Abstract: The apparatus may be a UE. The UE may be configured to measure, over a time interval, a plurality of instances of a signal received from a serving device (e.g., a base station or serving UE). The UE may further be configured to adjust, based on at least two previously measured instances of the signal, a sampling rate associated with the signal received from the serving device. The UE may further be configured to maintain a particular number (e.g., 2-10) of previously measured instances of the signal, where adjusting the sampling rate is based on the maintained particular number of previously measured instances. The particular number of previously measured instances of the signal may be used to calculate a gradient of the measurements to identify a sampling rate associated with the calculated gradient.

Abstract: High-speed communication links with self-aligned scrambling on a communication link that sends scrambled signals may include a slave device that may self-align by initially detecting an unscrambled preamble symbol and more particularly detect an edge of the unscrambled preamble symbol. Based on the detected edge, a fine alignment adjustment may be made by testing subsequent scrambled data for a repeated pattern such as an IDLE symbol by comparing the repeated pattern to a candidate scrambled sequence that has been received through the communication link. The comparison may use an exclusive OR (XOR) circuit on some bits to derive a scrambler seed that is used to test for a match for the remaining bits. If there is a match, the scrambler seed and frame alignment have been detected and alignment is achieved.

Abstract: An approach is described that includes receiving a CSI report, where the CSI report includes a channel quality indicator (CQI), a rank indicator (RI), and a precoding matrix indicator (PMI). The approach further includes constructing a precoding matrix based on a linear combination of a plurality of mutually orthogonal digital Fourier transformation (DFT) spatial beams, and determining a number of bits for the PMI of the precoding matrix. The approach also includes determining a space frequency matrix based, at least in part, on the number of bits for the PMI and the precoding matrix, and compressing the space frequency matrix. Finally, the approach includes determining a compressed PMI based, at least in part, on the space frequency matrix.

Abstract: The present disclosure relates to methods and devices for wireless communication of an apparatus, e.g., a UE and/or a base station. In one aspect, the apparatus may measure a plurality of beams from a base station or a UE, the plurality of beams corresponding to a plurality of subbands of a wideband channel. The apparatus may also determine whether the plurality of beams include one or more candidate beam groups for each subband of the plurality of subbands. Additionally, the apparatus may transmit, upon determining that the plurality of beams include one or more candidate beam groups for at least one subband of the plurality of subbands, an indication of the one or more candidate beam groups for the at least one subband of the plurality of subbands.

Abstract: A method for decoding an RF signal bearing a sequence of transmitted symbols modulated by CPM. The method includes, at the receiver: estimating model parameters {h, ?, ?0} among which h characterizes a modulation index, ? characterizes a carrier frequency offset and ?0 characterizes an initial phase offset, and detecting received symbols corresponding to said transmitted symbols of the sequence, wherein, at time nT where T is a symbol duration, the parameters {h, ?, ?0} are estimated by solving a system of three linear equations whose: three unknowns {?(n), {circumflex over (?)}(n), {circumflex over (?)}0(n)} are respectively function of said model parameters {h, ?, ?0}, and coefficients {B(n), C(n), D(n), F(n), G(n), H(n), v1(n), v2(n), v3(n)} are computed in a recursive way in function of: a sequence of symbols {ân} corresponding to the sequence of transmitted symbols up to time nT, and measured phases {?k} of samples {yk} of the RF signal received from time (n?1)T to time nT.

Abstract: A method, system, network node and wireless device for beam selection priority in a wireless communication system are disclosed. According to one aspect of the disclosure, a wireless device is provided. The wireless device is provided with different beam indications for reception of at least a first signal and a second signal. The wireless device includes processing circuitry configured to receive the first signal of a first signal type on a beam indicated by one of the beam indications, the first signal type having a higher priority than a second signal type of the second signal.

Abstract: A method of operating a radio receiver device comprises receiving a plurality of signals with a plurality of corresponding frequencies; applying respective gains to each of the plurality of signals; and storing the gain applied to each signal and its corresponding frequency. The method comprises subsequently receiving a further signal with a further frequency; and applying a further gain to the further signal. The further gain is determined using at least one of the stored gains according to a difference between the further frequency and at least one of the plurality of corresponding frequencies.

Abstract: Disclosed herein are systems, methods, and devices for sensor systems, in which one or more sensors are linked with a host processor. The sensors may transmit a sequence of frames, such as video frames to the host processor. The methods may include determining and/or adjusting a period or frequency of a first clock or oscillator in a sensor device, based on two signals applied by the sensor to a sequence of frames. The host processor may use its own clock or oscillator to determine an elapsed time between the two signals to determine the period or frequency of the first clock and may apply an adjustment to the sensor's clock. Other embodiments are directed to sensor systems in which two or more sensors may transmit respective sequences of frames to the host processor. The methods may provide the host processor a means to synchronize transmission of the frames from the sensors. The systems, methods, and devices may avoid the need for dedicated timing or synchronization lines.

Abstract: A method of beamforming is provided. A single non-linear equalization (NLEQ) coefficient set is generated in beamspace, the single NLEQ coefficient set configured to characterize non-linear behavior of a system having an array of N elements. M parallel digital signals are received, for transmission by N channels, respectively, the N channels corresponding to the N elements. Each of the M respective parallel digital signals are equalized, using an NLEQ filter based on the single NLEQ coefficient set, wherein the single NLEQ coefficient set is used for each of the N elements and wherein the equalizing is configured to generate a set of M linearized parallel digital signals. Using a single summer, the M linearized parallel digital signals are summed, to produce one or more beamspace channelized output signals.

Abstract: Embodiments presented herein relate to a method for reciprocity-based transmission in a radio communication network. The method is performed in a base station and may include obtaining a channel estimation of Rx quantities of a set of receive, Rx, and transmit, Tx, distribution networks, obtaining a channel estimation of Rx quantities of a set of Rx distribution networks, and performing reciprocity-based transmission with utilization of the obtained channel estimation of Rx quantities of both the set of Rx and Tx distribution network and the set of Rx distribution network, whereby channel estimation of Rx quantities of more Rx distribution networks than Tx distribution networks are utilized for the reciprocity-based transmission. A method, a base station, a wireless device, a computer programs and a computer program product for reciprocity-based beamforming in a radio communication network are also presented.

Abstract: A multiple subcarriers modulator (200) for a backscatter device comprised in a backscatter communication system is disclosed. The multiple subcarriers modulator comprises an antenna switch (210) and an impedance matrix (220) comprising a number of impedances. The multiple subcarriers modulator further comprises a first modulator (230) configured to generate a first modulated signal by modulating a first data stream with a first subcarrier having a first frequency and a second modulator (240) configured to generate a second modulated signal by modulating a second data stream with a second subcarrier having a second frequency. The multiple subcarriers modulator further comprises a summing circuit (250) configured to generate a control signal by combining the first and second modulated signals and a switch controller (270) configured to control the antenna switch such that one of the impedance in the impedance matrix is connected to an antenna based on the control signal.

Abstract: Solutions to determine how to form beams when co-operating multiple-input multiple-output antenna panels are used are disclosed. Beams are formed according to sets of beamforming weights corresponding to minimized total transmit power from an antenna array of interest to served terminal devices. Optimization to minimize total transmit power subject to a predefined constraint on a minimum allowable expected value of signal-to-interference-plus-noise ratio, SINR, is performed. In the optimization expected values of SINR for a terminal device are calculated based on based on the sets of beamforming weights for at least the served terminal devices, and weighted second order statistics, wherein a weighting factor for second order statistics between the served terminal devices and the antenna array is one and weighting factors for the other second order statistics less than one. The second order statistics are included in maintained channel state information.

Abstract: This application provides a data sending method and an apparatus. The method includes performing, by a node, soft modulation to generate a modulation symbol. The method also includes preprocessing, by the node, the modulation symbol to obtain to-be-sent data. The preprocessing includes one or more of layer mapping, antenna port mapping, precoding, or transform precoding. The method further includes mapping, by the node, the to-be-sent data to a physical resource, and sending the to-be-sent data by way of the physical resource.

Abstract: A method performed by a wireless device (510, 800, 1200) for reporting channel state information (CSI) for a downlink channel is disclosed. The method comprises transmitting (601, 705) a CSI report for the downlink channel to a network node (560, 1100), the CSI report comprising: a set of reported coefficients; an indication of how the network node is to interpret the set of reported coefficients; and an indication of a payload size of the set of the reported coefficients.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a video-based channel state information (VCSI) configuration. The UE may cause a camera to capture channel state information (CSI) video based at least in part on one or more VCSI measurement parameters indicated in the VCSI configuration. The UE may derive, from the CSI video, one or more VCSI measurements using a machine learning model indicated in the VCSI configuration. The UE may transmit a VCSI report that includes the one or more VCSI measurements. Numerous other aspects are described.

Abstract: Provided are a method and device for determining precoding, a method and device for detecting data, a storage medium and an electronic device. The method for determining precoding includes: receiving, by a first communication node, a precoding matrix indicator (PMI) sent by a second communication node; and determining a precoding matrix used on a control channel according to the PMI and a precoding parameter; where the precoding parameter includes at least one of: a PMI delay, the number of repetitions of the control channel, an aggregation level of the control channel, a candidate resource of the control channel, a starting physical resource block (PRB) sequence number of the control channel, a repetition resource group of the control channel, or a PRB set of the control channel.

Abstract: A low complexity multiple input multiple output transmitter that transmits a single codeword per channel is disclosed herein. Instead of sending multiple codewords per channel for transmissions that support higher data layer transmissions, the transmitter can send single codewords over multiple channels in order to improve spectral efficiency over a range of signal to interference plus noise ratios. For instance, if a downlink transmission to a user equipment (UE) has a rank of 4, capable of supporting 4 data layers, instead of sending 2 or more codewords over a single downlink control channel, the transmitter can schedule multiple control channels and transmit a single codeword per channel. The transmitter can also include in the signaling to the UE that the multi-codewords are included in multiple downlink control channels.

Abstract: A method of mitigating interference in a received wireless signal by adaptive digital filtering efficiently deploys computational resources by using at least one of a DDC, weight generator, and scrubber to perform calculations necessary to generate a plurality of output streams. Embodiments transition a weight generator and scrubber between receiver frequencies according to a known frequency hopping pattern of an FHSS transmission. Other embodiments dedicate scrubbers to receiver frequencies while transitioning a weigh generator between the frequencies to generate sets of weights that can be persistently used by the scrubbers. Embodiments generate sets of weights according to one received multipath signal copy, and then apply the generated weights to filter additional multipath copes received at the same frequency. Various embodiments dedicate a DDC to each receive frequency to form a bank of down-converted outputs, from among which each weigh generator can select primary and reference inputs.

Abstract: It is provided a method for configuring abeam direction of a set of antennas of an antenna site for a radio communication system. The method being performed in a beam direction configurer and comprises the steps of: obtaining a desired beam direction; configuring a coarse beam director, being configurable to provide only a fixed number of beam directions for the set of antennas, to provide a beam direction being closest to the desired beam direction; and configuring a fine beam director, being configurable more finely than the coarse beam director, to be in a fine beam direction such that a resulting beam direction for set of antennas, being a combination of the beam direction of the coarse beam director and the fine beam director, corresponds to the desired beam direction.

Abstract: A system for transmitting and receiving radio signals is disclosed. The system includes a controller having a modem and a transmission amplifier module connected to the modem, an antenna unit arranged at a distance from the controller and having an antenna and a reception amplifier module connected to the antenna, and a high-frequency cable connecting the controller and the antenna unit.