Abstract: Described is a method of decoding a physical sidelink shared channel (PSSCH) involving physical sidelink control channel (PSCCH) resource grid search space reduction, timing offset (TO) estimation, and reference symbol identification. Resource grid search space reduction may include identifying resource blocks (RBs) having a signal power below a first threshold such that said RBs can be excluded from further processing. Search space reduction may additionally or alternatively include identifying RB pairs where a difference in signal power between the RBs comprising each pair of RBs is above a second threshold and excluding any such said RB pairs from further processing. TO compensation may include circularly correlating TO-compensated received DMRSs and their corresponding local DMRSs to obtain energy or power profiles.

Abstract: Systems and methods that provide reconfigurable shifter configurations supporting multiple instruction, multiple data (MIMD) are described. Shifters implemented according to embodiments support multiple data shifts with respect to an instance of data shifting, wherein multiple individual different data shifts are implemented at a time in parallel. Reconfigurable segmented scalable shifters of embodiments, in addition being reconfigurable for scalability in supporting data shifting with respect to various bit lengths of data, are configured to support data shifting of differing bit lengths in parallel. The data shifters of embodiments implement segmentation for facilitating data shifting with respect to differing bit lengths. Different data shift commands may be provided with respect to each such segment, thereby facilitating multiple data shifts in parallel with respect to various bit lengths of data.

Abstract: Systems and methods providing low-density parity-check (LDPC) decoder configurations capable of decoding multiple code blocks in parallel are described. Parallel LDPC decoders of embodiments can be reconfigured to simultaneously decode multiple codewords with reconfigurable size. In operation of embodiments of a parallel LDPC decoder, a plurality of active portions of the decoder logic are configured for parallel processing of a plurality of code blocks, wherein each active region processes a respective code block. The decoder logic active portions of embodiments are provided using a reconfigurable segmented scalable cyclic shifter supporting multiple instruction, multiple data (MIMD), wherein multiple individual different data shifts are implemented with respect to a plurality of code blocks in an instance of data shifting operation.

Abstract: Described is a method of reducing uplink inter-cell interference in a cellular communications network. The method comprises identifying in a cell any user equipments (UEs) which are susceptible to interference (ISUs) from another UE, particularly another UE in a neighboring cell. The method includes identifying in said cell any UEs causing interference (ICUs) to at least one neighboring cell and, more particularly, causing interference to a UE in a neighboring cell. The identified ISUs and ICUs are combined into a priority list for frequency resource reservation or allocation in said cell. The method may include limiting the identification of ISUs and ICUs to a selected number of UEs within the cell.

Abstract: Systems and methods that provide reconfigurable shifter configurations supporting multiple instruction, multiple data (MIMD) are described. Shifters implemented according to embodiments support multiple data shifts with respect to an instance of data shifting, wherein multiple individual different data shifts are implemented at a time in parallel. Reconfigurable segmented scalable shifters of embodiments, in addition being reconfigurable for scalability in supporting data shifting with respect to various bit lengths of data, are configured to support data shifting of differing bit lengths in parallel. The data shifters of embodiments implement segmentation for facilitating data shifting with respect to differing bit lengths. Different data shift commands may be provided with respect to each such segment, thereby facilitating multiple data shifts in parallel with respect to various bit lengths of data.

Abstract: Systems and methods providing low-density parity-check (LDPC) decoder configurations capable of decoding multiple code blocks in parallel are described. Parallel LDPC decoders of embodiments can be reconfigured to simultaneously decode multiple codewords with reconfigurable size. In operation of embodiments of a parallel LDPC decoder, a plurality of active portions of the decoder logic are configured for parallel processing of a plurality of code blocks, wherein each active region processes a respective code block. The decoder logic active portions of embodiments are provided using a reconfigurable segmented scalable cyclic shifter supporting multiple instruction, multiple data (MIMD), wherein multiple individual different data shifts are implemented with respect to a plurality of code blocks in an instance of data shifting operation.

Abstract: Provided is a method for determining a Hybrid Automatic Repeat Request (HARQ) transmission signal. The method comprises receiving soft bits from a wireless communication physical channel uplink signal, said received soft bits being deemed to comprise HARQ LLRs and soft decoding said HARQ LLRs to output a hard ACK/NACK decision. The method includes processing said HARQ LLRs based on said hard ACK/NACK decision such that the processed HARQ LLRs map to a same or identical constellation point or points if the physical channel uplink signal contains an ACK or NACK transmission signal. The method also includes using said processed HARQ LLRs to determine if the physical channel uplink signal contains an ACK or NACK transmission signal or to determine if the physical channel uplink signal comprises discontinuous transmission (DTX).

Abstract: Systems and methods which provide for detection of a signal using resource elements in the frequency domain where the signal for which detection is provided is multiplexed with other signals having subcarrier spacing that is different than the signal for which detection is provided are disclosed. Embodiments may provide for detection of a physical random access channel (PRACH) signal in a cellular radio communication system using resource elements in the frequency domain, wherein the PRACH signal is multiplexed with signals of other channels (e.g., data and/or control channel signals) of the cellular radio communication system. A frequency domain filter, such as implementing inverse discrete Fourier transform (IDFT) with down-sampling using indices for PRACH recovery, may be utilized to extract PRACH samples from frequency domain resource elements provided in a resource grid corresponding to a different subcarrier spacing than that of the PRACH.

Abstract: Provided is a method of determining timing of arrival of a signal on a path to a receiver in a mobile wireless communications system. The method comprises obtaining a channel impulse response (CIR) of a signal received at the receiver and deriving a power characteristic of the CIR. The method includes producing a first derivative of the power characteristic with respect to time, selecting some or all extrema from the first derivative of the power characteristic as indicative of candidate signal paths, and selecting one or more of said candidate signal paths. The method preferably includes determining timing of arrival of a signal on a first path of arrival at the receiver by assessing an energy value of each of said candidate signal paths against a threshold value.

Abstract: The present disclosure relates to methods, devices, and systems for cell identification. For example, the systems, devices, and methods described herein may be used to detecting a secondary synchronization signal (SSS) index. In an aspect of the present disclosure, a method includes detecting, at an electronic device, a first SSS index based on a comparison between a first power value and a first threshold. The first power value is associated with a correlation power result between a received signal from a base station and a local SSS. The method also include determining, at the electronic device, a second threshold based on the first power value, and performing a comparison between a second power value and the second threshold. The second power value is determined based on the received signal.

Abstract: Provided is a method of base station (BS) for channel state information (CSI) acquisition in a massive multiple input/multiple output (MIMO) communication system. The method comprises the steps at the BS of sending a set of beamformed reference signals (RSs) to a user equipment (UE) and receiving from said UE an indication of a subset of said set of beamformed RSs and CSI acquired by said UE for only said subset of said set of beamformed RSs. Also provided is a further method and a user equipment (UE) for CSI acquisition. The further method comprises the steps at the UE of receiving from the BS the set of beamformed RSs; estimating a channel of each RS comprising said set of beamformed RSs; selecting a subset of said set of beamformed RSs; acquiring CSI for only said selected subset of said set of beamformed RSs; and communicating to said BS an indication of said selected subset of said set of beamformed RSs and reporting the CSI acquired for said selected subset of said set of beamformed RSs.

Abstract: Methods and systems which provide for synchronization target selection by configuring a network device to reselect a synchronization signal transmission timeslot for synchronization target searching by the network device are described. Synchronization signal timeslot reselection may provide for downgrading a current stratum index to an artificial stratum index that does not accurately indicate a number of hops between the network device and a global synchronization source to allow for selection of available synchronization targets with stratum indices that are higher than or equal to the network device's stratum index without causing a synchronization loop. A synchronization signal pattern cycle structure having synchronization signal timeslots organized into multiple subcycles for accommodating synchronization signal timeslot reselection is utilized according to embodiments.

Abstract: Methods and systems which provide for synchronization target selection by configuring a network device to reselect a synchronization signal transmission timeslot for synchronization target searching by the network device are described. Synchronization signal timeslot reselection may provide for downgrading a current stratum index to an artificial stratum index that does not accurately indicate a number of hops between the network device and a global synchronization source to allow for selection of available synchronization targets with stratum indices that are higher than or equal to the network device's stratum index without causing a synchronization loop. A synchronization signal pattern cycle structure having synchronization signal timeslots organized into multiple subcycles for accommodating synchronization signal timeslot reselection is utilized according to embodiments.

Abstract: The present disclosure relates to methods and systems for selection of synchronization targets. Embodiments of the present disclosure provide for selecting a synchronization target for a network device, within operational network constraints, when the network device loses its current synchronization target. When a network device loses its current synchronization target, the stratum index of the network device is downgraded to an artificial stratum index before a selection of a new synchronization target is made. The artificial stratum index is broadcast to children network devices. Downgrading the stratum index to an artificial stratum index allows for selection of available synchronization target network devices with stratum indices higher than or equal to the network device's stratum index. After selection of a new synchronization target, the network device's stratum index is updated, and the new updated stratum index of the network device is broadcast to the children network devices of the network device.

Abstract: The present disclosure relates to methods and systems for selection of synchronization targets. Embodiments of the present disclosure provide for selecting a synchronization target for a network device, within operational network constraints, when the network device loses its current synchronization target. When a network device loses its current synchronization target, the stratum index of the network device is downgraded to an artificial stratum index before a selection of a new synchronization target is made. The artificial stratum index is broadcast to children network devices. Downgrading the stratum index to an artificial stratum index allows for selection of available synchronization target network devices with stratum indices higher than or equal to the network device's stratum index. After selection of a new synchronization target, the network device's stratum index is updated, and the new updated stratum index of the network device is broadcast to the children network devices of the network device.

Abstract: Provided is a method of determining timing of arrival of a signal on a path to a receiver in a mobile wireless communications system. The method comprises obtaining a channel impulse response (CIR) of a signal received at the receiver and deriving a power characteristic of the CIR. The method includes producing a first derivative of the power characteristic with respect to time, selecting some or all extrema from the first derivative of the power characteristic as indicative of candidate signal paths, and selecting one or more of said candidate signal paths. The method preferably includes determining timing of arrival of a signal on a first path of arrival at the receiver by assessing an energy value of each of said candidate signal paths against a threshold value.

Abstract: The presently claimed invention relates generally to a method and an apparatus for pilot decontamination for massive MIMO system and, more particularly, to a massive MIMO communication system based on channel estimation with topological interference alignment.

Abstract: Provided is a method of base station (BS) for channel state information (CSI) acquisition in a massive multiple input/multiple output (MIMO) communication system. The method comprises the steps at the BS of sending a set of beamformed reference signals (RSs) to a user equipment (UE) and receiving from said UE an indication of a subset of said set of beamformed RSs and CSI acquired by said UE for only said subset of said set of beamformed RSs. Also provided is a further method and a user equipment (UE) for CSI acquisition. The further method comprises the steps at the UE of receiving from the BS the set of beamformed RSs; estimating a channel of each RS comprising said set of beamformed RSs; selecting a subset of said set of beamformed RSs; acquiring CSI for only said selected subset of said set of beamformed RSs; and communicating to said BS an indication of said selected subset of said set of beamformed RSs and reporting the CSI acquired for said selected subset of said set of beamformed RSs.

Abstract: Systems and methods which provide white space channel identification and/or selection using high probability area determinations for a device and availability probability calculations for channels based on a probability model are described. A white space device (WSD) may utilize spectrum scanner sensing results to determine one or more course high probability area (HPA) for the WSD. The sensing results may further be analyzed to derive probability information regarding the WSD being located at the HPAs, to thereby refine the HPAs. Thereafter, the information regarding probabilities of the WSD being located at the HPAs may be utilized with information from a white space location database to determine an availability probability of one or more white space channels. One or more such white space channels may be identified and/or selected for use by the WSD.

Abstract: A method for transmitting payload data from a base station (BS) to a user equipment (UE) via a MIMO channel is provided. Channel estimation is performed first and the channel-estimation result is used for optimizing data transmission. Instead of reporting CQI, RI and PMI to the BS, the UE reports a first channel transfer function characterizing an end-to-end process of obtaining received CSI-RS symbols from originally-sent CSI-RS symbols. Computation burden at the UE is reduced as computation of the CQI, RI and PMI is eliminated. At the BS, an effect caused by the antenna port-to-transceiver unit (AP-to-TXRU) virtualization operation is removed from the first channel transfer function to yield a second channel transfer function. With the second channel transfer function closer to the MIMO channel transfer function than the first one, the “content” of the MIMO channel is better utilized in optimizing data-transmission performance.