Abstract: A Digital-to-Analog Converter, DAC, is provided. The DAC comprises one or more first DAC cells configured to generate a first analog signal based on first digital data. The one or more first DAC cells are coupled to a first output node for coupling to a first load. The DAC comprises one or more second DAC cells configured to generate a second analog signal based on second digital data. The one or more second DAC cells are coupled to a second output node for coupling to a second load. The one or more first DAC cells and the one or more second DAC cells are couplable to a power supply for drawing a supply current. The DAC further comprises a data generation circuit configured to generate the second digital data based on the first digital data.

Abstract: Methods, systems, and devices for wireless communications are described. Techniques provide for reliable signal processing and amplification of downlink signals. A network entity may apply a digital pre-distortion (DPD) process to a signal for transmission to a user equipment (UE) and may apply a crest factor reduction (CFR) process to the output of the DPD process. The output of the CFR process may be amplified by a power amplifier and transmitted via a downlink transmission to the UE. The CFR process limits the peak power of the signal provided to the power amplifier (e.g., to a configured level), thereby reducing the peak to average power ratio (PAPR) of the signal provided to the power amplifier. The DPD process may compensate for non-linearities of the power amplifier. A training procedure for the DPD process may account for the CFR process applied after the DPD process.

Abstract: A base station may transmit, to a wireless device, one or more messages comprising configuration parameters for a primary cell and a secondary cell. The configuration parameters may indicate a deactivation timer for the secondary cell and a bandwidth part (BWP) inactivity timer for the primary cell. The base station may start the deactivation timer in response to activating the secondary cell. The base station may start the BWP inactivity timer in response to switching an active BWP of the primary cell. The base station may stop the BWP inactivity timer of the primary cell based on triggering a random-access procedure for the secondary cell. In response to the deactivation timer of the secondary cell expiring during the random-access procedure, the base station may restart the BWP inactivity timer of the primary cell.

Abstract: Embodiments of apparatus and method for transition smoothing implementation on a stream of data are disclosed. In an example, a system on chip (SoC) for wireless communication includes a digital front-end. The digital front-end is configured to obtain a stream of data having one carrier or multi-carriers. The stream of data is divided into a plurality of blocks. The digital front-end is also configured to adjust a gain of the stream of data based on a predetermined frequency corresponding to a length of each of the plurality of blocks. The digital front-end is also configured to append a ramp-down tail sequence to a first block of the stream of data after a last sample of the first block, and generate a ramp-up head sequence for a second block immediately after the first block, based on a head sequence of the second block.

Abstract: Systems, methods, apparatuses, and computer program products for beam selection using data radio bearer specific machine learning are provided. For example, a method can include providing one or more inputs regarding a plurality of beams to a machine learning model. The method can also include obtaining at least one output value regarding the plurality of beams from the machine learning model. The machine learning model can be a data radio bearer specific machine learning model, a data radio bearer group specific machine learning model, or a model trained to output selectively data radio bearer specific values or data radio bearer group specific values.

Abstract: Embodiments of systems and methods for combining downlink signals representative of a communication signal are provided herein. An example method comprises receiving samples of the downlink signals from multiple antenna feeds; generating first symbols for a first signal and second symbols for a second signal based on performing timing recovery operations on the first signal and the second signal, respectively; generating offset information based on performing a correlator operation on the first and second symbols; and combining the first and second signals based on performing a weighted combiner operation. At least one of the first timing recovery operation, the second timing recovery operation, the correlator operation, and the combing are performed in a plurality of processing blocks in one or more processors, wherein the first and second processing block operate in parallel.

Abstract: The present disclosure provides a communication device and an operating method. The communication device includes an antenna, a transmission processor, a radio frequency chain, and a reception processor. The transmission processor is configured to output a second transmission input signal with the same average power as the average power of a first transmission input signal and a second amplitude greater than a first amplitude of the first transmission input signal. The RF chain is configured to output an RF output signal to be transmitted through the antenna, based on a transmission input signal, and to output a reception input signal based on a signal received through the antenna. The reception processor is configured to check an out-of-band blocker by detecting a peaked frequency spectrum based on the reception input signal and to adjust a reception characteristic parameter of the RF chain based on an amplitude of the peaked frequency spectrum.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for training and deploying machine-learned communication over multi-input-multi-output (MIMO) channels.

Abstract: A method for cancelling radio frequency interference (RFI) and a communication system thereof are provided. In the communication system, digital signals of a frequency domain are converted from analog signals and received by the communication system generally carry RFI, and the signals are processed by an equalizer and a far-end crosstalk canceller. Then, for preventing erroneous signals from forming due to an occurrence of a notch, masking parameters applied to the equalizer and the far-end crosstalk canceller are modified for not processing frequency bands that are RFI-affected. The frequency bands can be ignored by masking corresponding bins in the frequency domain after a fast Fourier transformation. The signals processed by the equalizer and the far-end crosstalk canceller are then outputted to an RFI canceller, and the signals with RFI cancellation can be obtained.

Abstract: A 10BASE-T transmitter includes a Manchester encoder circuit, a waveform shaper circuit, and digital-to-analog converter (DAC) circuit. The Manchester encoder circuit applies Manchester encoding to an input data to generate an encoded data. The waveform shaper circuit converts the encoded data into a plurality of digital codes. The DAC circuit generates a transmit (TX) waveform according to the plurality of digital codes. The waveform shaper circuit controls a portion of the plurality of digital codes for applying pre-compensation of inter-symbol interference (ISI) to the TX waveform.

Abstract: This application provides example symbol processing methods and apparatuses. One example method includes generating a first symbol in a symbol sequence, where the first symbol and a second symbol have a same first symbol component, a start location of the first symbol component in the first symbol is a start location of the first symbol, a start location of the first symbol component in the second symbol is a location at which a cyclic prefix is truncated in the second symbol, the second symbol is a next symbol adjacent to the first symbol, and the first symbol and the second symbol each has a cyclic prefix. The first symbol can then be sent.

Abstract: A design application is configured to generate a latent space representation of a fleet of pre-existing vehicles. The design application encodes vehicle designs associated with the fleet of pre-existing vehicles into the latent space representation to generate a first latent space location. The first latent space location represents the characteristic style associated with the fleet of pre-existing vehicles. The design application encodes a sample design provided by a user into the latent space representation to produce a second latent space location. The design application then determines a distance between the first latent space location and the second latent space location. Based on the distance, the design application generates a style metric that indicates the aesthetic similarity between the sample design and the vehicle designs associated with the fleet of pre-existing vehicles. The design application can also generate new vehicle designs based on the latent space representation and the sample design.

Abstract: Provided are a gain compensation device and a bias circuit device. A compensation bias current is generated by the gain compensation device to compensate the gain deviation of power amplifier and improve stability of power amplifier. Through high-temperature compensation unit and low-temperature compensation unit in different gears, gain of power amplifier is compensated along with temperature changes, thereby improving feasibility of the gain compensation device. It takes small space, and the circuit only includes the circuits corresponding to high-temperature compensation unit and low-temperature compensation unit, so the circuit is relatively simple and beneficial to miniaturization.

Abstract: An apparatus includes a first communication device with multiple antennas, operably coupled to a processor and configured to access a codebook of transformation matrices. The processor generates a set of symbols based on an incoming data, and applies a permutation to each of the symbols to produce a set of permuted symbols. The processor transforms each of the permuted symbols based on at least one primitive transformation matrix, to produce a set of transformed symbols. The processor applies, to each of the transformed symbols, a precode matrix selected from the codebook of transformation matrices to produce a set of precoded symbols. The codebook of transformation matrices is accessible to a second communication device. The processor sends a signal to cause transmission, to the second communication device, of multiple signals, each representing a precoded symbol from the set of precoded symbols, each of the signals transmitted using a unique antenna from the plurality of antennas.

Abstract: Receivers and receiving methods having maximum likelihood sequence detection with pseudo partial response equalization. One illustrative receiver includes: a feedforward equalizer that produces an equalized receive signal by diminishing a receive signal's intersymbol interference; a decision element that derives initial symbol decisions from samples of the equalized receive signal; and a filter that applies a partial response to the equalized receive signal or to an equalization error signal to produce input for a maximum likelihood sequence detector (MLSD). The MLSD may be a reduced complexity detector that derives a final sequence of symbol decisions by evaluating state metrics only for each initial symbol decision and its competing symbol decision.

Abstract: A parameter determination apparatus (2) includes: a first learning device (2111) learning a weight between a [j?1]-th layer (j is an integer that satisfies a condition that “2?j?the number of the layer”) and a [j]-th layer to which an output of the [j?1]-th layer is inputted among a plurality of layers of a neural network; a selecting device (2112) selecting at least one valid path for each node included in the [j]-th layer from a plurality of connection paths that connect nodes in the [j?1]-th layer and nodes in the [j]-th layer, respectively, on the basis of the weight learned by the first learning device; and a second learning device (2113) learning at least one of the weight and a bias as the parameters relating to a network structure between the [j?1]-th layer and the [j]-th layer on the basis of the sample signal, the label signal and the valid path.

Abstract: Systems, devices, methods, and computer readable medium for transmitting data using polynomials and instantaneous spectral analysis. In and/or prior to the transmitter, a signal may be formed by fitting the data with a polynomial, which is projected onto Cairns series functions. The Cairns series functions are converted into Cairns exponential functions, which are combined based on frequency information to produce the set of sinusoidals with continuously time-varying amplitude, each of the sinusoidals having a different frequency.

Abstract: Systems and methods for controlling and managing operation of one or more power amplifiers to optimize the performance of one or more antennas are disclosed. An example wireless-power transmission system includes a power amplifier, one or more antennas, and one or more integrated circuits. The one or more integrated circuits are configured to adjust power provided to the one or more antennas from a power amplifier and adjust a power distribution for the transmission field based, in part, on the adjusted power provided to the one or more antennas from the power amplifier such that the adjusted power provided is evenly distributed across the power distribution for the transmission field of the antenna. The even distribution of the adjusted power results in a reduced power loss at an edge of the power distribution for the transmission field of the antenna from 30% to 10%.

Abstract: Method comprising receiving, by a first antenna, a first signal, and receiving, by a second antenna, a second signal. A feeder signal is forwarded to a base station, wherein the feeder signal is based on the first signal and the second signal. A polarization angle of the second antenna is different from a polarization angle of the first antenna.

Abstract: Systems and methods for implementation of modified decision feedback equalization. In one embodiment, a method, includes sweeping a reference voltage signal across a set of voltages to find a center point of an eye diagram, determining whether an asymmetry is present in the eye diagram relative to the center point of the eye diagram, and when an asymmetry is determined to be present, generating a control signal to select a mode of decision feedback equalization to be applied to an input data bit.