Abstract: Example wireless communication methods and apparatus are described. In one example method, a relay device receives a first signal sent by a first device, where the first signal carries a plurality of bits. The relay device decodes the first signal to determine first information corresponding to each of a plurality of first bits. The first information corresponding to each first bit is determined based on a probability that the first bit is 1 and a probability that the first bit is 0. The relay device sends the first information in a second signal to a second device, so that the second device can use the first information to decode the first signal.

Abstract: Apparatuses, methods, and systems are disclosed for transmitting signals with delays. One method includes determining, at a user equipment, a first transmit signal based on a set of modulation symbols. The method includes determining a second transmit signal based on the first transmit signal, wherein the second transmit signal is a delayed copy of the first transmit signal that is delayed by a delay, and the delay is less than a maximum value. The method includes transmitting the first transmit signal from a first antenna of the user equipment. The method includes transmitting the second transmit signal from a second antenna of the user equipment.

Abstract: Techniques and apparatuses are described for adaptive phase-changing device power-saving operations. In aspects, a base station determines to transition an adaptive phase-changing device (APD) into an enabled APD-PS mode and determines an APD-PS configuration for the APD that specifies a framework for operating in the enabled APD-PS mode. The base station then directs the APD to operate in the enabled APD-PS mode by communicating the APD-PS configuration to the APD and transmits or receives wireless signals using a surface of the APD and based on the APD-PS configuration.

Abstract: A radio frequency, RF, receiver circuit that is configured to simultaneously monitor a two or more different RF frequencies. The RF receiver circuit uses a sub-sampler to sub-sample an RF signal that is at any of the monitored RF frequencies, and the sub-sampled signal is then demodulated and a digital code that was encoded in the RF signal is recovered. The RF receiver circuit may be particularly low power, in part owing to using the same sub-sampler for each of the two or more monitored RF frequencies, and not relying on superheterodyning. Furthermore, monitoring two or more different RF frequencies simultaneously means that signals received on the monitored RF frequencies may be acted on very quickly. These characteristics make the RF receiver circuit particularly suitable for use in low-power wake-up receivers, such as Bluetooth Low Energy (BLE) wake-up receivers.

Abstract: Solutions pertaining to allocating antennas of a user equipment (UE) between connections using different RATs are proposed. A UE has a first connection to a first network and a second connection to a second network, each connection employing a respective radio access technology (RAT). During operation, the UE may identify a precondition of reconfiguring the connections. For example, the UE may intend to change a multi-input-multi-output (MIMO) setting of the first connection in order to release some antennas that can be allocated to the second connection to relieve a communication bottleneck thereof. Prior to reconfiguring the connections, the UE may communicate its intent to the first network. The UE may not reconfigure the connections until a confirmation is received from the first network.

Abstract: A communication system for point to multipoint communications by grouping client devices based on associated modes is provided. In one example implementation, point to multipoint communication improvements are achieved by grouping a plurality of client devices by their optimal modes for communication. For example, the communication system can determine, based on channel quality indicators (CQIs) that two client devices of a plurality of client devices are associated with an optimal first mode of a modal antenna. The system can group the two client devices into a first group, the first group associated with communication using the first mode of the modal antenna. The modal antenna can communicate with the first group using the first mode of a modal antenna during a single frame of communication.

Abstract: A clock data recovery circuit includes an inphase-quadrature (I-Q) merged phase interpolator circuit configured to generate a first clock pair and a second clock pair from a plurality of reference clock signals, the plurality of reference clock signals having different phases, the first clock pair comprising an I clock signal and an inverted I clock signal, and the second clock pair comprising a Q clock signal and an inverted Q clock signal, a sampler circuit configured to sample input data based on the first clock pair and the second clock pair, and a control circuit configured to control phases of the first clock pair and the second clock pair, the controlling including providing a control signal to the I-Q merged phase interpolator circuit based on a sampling result of the sampler circuit, the I-Q merged phase interpolator circuit is configured to share analog inputs based on the control signal.

Abstract: Different frequency channel allocation techniques exist for transmissions. These frequency channel allocation techniques do not explicitly take into account the position of the terminal equipment and the antenna characteristics associated therewith. In addition, these techniques consume significant calculation power in order for the frequency channels to be allocated in the best possible way between the various terminal devices. The communication method is based on the selection of a single current transmission frequency using a metric referred to as metric representative of an overlap of collecting surfaces. The overlap metric evaluates an interference level associated with a spatial overlap between collecting surfaces of a first terminal device and an interfering device for a radio signal transmission frequency.

Abstract: A method and a device for receiving a PPDU in a wireless LAN system are presented. Specifically, a reception STA receives a PPDU from a transmission STA through a broadband and decodes the PPDU. The broadband is a 320 MHz band or a 160+160 MHz band. The PPDU includes an STF signal. The STF signal is generated on the basis of a first STF sequence for a broadband. The first STF sequence is a sequence of which a phase rotation is applied to a sequence in which a second STF sequence is repeated. The second STF sequence is an STF sequence for a 80 MHz band defined in an 802.11ax wireless LAN system. If the broadband is a 320 MHz band, the first SFT sequence is a sequence in which preset sequence M is repeated, and is defined to be the same as {M 1 ?M 0 ?M 1 ?M 0 M 1 ?M 0 ?M 1 ?M 0 ?M ?1 M 0 M ?1 M 0 ?M ?1 M 0 M ?1 M}*(1+j)/sqrt(2)).

Abstract: Disclosed is a transmission scheme for transmitting a first modulated signal and a second modulated signal over the same frequency at the same time. According to the transmission scheme, a precoding weight multiplying unit multiplies a baseband signal after a first mapping and a baseband signal after a second mapping by a precoding weight and outputs the first modulated signal and the second modulated signal. In the precoding weight multiplying unit, precoding weights are regularly hopped.

Abstract: A receiver includes an interface configured to receive a data signal based on an n-level pulse amplitude modulation (PAM-n) in which n is an integer equal to or greater than 4. The interface may include an analog-digital converting circuit configured to adjust a reference voltage, for distinguishing second bit data from the data signal in a second section, based on first bit data converted from the data signal in a first section and the first bit data converted from the data signal in the second section, the second section being after the first section.

Abstract: This disclosure relates to the wireless communication field, for example, is applied to a wireless local area network supporting the 802.11 standard, and in particular, to a physical layer protocol data unit (PPDU) transmission method and a related apparatus. The method includes: A first communication device generates and sends a first PPDU, where the first PPDU carries rotation coefficient indication information indicating a rotation coefficient of at least one field, which comprises at least one of an extremely high throughput short training field (EHT-STF) or an extremely high throughput long training field (EHT-LTF) and correspond to a frequency segment on which the first PPDU is transmitted, and the first PPDU is a sub-PPDU in an aggregated PPDU or a PPDU on a frequency segment among at least one PPDU in a multi-frequency segment transmission mode.

Abstract: A wireless communication device (10; 100) performs wireless transmissions via an antenna array of the wireless communication device (10; 100). The antenna array comprises multiple antenna elements with a first polarization, a second polarization, and a third polarization. For at least some of the wireless transmissions, the wireless communication device (10; 100) performs beamforming processing by, for the first polarization, weighting antenna signals each corresponding to a respective one of the multiple antenna elements by a first beamforming vector, for the second polarization, weighting antenna signals each corresponding to a respective one of the multiple antenna elements by a second beamforming vector, and for the third polarization, weighting antenna signals each corresponding to a respective one of the multiple antenna elements by a third beamforming vector.

Abstract: A transmission device includes: a weighting synthesizer that generates a first precoded signal and a second precoded signal from a first baseband signal and a second baseband signal, respectively; a phase changer that applies a phase change of i×?? to the second precoded signal; an inserter that inserts a pilot signal into the second precoded signal applied with the phase change; and a phase changer that applies a phase change to the second precoded signal applied with the phase change and inserted with the pilot signal. The weighting synthesizer performs, in the precoding process, a calculation that uses F = ( e j ? ? 11 e j ( ? 11 + ? 4 ) e j ? ? 21 e j ( ? 21 + ? + ? 4 ) ) on the first baseband signal and the second baseband signal modulated via a modulation scheme of QPSK.

Abstract: A BLE system includes a network controller, peripherals, and central. As one of the peripherals begins to roam, the current central device in a connection with the peripheral detects when the peripheral device is moving away from the current central. Other centrals receive requests to perform coordinated sensing of transmissions from the peripheral device to the current central device. The coordinated sensing includes the other central devices monitoring transmissions from the peripheral device to determine respective received signal strength indicators (RSSIs) on at least one frequency corresponding to a frequency hopping pattern of the connection. The other centrals report the coordinated sensing results to the network controller which determines a next central based, at least in part, on the sensed RSSIs. The network controller sends blacklists to centrals that are not the next central and the peripheral disconnects from the current central, advertises, and reconnects with the next central.

Abstract: Various embodiments disclosed herein provide for a low complexity transmitter structure for active antenna arrays by reducing the number of digital predistortion extraction loops that need to be performed. Digital predistortion (DPD) corrects any non-linearities in a power amplifier. By determining which power amplifiers have similar characteristics in an array, and thus may use similar predistortion coefficients, once the DPD coefficients are determine for one of the grouped power amplifiers, DPD can be performed on each of the grouped power amplifiers based on the DPD coefficients.

Abstract: A system and method for providing multi-input multi-output (MIMO) feeder links for a multibeam satellite system. The method includes configuring a X×Y MIMO antenna system using X-antennae having dominant line-of-sight (LoS) of Y-antennae; transmitting, simultaneously, a Tx signal as X Tx signals on a MIMO channel with the X-antennae; receiving the X Tx signals on the MIMO channel with the Y-antennae as Y Rx signals, wherein each of the Y-antennae generate one of the Y Rx signals; and ground-interference processing the X Tx signals or the Y Rx signals to recover the Tx signal; satellite-interference processing the X Tx signals or the Y Rx signals to recover the Tx signal. In the method, the ground interference processing includes countermeasures as either pre-interference processing when the X-antennae are disposed on a ground or post-interference processing when the X-antennae are disposed in a Geosynchronous orbit satellite.

Abstract: This disclosure relates to techniques for providing an artificial intelligence based framework for performing channel state information reporting in a wireless communication system. A cellular base station may provide system information for a cell to a wireless device. The system information may indicate that the cell supports artificial intelligence based channel state information reporting. The wireless device may provide wireless device capability information to the cellular base station. The capability information may indicate that the wireless device supports artificial intelligence based channel state information reporting. The wireless device may determine an artificial intelligence model to use to perform channel state information reporting with the cell, and may perform channel state information reporting using the selected artificial intelligence model.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a first transmit-receive point (TRP), a first channel state information reference signal (CSI-RS) associated with the first TRP and a first beam. The UE may receive, from the first TRP or a second TRP, a second CSI-RS associated with the first TRP or the second TRP, wherein the second CSI-RS is associated with a second beam. The UE may transmit, to the first TRP or the second TRP, an indication of a delta value between a measurement of the first CSI-RS and a measurement of the second CSI-RS. Numerous other aspects are described.

Abstract: Techniques for quickly and accurately determining whether a channel is being used for transmission of data using one of a plurality of communications protocols for low power signals using random data of a packet are disclosed. The techniques increase sensitivity and reduce the false alarm rate for a wide range of signal and noise levels. A noise detection technique uses an adaptive window size for fast noise detection that increases the rate of scanning channels during a signal identification period. In a BLE1M detection mode, detection of clusters of zero frequency deviation are used to reduce the false detection rate. Adaptive Zigbee symbol detection improves detection sensitivity beyond ?97 dBm. The techniques use a chip-based differential to generate frequency deviation samples for Zigbee detection or data filtering frequency deviation samples generated using sample-based differentials based on an oversampled received signal to improve the signal-to-noise ratio.