Abstract: Pre-scaled orthogonal differential vector signalling (ODVS) techniques are described. The ODVS encoding schemes described herein generate one sub-channel for each bit by multiplying each bit by a different row in a transmitter encoding matrix to produce a set of sub-channels. Each wire carries a signal that is a superposition of elements from all of the sub-channels in the set. The transmitter encoding matrix is selected such that its rows (i.e. sub-channels) are mutual orthogonal. This means that the receiver can decode the signals received from all wires in concert to reliably recover the original bits. The transmitter encoding matrix is a Hadamard matrix in some cases. This disclosure is particularly focussed on ODVS techniques that apply a scaling factor, termed a ‘pre-scaler’, to a weaker sub-channel or sub-channels within the set of sub-channels so as to boost that/those sub-channel(s) relative to the other sub-channels.

Abstract: Methods, systems, devices, and apparatuses for wireless communications that support transmission diversity enhancement for uplink control channel are described. Generally, the described techniques provide for enhanced performance of an uplink control channel such as a physical uplink control channel (PUCCH) through the use of transmission diversity. In some cases, multiple input multiple output (MIMO) techniques may be supported for transmission of an uplink control channel for a given format suitable for transmission diversity enhancement. A resource block (RB) used in an uplink control channel transmission may contain a number of resource elements (REs) across one or more resource blocks. According to some aspects, a transmit diversity scheme may be employed at the RE level through application of different spatial precoders for different groups of REs of a given RB.

Abstract: A wireless communication device includes: a processing circuit configured to: receive, from an antenna array during a previous period, a first directional electromagnetic signal including beam sweeping reference symbols of a previous beam sweeping period; compute an estimated combined channel; estimate a dominant angle-of-arrival (AoA) of the first directional electromagnetic signal based on the estimated combined channel and a previous beamforming codebook including two or more beamforming vectors corresponding to different AoAs; construct an updated beamforming codebook based on the estimated dominant AoA and one or more remaining AoAs spaced apart from the estimated dominant AoA; receive, at the antenna array during a current period, a second directional electromagnetic signal including data symbols; determine a beamforming vector for data reception of the second directional electromagnetic signal based on the updated beamforming codebook; and detect the data symbols in the second directional electromagnet

Abstract: An automatic gain control system for a receiver, including: an automatic gain control loop (40) adapted to be coupled to both a first transimpedance amplifier (12) coupled to a first analog-to-digital converter (14) forming a first tributary and a second transimpedance amplifier (12) coupled to a second analog-to-digital converter (14) forming a second tributary; and an offset gain control voltage to gain balance a transimpedance amplifier gain of the first tributary and a transimpedance amplifier gain of the second tributary. The automatic gain control loop can be analog. Also, the automatic gain control loop can be implemented in hardware or firmware.

Abstract: The present disclosure provides example communication method and apparatuses. One example method includes obtaining first spatial relation parameter information, where the first spatial relation parameter information is spatial relation parameter information of a first target signal, and the first spatial relation parameter information includes a resource index of a first reference signal. First transmission information is determined based on the resource index of the first reference signal, where the first transmission information includes at least one of first antenna panel information or a first spatial characteristic parameter. The first target signal is received or sent based on the first transmission information.

Abstract: At least some aspects of the present disclosure provide for a method. In some examples, the method includes receiving 2-line data in an embedded Universal Serial Bus (eUSB) format. The method further includes encoding the 2-line data into a single signal. The single signal comprises a first symbol corresponding to a first state change of the 2-line data and a second symbol corresponding to a second state change of the 2-line data.

Abstract: A system for transmitting signals via serial links includes a plurality of lanes for combining data onto a transmission media, a skew detector configured to detect skew among two of the plurality of lanes, and a variable delay circuit controlled by the skew detector, configured to delay the start of a clock signal to circuitry of one of the plurality of lanes.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a receiver may receive, from a transmitter, an indication of a signature of a reconfigurable intelligent surface (RIS). The receiver may receive a signal that is transmitted by the transmitter and redirected by the RIS. The receiver may receive, from the RIS, a sequence associated with the signature of the RIS indicating that the signal is transmitted using a link associated with the RIS. Numerous other aspects are described.

Abstract: A communication device that generates a modulated signal with 32 QAM includes a modulator, a first encoder and a second encoder. The modulator generates a modulated signal by mapping each symbol in a data frame that includes transmission data, a first code, and a second code to a signal point among 32 QAM signal points. The first encoder encodes the data by using a first coding scheme to generate the first code. The second encoder encodes, by using a second coding scheme, a bit string formed from one specified bit in five bits allocated to each symbol in the data frame to generate the second code. The modulator performs mapping such that each pair of signal points adjacent to each other are arranged are different from each other in terms of a value of the one specified bit among the five bits.

Abstract: Various aspects of the present disclosure generally relate to wireless communication and testing. In some aspects, a device may receive information identifying a mount orientation of a wireless communication device, wherein the mount orientation indicates an orientation of a coordinate system of the wireless communication device relative to a coordinate system of a positioner. The device may capture measurement information at each position of a set of positions of the wireless communication device, wherein the set of positions comprises positions of the wireless communication device as the wireless communication device is rotated around an axis by the positioner, and wherein the measurement information is captured based at least in part on the mount orientation. The device may provide information identifying the measurement information. Some techniques and apparatuses described herein may use the measurement information to generate a codebook for beam generation. Numerous other aspects are provided.

Abstract: A technique of separating a sequence of modulation shift keying (MSK) symbols into a first portion and a second portion and separately comparing the first portion of the sequence of MSK symbols and the second portion of the sequence of MSK symbols against a first portion of a reference sequence of MSK symbols and a second portion of the reference sequence of MSK symbols allows a low complexity detection of a start field delimiter in a wireless communication packet.

Abstract: In described examples of a signal equalizer, a first filter stage is configured to perform adaptive equalization of crosstalk between a first signal component and a second signal component of a complex signal. A second filter stage is coupled serially to the first filter stage. The second equalizer stage is configured to perform separate adaptive equalization of the first signal component and separate adaptive equalization of the second signal component.

Abstract: Carrier aggregation (CA) may cause interference between operation on two or more carriers within a user equipment (UE). This interference can degrade signal quality on one or more of the carriers involved in the carrier aggregation, which may be referred to as “desensing” one or more carriers. One or more isolating buffers may be coupled at a down-conversion mixer at a point where the down-conversion mixer receives a signal from a transmission line for isolating the transmission line from other transmission lines. The isolating buffer may reduce the effect of interference between multiple transmission lines carrying different carriers during carrier aggregation (CA) operation. The isolating buffers may be used in an RF transceiver supporting both 5G sub-7 GHz and 5G mmWave wireless networks and carrier aggregation across sub-7 GHz and mmWave bands.

Abstract: Embodiments of methods and systems for supporting coexistence of multiple technologies in a Power Line Communication (PLC) network are disclosed. A long coexistence preamble sequence may be transmitted by a device that has been forced to back off the PLC channel multiple times. The long coexistence sequence provides a way for the device to request channel access from devices on the channel using other technology. The device may transmit a data packet after transmitting the long coexistence preamble sequence. A network duty cycle time may also be defined as a maximum allowed duration for nodes of the same network to access the channel. When the network duty cycle time occurs, all nodes will back off the channel for a duty cycle extended inter frame space before transmitting again. The long coexistence preamble sequence and the network duty cycle time may be used together.

Abstract: Various systems and methods disclosed herein describe improvements for beam management that leverage virtualization across a vertical polarization (V-Pol) and horizontal polarization (H-Pol). One or more of a user equipment (UE) and a base station may include an antenna array comprising V-Pol antenna elements and H-Pol antenna elements. The UE may determine a number of receive (Rx) beam of an Rx beam sweep are needed, signal this number to the base station, and perform the beam sweep according to one or both of the V-Pol and H-Pol. A UE may use group based beam reporting to indicate to the base station a transmit (Tx) beam upon which downlink MIMO using V-Pol and H-Pol may be supported by reporting a same transmission configuration indication (TCI) corresponding to the Tx beam for both a first Rx beam and a second Rx beam in a group based beam reporting message.

Abstract: The present disclosure discloses an on-chip synchronous self-repairing system based on a low-frequency reference signal. The system adopts a dual-input PLL stellate coupled structure or a dual-input PLL butterfly-shaped coupled structure, and delay of the whole loop is made to be an integral multiple of the reference signal by synchronizing the transmitted reference signal with the received reference signal, so as to ensure synchronization of local oscillation signal of each IC chip. The transmission wire based on an adjustable left-handed material is used as a delay wire to connect the dual-input PLL, thereby achieving low loss and reducing the physical distance of the delay wire. The system has the advantages of small area, low loss, strong adaptability and strict synchronization in various environments.

Abstract: A method for calibrating an isolator product includes receiving a calibration signal on a differential pair of nodes of a receiver signal path of a first integrated circuit die of the isolator product. The method includes generating a diagnostic signal having a level corresponding to an average amplitude of the calibration signal on the differential pair of nodes. The method includes configuring a programmable receiver signal path based on the diagnostic signal. Generating the diagnostic signal may include providing an analog signal based on a full-wave rectified version of the calibration signal on the differential pair of nodes. Generating the diagnostic signal may include converting the analog signal to a digital signal.

Abstract: A first wireless device may select a first beam for communication with a second wireless device from a first set of beams associated with a first beam level. A second set of beams may be associated with a second beam level. The first beam may be associated with a first children list. The first children list may be associated with a first subset of beams of the second set of beams. Each beam in the first subset of beams may have an envelope area that intersects an envelope area of the first beam. The first wireless device may select a second beam for communication with the second wireless device from the first subset of beams based on an envelope area of the second beam intersecting the envelope area of the first beam. The first wireless device may communicate with the second wireless device.

Abstract: A user equipment (UE) in a wireless communication system includes a transceiver and a processor. The transceiver receives information about an antenna system of a base station. The information includes a number of collocated antenna groups, and a number of antenna modules for each type of antenna modules in each of the collocated antenna groups. A collocated antenna group has at least two types of antenna modules: a first module with first antenna type and a second module with second antenna type. The transceiver also receives configuration information for a channel state information-reference signal (CSI-RS) resource. The transceiver also receives a CSI-RS based on the configuration information and acquires measurements. The processor determines a subset of antenna modules based on a comparison between the measurements and a criterion. The processor generates CSI for the subset of antenna modules. The transceiver transmits a CSI report comprising the CSI.

Abstract: Disclosed is a driver of an ethernet transmitter and a control method therefor. The driver has a first output port and a second output port connected to an ethernet receiver through a transmission line, and comprises: a signal conversion module for converting differential current signals into a first voltage signal and a second voltage signal; a first driving module adjusting a swing of the first voltage signal, to obtain a first output signal having a voltage equal to the first voltage signal; a second driving module adjusting a swing of the second voltage signal, to obtain a second output signal having a voltage equal to the second voltage signal. An architecture having a relatively small area is realized, and the ethernet transmitter meets the requirement on a large output swing in 10BASE-T mode.