Abstract: A method performed by a user equipment that receives a configuration from a network node via a higher layer is described. The received configuration may include at least two sounding reference signal (SRS) resource sets, and each SRS resource set may include at least one SRS resource. The higher layer configuration of the SRS may include a parameter usage where the parameter is set to nonCodebook. The method may include receiving a scheduling of a physical uplink shared channel (PUSCH) transmission via a downlink control information (DCI) with SRS resources that are associated with different SRS resource sets and are indicated via a sounding reference signal resource indicator (SRI) field of the DCI. The method may include mapping a given SRI bit field to the SRS resources indicated from associated SRS resource sets and transmitting a PUSCH using antenna ports associated with the indicated SRS resources.

Abstract: The embodiments herein relate to a method performed by a UE (900) for providing a channel state information (CSI) feedback in a wireless communication system including at least the UE and a gNB (800) or a radio network node. The UE (900) is operative, by means of e.g. the processor (910) to: estimate the MIMO channel between the gl?JB (800) and the UE (910) based on received DL reference signals for the configured resource blocks. The UE (900) is further operative to calculate, based on a performance metric. a precoder matrix, for a number of antenna ports of the gNB (800) and configured subbands, the precoder matrix being based on two codebooks and a set of combination coefficients for complex scaling/combining one or more of vectors selected from a first codebook and a second codebook, and the UE (900) is operative to report a CSI feedback and/or a PMI and/or a PMI/RI, to the gNB (800), used to indicate the precoder matrix for the configured antemia ports and resource blocks.

Abstract: A communication device providing CSI feedback in a wireless communication system includes a transceiver to receive downlink reference signals and downlink signals including a reference signal configuration. A processor estimates an explicit CSI in the frequency domain. The processor selects a Doppler-delay-beam precoder matrix for a composite Doppler-delay-beam three-stage precoder, which is based on one or more codebooks including one or more transmit-side spatial beam components, one or more delay components, and one or more Doppler-frequency components, The processor calculates a CQI and/or a PMI and/or a rank indicator, RI, using the explicit CSI and the composite Doppler-delay-beam three-stage precoder, and reports the CSI feedback including the CQI, and/or the PMI and/or the RI. The one or more delay and/or Doppler-frequency components are defined by one or more sub-matrices of a DFT matrix or an oversampled DFT matrix.

Abstract: The embodiments of the present disclosure relate to methods and apparatuses for the generation and transmission/reception of a CSI report or CSI feedback report. The method performed by a UE includes: receiving from a network node a CSI report configuration indicating a number of antenna port groups or CSI-RS port groups; determining based on the CSI report configuration a precoder matrix for a number of antenna or CSI-RS port groups; generating, a CSI feedback report comprising a Precoder Matrix Indicator indicating the precoder matrix for the number of antenna or CSI-RS port groups; and reporting, to the network node, the CSI report or the CSI feedback report. The embodiments also relate to a method performed by a network node, a UE and a network node.

Abstract: A communication device for providing a channel state information, CSI, feedback in a wireless communication system includes a transceiver to receive, from a transmitter a radio signal via a time-variant, frequency-selective MIMO channel, the radio signal including downlink reference signals according to a reference signal configuration including a number of antenna ports, and downlink signals including the reference signal configuration; and a processor. The processor estimates an explicit CSI in the frequency domain using measurements on the downlink reference signals on the radio channel, selects a Doppler-delay precoder matrix (W) for a composite Doppler-delay-beam three-stage precoder, calculates either one or more of a channel quality indicator, CQI, and/or a precoder matrix indicator, PMI, and/or a rank indicator, RI, and reports to the transmitter the CSI feedback including either one or more of the CQI, and/or the PMI and/or the RI.

Abstract: The embodiments relate to methods and apparatuses for enabling transmission of at least one PUSCH. A method comprises: configuring a UE to receive a single PDCCH or a higher layer grant that schedules at least one PUSCH transmission occasion. If one PUSCH transmission occasion is scheduled: scheduling the UE to transmit at least two segments of the PUSCH, each segment is associated with a transmission setting comprising a set of transmission parameters, at least one transmission parameter associated with one of the segments is different from the corresponding transmission parameter associated with at least one other segment. If more than one PUSCH transmission occasion is scheduled, each PUSCH transmission occasion is associated with a transmission setting, wherein at least one transmission parameter associated with one of the PUSCH transmission occasions is different from the corresponding transmission parameter associated with one other PUSCH transmission occasion.

Abstract: A user device UE for a wireless communication with a plurality of wireless network elements includes a plurality of antennas. The plurality of antennas are configured to form a plurality of spatial or directional beams. The user device is configured to provide simultaneously a plurality of independent wireless communication links using the plurality of spatial or directional beams, wherein the user device is configured to provide a first wireless communication link with a first wireless network element using a first spatial or directional beam and to provide a second wireless communication link with a second wireless network element using a second antenna beam.

Abstract: A user equipment, UE, for communicating with a base station, BS, in a wireless communication system is described. The UE comprises one or more antenna arrays, each antenna array having a plurality of antenna elements. The UE signals to a BS, dependent on a property of the one or more antenna arrays, whether the UE supports full beam correspondence, partial beam correspondence or no beam correspondence.

Abstract: The embodiments herein relate to method performed by a radio network node, a network node, a method performed by a UE and a UE for reducing feedback overhead. The method performed by the UE comprises at least: decomposing each entry corresponding to a (i, j)-th combining coefficient of a precoder matrix into at least two coefficients; quantizing, separately, each of said at least two coefficients with a least one bit, and reporting information related to at least one phase value or at least one amplitude value or at least one phase value and an amplitude value of said quantized coefficient.

Abstract: A method for evaluating an apparatus having at least one antenna array, the apparatus configured for forming a plurality of communication beam patterns using the antenna array, includes positioning of the apparatus in a measurement environment or moving/switching the probe/link antenna(s) of the measurement environment around the apparatus adapted to measure beam patterns and controlling the apparatus so as to form a predefined beam pattern of the plurality of communication beam patterns. The method includes measuring the predefined beam pattern using the measurement environment and/or the apparatus.

Abstract: A receiver processes a radio signal received via a radio channel from a transmitter employing a plurality of antenna ports, determines complex precoder coefficients and delays of one or more space-delay precoders for one or more transmission layers and antenna ports at the transmitter so as to achieve a predefined property for a communication over the radio channel, and feeds back, explicitly or implicitly, delays and the complex precoder. The space-delay precoder has a dual-stage structure having a spatial codebook matrix including spatial beamforming vectors, a frequency-domain codebook matrix, and a combining element per layer for complex scaling or combining one or more of the vectors selected from the spatial and/or frequency-domain codebook matrices. The frequency-domain codebook matrix is defined by a sub-matrix of a DFT matrix, which the sub-matrix of the DFT matrix is associated with a range of delay values.

Abstract: The embodiments herein relate to a method performed by a network node and a network node. The method comprises setting a higher-layer parameter usage in at least one sounding reference signal, SRS, resource set configuration to nonCodebook or Codebook, wherein each configured SRS resource set comprises one or more SRS resources, and scheduling a physical uplink shared channel (PUSCH) transmission via a downlink control information (DCI) wherein at least two SRS resources are indicated via a sounding reference signal resource indicator (SRI) field of the DCI, wherein each SRS resource is associated with a different SRS resource set; and receiving from the user equipment a physical uplink shared channel that is transmitted using the ports associated with the indicated SRS resources.

Abstract: A communication device for providing a channel state information, CSI, feedback in a wireless communication system includes a transceiver to receive, from a transmitter a radio signal via a time-variant, frequency-selective MIMO channel, the radio signal including downlink reference signals according to a reference signal configuration including a number of antenna ports, and downlink signals including the reference signal configuration; and a processor. The processor estimates an explicit CSI in the frequency domain using measurements on the downlink reference signals on the radio channel, selects a Doppler-delay precoder matrix (W) for a composite Doppler-delay-beam three-stage precoder, calculates either one or more of a channel quality indicator, CQI, and/or a precoder matrix indicator, PMI, and/or a rank indicator, RI, and reports to the transmitter the CSI feedback including either one or more of the CQI, and/or the PMI and/or the RI.

Abstract: A method performed by a UE for providing CSI feedback in the form of CSI reports in a wireless communication system includes receiving, from a gNB, higher layer configurations of one or more downlink reference signals, and CSI report configurations associated with the downlink reference signal configurations, and a radio signal including the downlink reference signals according to the one or more downlink reference signal configurations, the downlink reference signals provided over a configured number of frequency domain resources, time domain resources and one or more ports; determining, for each CSI report, a precoding matrix based on the downlink reference signals and two codebooks, and one or more non-zero combining coefficients for complex combining of one or more spatial domain and delay domain basis vectors; and reporting to the network node the CSI reports for the CSI report configurations.

Abstract: A method performed by a UE for providing CSI feedback in the form of CSI reports in a wireless communication system includes receiving, from a gNB, higher layer configurations of one or more downlink reference signals, and CSI report configurations associated with the downlink reference signal configurations, and a radio signal including the downlink reference signals according to the one or more downlink reference signal configurations, the downlink reference signals provided over a configured number of frequency domain resources, time domain resources and one or more ports; determining, for each CSI report, a precoding matrix based on the downlink reference signals and two codebooks, and one or more non-zero combining coefficients for complex combining of one or more spatial domain and delay domain basis vectors; and reporting to the network node the CSI reports for the CSI report configurations.

Abstract: The invention relates to a method performed by a combination of a radio network node, a network node, and a user equipment (device) for reducing s feedback overhead. The method performed by the user equipment (device) decomposes each entry corresponding to a (i,j)-th combining coefficient of a precoder matrix into at least two coefficients then quantizing, each of the at least two coefficients and reporting information related to at least one phase value or at least one amplitude value of the quantized coefficients.

Abstract: Method performed by a UE for providing a channel state information (CSI) feedback in a wireless communication system including at least the UE and a gNB or a radio network node. The UE is operative to: estimate the MIMO channel between the gNB and the UE based on received DL reference signals for the configured resource blocks. The UE is further operative to calculate, based on a performance metric, a precoder matrix, for a number of antenna ports of the gNB and configured subbands, the precoder matrix being based on two codebooks and a set of combination coefficients for complex scaling/combining one or more of vectors selected from a first codebook and a second codebook, and the UE is operative to report a CSI feedback and/or a PMI and/or a PMI/RI, to the gNB, used to indicate the precoder matrix for the configured antenna ports and resource blocks.

Abstract: Methods and apparatuses for the generation and transmission/reception of a CSI report. A method performed by a UE includes: receiving a CSI report configuration from a network node; determining a number of precoder coefficients for RI transmission layers of a precoder vector or matrix; grouping the precoder coefficients of the RI transmission layers into at least two coefficient subsets, assigning a certain ordering to said at least two coefficient subsets and to the precoder coefficients within each coefficient subset; dividing said at least two coefficient subsets into two or more CSI groups having associated priority levels; generating a CSI report comprising a CSI part 1 and a CSI part 2; and transmitting a UCI including the CSI report over a UL channel to the network node.

Abstract: A communication device for providing an explicit channel state information, CSI, feedback in a wireless communication system includes a transceiver to receive, from a transmitter a radio signal via a radio time-variant frequency MIMO channel, the radio signal including downlink reference signals according to a reference signal configuration, and downlink signals including the reference signal configuration, and a processor. The processor estimates the CSI using measurements on the downlink reference signals of the radio channel according to the reference signal configuration over one or more time instants/slots, constructs a frequency-domain channel tensor using the CSI estimate, performs a higher-order principal component analysis, HO-PCA, on the channel tensor, identifies a plurality of dominant principal components of the channel tensor, thereby obtaining a compressed channel tensor, and reports to the transmitter the explicit CSI including the dominant principal components of the channel tensor.

Abstract: A receiver processes a radio signal received via a radio channel from a transmitter employing a plurality of antenna ports, determines complex precoder coefficients and delays of one or more space-delay precoders for one or more transmission layers and antenna ports at the transmitter so as to achieve a predefined property for a communication over the radio channel, and feeds back, explicitly or implicitly, delays and the complex precoder. The space-delay precoder has a dual-stage structure having a spatial codebook matrix including spatial beamforming vectors, a frequency-domain codebook matrix, and a combining element per layer for complex scaling or combining one or more of the vectors selected from the spatial and/or frequency-domain codebook matrices. The frequency-domain codebook matrix is defined by a sub-matrix of a DFT matrix, which the sub-matrix of the DFT matrix is associated with a range of delay values.