Abstract: Methods and systems of obtaining a beamforming matrix, the method comprising inputting PMI feedback from a user equipment (UE), inputting partial channel estimation derived from sounding reference signal (SRS) switching, and composing a precoding matrix using the PMI feedback and partial channel estimation.

Abstract: A system comprising a first apparatus, a second apparatus and a third apparatus, wherein the first apparatus is configured to provide, to a second apparatus, information regarding a number of antennas and/or an oversampling factor; the second apparatus is configured to transmit a plurality of beams in accordance with the information received from the first apparatus regarding the number of antennas and the oversampling factor; the third apparatus configured to receive a plurality of beamformed reference signals transmitted by the second apparatus, obtain measurement results for at least two of the plurality of beamformed reference signals, wherein the measurement results comprise one or more of: reference signal received power value, beam identifier, a value indicating uncertainty of the accuracy of the reference signal received power value; and transmit the measurement results to the second apparatus; and wherein the second apparatus is further configured to: process the received measurement results to obtai

Abstract: Methods and apparatuses are provided in which frequency domain (FD) interpolation is performed on wideband reference signal (RS) resource elements (REs) to generate channel estimates on corresponding RS symbols. Denoising may be performed on the channel estimates in a time domain (TD) or a delay-Doppler domain (DD). Learning-based channel estimation (LCE) is applied on the channel estimates using a neural network (NN) to generate refined channel estimates on the corresponding RS symbols. Time domain (TD) interpolation is performed on the refined channel estimates to produce a channel estimate across symbols.

Abstract: A method may include determining, for a channel, a target component of precoding information, determining at least a part of the precoding information based on the target component and a decompressed component of the precoding information, and sending, from a user equipment, the at least a part of the precoding information. Determining the at least a part of the precoding information may be based on a correlation between the target component and the decompressed component. The at least a part of the precoding information may include a vector of coefficients. The vector of coefficients may include a vector of complex numbers. At least one of the complex numbers may include an amplitude representing a scaling coefficient and a phase representing a rotation coefficient. The target component may include a target matrix. The decompressed component may include a decompressed matrix. The target matrix may include a linear combination coefficients matrix.

Abstract: Methods and apparatus are provided in which channel matrices at time slots are estimated using reference signals received from a base station (BS) at the time slots. A sequence of channel matrices at future time slots are estimated using the estimated channel matrices as input to a neural network (NN) trained based on known sets of past and future channel matrices. A parameter is determined using at least one channel matrix from the sequence of channel matrices.

Abstract: A system and a method are disclosed for performing data-aided channel tracking for a subcarrier, including obtaining a reference channel estimate (CE) at a first time instance using a reference signal; determining, based on the obtained reference CE and based on received data symbols, a data-aided CE at a second time instance that is subsequent to the first time instance; and sequentially determining one or more additional data-aided CEs, for one or more time instances subsequent to the second time instance, based on a data-aided CE obtained at a previous time instance and based on the received data symbols.

Abstract: A method and system include a symbol processing block to generate log likelihood ratios (LLRs) associated with one or more data symbols. The method and system include a channel estimation (CE) module to receive the LLRs from the symbol processing block, and to process iterative CE (ItCE) for new radio (NR) based at least on reference signals and the LLRs. The CE module can process the ItCE with a granularity of one or more resource blocks (RBs) based at least on pilot resource elements (REs) and virtual pilot REs obtained from the LLRs. The CE module can process the ItCE based at least on a frequency domain orthogonal cover codes (FD-OCC) structure of the reference signals. The reference signals can be demodulation reference signals (DMRS) configured in 5G NR. The CE module can process the ItCE by updating a CE result by adding a quantity that represents a contribution obtained from virtual pilot REs.

Abstract: The disclosure provides methods of providing implicit channel state information (CSI) feedback from a user equipment (UE). A method performed by a first device includes determining a feedback parameter selection decision metric; selecting a particular method from a plurality of methods, based on the feedback parameter selection decision metric; determining, based at least in part on the particular method, and based on a configuration of an associated second device, one or more values associated with precoding; and transmitting the one or more values to the second device.

Abstract: Methods and apparatus are provided in which channel matrices at time slots are estimated using reference signals received from a base station (BS) at the time slots. A sequence of channel matrices at future time slots are estimated using the estimated channel matrices as input to a neural network (NN) trained based on known sets of past and future channel matrices. A parameter is determined using at least one channel matrix from the sequence of channel matrices.

Abstract: The disclosure provides a method of providing implicit channel state information (CSI) feedback from a user equipment (UE). The method includes determining a precoding matrix indicator (PMI) selection decision metric, selecting one of a sub-band (SB) linear combination coefficient (LCC) selection method, a wideband (WB) LCC selection method, or a sub-band group (SBG) LCC selection method, based on the determined PMI selection decision metric, determining, using the selected LCC selection method, PMI indices based on sub-bands configured by a base station, and transmitting the determined PMI indices to the base station.

Abstract: A method may include determining, for a channel, a target component of precoding information, determining at least a part of the precoding information based on the target component and a decompressed component of the precoding information, and sending, from a user equipment, the at least a part of the precoding information. Determining the at least a part of the precoding information may be based on a correlation between the target component and the decompressed component. The at least a part of the precoding information may include a vector of coefficients. The vector of coefficients may include a vector of complex numbers. At least one of the complex numbers may include an amplitude representing a scaling coefficient and a phase representing a rotation coefficient. The target component may include a target matrix. The decompressed component may include a decompressed matrix. The target matrix may include a linear combination coefficients matrix.

Abstract: The disclosure provides a method of providing implicit channel state information (CSI) feedback from a user equipment (UE). The method includes determining a precoding matrix indicator (PMI) selection decision metric, selecting one of a sub-band (SB) linear combination coefficient (LCC) selection method, a wideband (WB) LCC selection method, or a sub-band group (SBG) LCC selection method, based on the determined PMI selection decision metric, determining, using the selected LCC selection method, PMI indices based on sub-bands configured by a base station, and transmitting the determined PMI indices to the base station.

Abstract: A system and method for storing a power delay profile in compressed form. In some embodiments, the method includes: identifying, in a power delay profile including a first group of taps, a first arrival tap corresponding to a first arrival path; identifying a first subset of taps, the first subset being a subset of the first group and including the first arrival tap; identifying a second subset of taps, the second subset being a subset of the first group and being disjoint from the first subset; and storing, in a memory, the union of the first subset and a proper subset of the second subset.

Abstract: A system comprising a first apparatus, a second apparatus and a third apparatus, wherein the first apparatus is configured to provide, to a second apparatus, information regarding a number of antennas and/or an oversampling factor; the second apparatus is configured to transmit a plurality of beams in accordance with the information received from the first apparatus regarding the number of antennas and the oversampling factor; the third apparatus configured to receive a plurality of beamformed reference signals transmitted by the second apparatus, obtain measurement results for at least two of the plurality of beamformed reference signals, wherein the measurement results comprise one or more of: reference signal received power value, beam identifier, a value indicating uncertainty of the accuracy of the reference signal received power value; and transmit the measurement results to the second apparatus; and wherein the second apparatus is further configured to: process the received measurement results to obtai

Abstract: Methods and systems of obtaining a beamforming matrix, the method comprising inputting PMI feedback from a user equipment (UE), inputting partial channel estimation derived from sounding reference signal (SRS) switching, and composing a precoding matrix using the PMI feedback and partial channel estimation.

Abstract: Methods and systems of obtaining a beamforming matrix, the method comprising inputting PMI feedback from a user equipment (UE), inputting partial channel estimation derived from sounding reference signal (SRS) switching, and composing a precoding matrix using the PMI feedback and partial channel estimation.

Abstract: Methods and systems of obtaining a beamforming matrix, the method comprising inputting PMI feedback from a user equipment (UE), inputting partial channel estimation derived from sounding reference signal (SRS) switching, and composing a precoding matrix using the PMI feedback and partial channel estimation.

Abstract: A receiver circuit for separating a plurality of layers multiplexed in an orthogonal frequency domain multiplexed (OFDM) signal includes: a descrambling sub-circuit configured to descramble a plurality of signals received on non-adjacent subcarriers of the OFDM signal to generate a plurality of descrambled signals; an inverse fast Fourier transform sub-circuit configured to transform the descrambled signals from a frequency domain to a received signal including a plurality of samples in a time domain; and a layer separation sub-circuit configured to separate the layers multiplexed in the received signal by: defining a first time domain sampling window and a second time domain sampling window in accordance with a size of the inverse fast Fourier transform; extracting one or more first layers from the samples in the first time domain sampling window; and extracting one or more second layers from the samples in the second time domain sampling window.

Abstract: A receiver circuit for separating a plurality of layers multiplexed in an orthogonal frequency domain multiplexed (OFDM) signal includes: a descrambling sub-circuit configured to descramble a plurality of signals received on non-adjacent subcarriers of the OFDM signal to generate a plurality of descrambled signals; an inverse fast Fourier transform sub-circuit configured to transform the descrambled signals from a frequency domain to a received signal including a plurality of samples in a time domain; and a layer separation sub-circuit configured to separate the layers multiplexed in the received signal by: defining a first time domain sampling window and a second time domain sampling window in accordance with a size of the inverse fast Fourier transform; extracting one or more first layers from the samples in the first time domain sampling window; and extracting one or more second layers from the samples in the second time domain sampling window.

Abstract: A receiver circuit for separating a plurality of layers multiplexed in an orthogonal frequency domain multiplexed (OFDM) signal includes: a descrambling sub-circuit configured to descramble a plurality of signals received on non-adjacent subcarriers of the OFDM signal to generate a plurality of descrambled signals; an inverse fast Fourier transform sub-circuit configured to transform the descrambled signals from a frequency domain to a received signal including a plurality of samples in a time domain; and a layer separation sub-circuit configured to separate the layers multiplexed in the received signal by: defining a first time domain sampling window and a second time domain sampling window in accordance with a size of the inverse fast Fourier transform; extracting one or more first layers from the samples in the first time domain sampling window; and extracting one or more second layers from the samples in the second time domain sampling window.