Abstract: In an embodiment, a WTRU is configured to apply, to data symbols, a transform-spreading function that spreads the data symbols in a frequency domain, to form a first beam, and to transmit the transform-spread data symbols in the first beam. For example, an embodiment for improving reliability of signal detection over an impaired link includes implementing a Generalized Space-Frequency Block Coding (GSFBC) procedure. The impairment can be caused, e.g., by aging of the channel-state information, imperfections in the channel-state acquisition or reporting procedures, and/or beam-squint effects in multi-antenna systems. And an embodiment can include using hybrid beamforming and a GSFBC procedure to improve reliability of detection of the signal in the presence of beam squint and/or beam misalignments.

Abstract: A wireless transmit/receive unit (WTRU) is configured to report to a network the WTRU capability for physical downlink control channel (PDCCH) decoding including supported number of discrete fourier transform (DFT) modules and sizes and receive from the network a PDCCH configuration as a search space and control resource set (CORESET) configurations having a spreading factor or an orthogonal code length, a number of frequency resource groups (FRGs) and associated sizes, an indication of code domain multiplexing, and a CORESET format. The WTRU determines resource groups (RG) size and a number of RGs per control channel elements (CCE) based on configured spreading factor and FRG size, and determines an association between RGs and orthogonal cover codes (OCCs) per FRG and orthogonal frequency division multiplexing (OFDM) symbol based on, among other things, the configured spreading factor.

Abstract: Methods and systems are provided for a wireless transmit/receive unit (WTRU). A WTRU sends a capabilities message to a wireless network, receives configuration information for a localization or sensing task, wherein the configuration information comprises a reference signal (RS) reporting trigger, performs a first localization or sensing measurement of a first received RS based on the configuration information, determines whether the RS reporting trigger is satisfied based on the first measurement, reports, based on the RS reporting trigger being satisfied, one or more preferred characteristics of a second RS based on the first localization or sensing measurement to the network, receives an indication to perform a second localization or sensing measurement of a second received RS and performs a second localization or sensing measurement of the second received RS, reports the second localization or sensing measurement and an uncertainty value associated with the second localization or sensing measurement.

Abstract: Described herein are systems, methods, and instrumentalities associated with wireless communications using single carrier waveforms. A wireless transmit/receive unit (WTRU) as described herein may receive configuration information that may indicate a control channel element (CCE) and a plurality of resource groups associated with the CCE. Each resource group may include a respective time resource element (TRE) and a respective frequency resource group (FRG), wherein each respective TRE may include a non-integer number of time units, and each respective FRG may include multiple frequency units. The WTRU may determine that the CCE may be associated with a downlink control channel transmission, and further determine allocation pattern information associated with the resource groups in a search space.

Abstract: Procedures, methods, architectures, apparatuses, systems, devices, and computer program products are provided for object detection over a wireless network. A method performed by a wireless transmit/receive unit (WTRU) includes receiving, from a wireless network, a configuration that includes a configured target profile for a target and information indicative of an identification of the target, wherein the configured target profile comprises a radar cross section profile associated with the target; receiving at least one signal from the wireless network; generating a measured profile based on the at least one signal; determining that the at least one signal was reflected by the target based at least in part on the information indicative of the identification of the target and a comparison between the configured target profile and the measured profile; and performing sensing measurements associated with the target using the at least one signal based at least in part on the determination.

Abstract: Methods for data-driven multiple input-multiple output (MIMO) precoder compression are described herein. A method may include receiving one or more channel state information (CSI) reference signals (RSs) using a plurality of subbands. The method includes transmitting a report indicating coherence time information associated respectively with the plurality of subbands, wherein the coherence time information associated respectively with the plurality of subbands is determined based on CSI determined from the received CSI-RSs. The method includes receiving at least one second CSI-RS using the at least one of the plurality of subbands. The method includes transmitting feedback to the transmitter including compressed information indicating, for the at least one of the plurality of subbands, suggested precoding parameters determined based on the received at least one second CSI-RS, wherein the feedback is transmitted within a coherence time associated with the at least one of the plurality of subbands.

Abstract: Systems and methods are provided for providing sensing features. A WTRU receives first configuration information indicative of a CSI-RS sub-band configuration, at least one first criterion and at least one second criterion. The WTRU performs channel state estimation measurements on a plurality of CSI-RS resources, identifies a set of sub-band options from the CSI-RS resources that satisfy the at least one first criterion based at least in part on the channel state estimation measurements and on the CSI-RS sub-band configuration, identifies a subset of the identified set of sub-band options that satisfy the at least one second criterion, and transmits, to the wireless network, a sub-band request. The WTRU receives, from the wireless network based on the sub-band request, second configuration information indicative of which of the plurality of CSI-RS resources are to be used for sensing measurements and performs the sensing measurements based on the second configuration information.

Abstract: A method performed by a base station (BS) within a radio access network (RAN), the method comprising: receiving uplink (UL) reference signals (RSS) sent from each of a plurality of transmission/reception points (TRPs), a respective UL RSs received at each of a plurality of TRPs from each of a plurality of panels, determining a channel measuring indicator (CQI) for each of the received UL RSs, selecting a respective panel from the plurality of panels for each of the plurality of TRPs based on the determined CQI for each of the received UL RSs, and transmitting a codeword and the determined respective panel for each of the plurality of TRPs, the codeword for each of the plurality of the TRPs having a priority based on the determined CQI for each of the received UL RSs.

Abstract: Procedures, methods, architectures, apparatuses, systems, devices, and computer program products for reporting precoding information to a transmit/receive point (TRP) includes a wireless transmit/receive unit (WTRU) transmitting sensing capability information to the TRP, receiving, from the TRP, configuration information including reporting conditions based on the sensing capability information, and receiving a reference signal from the TRP. The methods further include the WTRU determining a first set of scatterers that meet first reporting conditions and generating first precoding information for each of the first set of scatterers based on at least one CIR of the received RS, and determining a second set of scatterers that meet second reporting conditions and generating a second precoding information for each scatterer of the second set of scatterers and each scatterer of the first set. The WTRU then generates a report including each of the precoding information, and transmits the report to the TRP.

Abstract: Some implementations provide devices, methods and systems for receiving data over a Discrete Fourier Transform-spread Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) waveform. A Reference Signal (RS) configuration message is received. A padding sequence structure is determined based on a received indication. A DFT-s-OFDM symbol is received. Interference is cancelled based on the padding sequence structure. In some implementations, the padding sequence structure includes a constant-envelope sequence, sign-reversed data symbols, phase-shifted data symbols, and/or blank symbols. In some implementations, the RS configuration message includes an RS sequence, a RS length, and/or a subcarrier offset.

Abstract: Disclosed herein are a plurality of embodiments addressing wireless communications, where one or more of the embodiments specifically address phase noise (PN) compensation techniques in which multiple groups of reference symbols are transmitted by computed splitting of the allocated Physical Resource Block(s) (PRBs) in suitable groups of sizes (e.g., equal or lower than the channel's coherence bandwidth), and ensuring the frequency domain circular symmetric transmission from the transmitting entity side adding the cyclic sub-carriers to each group. There may be one or more designs of techniques to choose suitable numbers and sizes of groups to enable suitable level of PN compensation at a receiving entity and provide various methods to ensure circular symmetry within each group. One or more approaches may be able to adapt to the instantaneous channel conditions and PN characteristics of the transceivers on a per-user basis.

Abstract: A method and system for optimizing the performance of spatial multiplexing techniques in MU-MIMO wireless systems comprising subsectors where the presence of significant correlation between antenna elements can impair the performance of MU-MIMO techniques. The proposed solution ensures optimum selection of a specific combination of transmit antenna elements and receive antenna elements that maximizes MU-MIMO performance.

Abstract: A method and system for optimizing the performance of spatial multiplexing techniques in MU-MIMO wireless systems comprising subsectors where the presence of significant correlation between antenna elements can impair the performance of MU-MIMO techniques.

Abstract: A method and device for optimal coexistence of a first cellular Time-Division Duplex, TDD, system and a second TDD system operating in the same frequency band. The proposed solution is capable of minimizing interferences without modifying the (RF and SW) characteristics of the second system, while at the same time achieving flexibility in UL:DL traffic ratio.

Abstract: Method and system to dynamically associate spatial layers to beams in a FWA network operating in the millimeter-wave frequency range. A base station and a CPE are willing to wirelessly transmit and receive data through a wireless channel of the FWA network, the base station having beamforming capabilities henceforth generating multiple wireless beams. The base station performs all baseband wireless functions related for creating, keeping and managing the connections between the base station and the CPE at baseband level, wherein information is handled in the form of up to M spatial layer signals, and with no built-in capabilities for creation, detection or management of the beams. The base station also performs all necessary RF functions at millimeter-wave frequencies, including beamforming and conversion from complex baseband signals to RF signals and vice versa, and also couples the RF signals to the wireless channel.

Abstract: A method and transmitter for generating broadcast beam patterns in massive MIMO systems, the transmitter comprising a rectangular antenna array with a number N1 of antenna elements in the horizontal direction and a number N2 of antenna elements in the vertical direction. The MIMO transmitter generates broadcast beam patterns with determined beam widths in horizontal and vertical dimensions to cover a sector area of a cell by the rectangular antenna array radiating N1×N2 radiofrequency signals at a carrier frequency, the sector area being where a user equipment requests from the MIMO transmitter access to the cell. The beam widths in horizontal and vertical directions are determined by using an optimum set of complex excitation coefficients calculated from a discretized continuous-space array factor ?(?,?), which is based on a discretization over the elevation angle ? and the azimuth angle ? of the antenna elements.

Abstract: A method and transmitter for generating broadcast beam patterns in massive MIMO systems, the transmitter comprising a rectangular antenna array with a number N1 of antenna elements in the horizontal direction and a number N2 of antenna elements in the vertical direction. The MIMO transmitter generates broadcast beam patterns with determined beam widths in horizontal and vertical dimensions to cover a sector area of a cell by the rectangular antenna array radiating N1×N2 radiofrequency signals at a carrier frequency, the sector area being where a user equipment requests from the MIMO transmitter access to the cell. The beam widths in horizontal and vertical directions are determined by using an optimum set of complex excitation coefficients calculated from a discretized continuous-space array factor ?(?, ?), which is based on a discretization over the elevation angle ? and the azimuth angle ? of the antenna elements.

Abstract: A method to provide robustness against noise and interference in wireless communications, a transmitter and computer program products, involving sending to a receiver (13), through a wireless channel (12), information using a constant-envelope waveform with complex baseband representation of the form s[n]=Ac exp{j?[n]}.

Abstract: Method and system to dynamically associate spatial layers to beams in a FWA network operating in the millimeter-wave frequency range. A base station (101) and a CPE (102) are willing to wirelessly transmit and receive data through a wireless channel of said FWA network, said base station (101) having beamforming capabilities henceforth generating multiple wireless beams (103). The base station (101) performs all baseband wireless functions related for creating, keeping and managing the connections between the base station (101) and the CPE (102) at baseband level, wherein information is handled in the form of up to M spatial layer signals, and with no built-in capabilities for creation, detection or management of the beams (103). The base station (101) also performs all necessary RF functions at millimeter-wave frequencies, including beamforming and conversion from complex baseband signals to RF signals and vice versa, and also couples the RF signals to said wireless channel.

Abstract: A system, method and device to overcome the effects of mobility in OFDM wireless cellular networks. Individual beams are isolated and Doppler impairments are compensated so the constituent beams can reach the users in DL with ideally no Doppler impairments. Similarly in UL the signals corresponding to the different spatial beams are detected and their Doppler impairments compensated.