demodulation reference signal (DMRS) frequency offset estimate from DMRS symbols in a received signal, and determining a cyclic prefix (CP) frequency offset estimate from cyclic prefix values in the received signal. The method also includes combining the DMRS and CP frequency offset estimates to determine a final frequency offset estimate. In an exemplary embodiment, an apparatus includes a DMRS frequency offset estimator that determines a DMRS frequency offset estimate based on DMRS symbols received in an uplink transmission, and a cyclic prefix (CP) frequency offset estimator that determines a CP frequency offset estimate based on cyclic prefix values in the uplink transmission. The apparatus also includes an offset combiner that combines the DMRS frequency offset estimate with the CP frequency offset estimate to generate a final frequency offset estimate.

Abstract: A receiver is equipped with an adaptive phase-offset controller and associated timing-calibration circuitry that together shift the timing for a data sampler and a digital equalizer. The sample and equalizer timing is shifted to a position with less residual inter-symbol interference (ISI) energy relative to the current symbol. The shifted position may be calculated using a measure of signal quality, such as a receiver bit-error rate or a comparison of filter-tap values, to optimize the timing of data recovery.

Abstract: The present specification relates to a method for transmitting and receiving signals in a wireless local area network (WLAN) system and an apparatus therefor, the method comprising the steps of: generating a training sub-field consisting of a certain number of orthogonal frequency division multiplexing (OFDM) symbols; and transmitting, to a second STA, a signal including a header field and the training sub-field, wherein the transmitted signal is repeatedly transmitted T times (where T is a natural number) on the basis of information indicated by the header field after a data field.