Abstract: Methods and apparatuses for estimating channel state information in advanced multi input multi output (MIMO) antenna systems for cellular communications. A method of operating a base station (BS) includes: generating first configuration information including a set of sounding reference signal (SRS) resources each of which is associated with an sounding reference signal (SRS)-path loss reference signal; transmitting, to a user equipment (UE), the first configuration information; receiving an SRS based on the first configuration information; selecting, based on the SRS and the first configuration information, a subset of the set of SRS resources; and generating second configuration information including the subset of the set of SRS resources.

Abstract: Apparatuses and methods for composite beam paring in a wireless communication system. A method includes identifying, based on one or more user equipment (UE) reports, information on a plurality of narrow beams; determining beam correlation information for the plurality of narrow beams based on the one or more UE reports; and determining pairs of narrow beams from among the plurality of narrow beams based on the correlation information.

Abstract: A method includes identifying child beams of a current composite beam. The method also includes determining an order at which the child beams of the current composite beam are measured based on a likelihood that each child beam of the current composite beam is an optimal beam, among the child beams, to be a serving narrow beam. The method also includes determining a threshold for use in deciding whether to measure one or more additional child beams or select an already measured child beam when selecting the optimal beam. The method also includes selecting the optimal beam, among the child beams, to be the serving narrow beam based on the determined order and the determined threshold.

Abstract: A method, an electronic device with a memory configured to store a hierarchical codebook with a processor operably connected to the memory to perform the method, and a non-transitory computer-readable medium storing instructions that when executed by a processor of an electronic device cause the electronic device to perform the method. The method identifies input data including at least one of an array size, an antenna element spacing, a phase-shifter resolution, a specified coverage region, or an antenna element pattern. The input data is processed by putting an initial beam through a non-decreasing concave utility function which uses a cyclic coordinate descent algorithm that generates a wide beam meeting one or more design specifications. A codebook is produced that includes the wide beam.

Abstract: Methods and apparatuses for uplink (UL) coverage enhancements with joint phase-time arrays (JTPAs). A method for operating a base station (BS) includes identifying criteria associated with a set of user equipments (UEs) in a cell of the BS and determining, based on the criteria, a first subset of the set of UEs to use a JPTA beamforming. The method further includes using the JPTA beamforming for signaling with the first subset of UEs and using an analog beamforming for signaling with a second subset of UEs in the set of UEs.

Abstract: Methods and apparatuses for mobility robustness with joint phase-time arrays (JTPAs). A method for operating a base station (BS), includes determining, based on a wide-beam (WB) alignment procedure, a subset of beams for transmission of physical downlink shared control channels (PDSCHs). The method further includes transmitting a physical downlink control channel (PDCCH) indicating the subset of beams and transmitting the PDSCHs on the subset of beams, respectively, using a JPTA beamforming. The same data is included in each of the PDSCHs.

Abstract: A method includes determining one or more delay values and one or more phase shift values for generation of multiple desired frequency-dependent analog beams. The method also includes configuring one or more true-time delay (TTD) elements and one or more phase shifters of a transceiver based on the one or more delay values and the one or more phase shift values, the transceiver having one or more radio-frequency (RF) chains connected to multiple antennas via the one or more TTD elements and the one or more phase shifters. The method also includes operating the transceiver to generate the multiple desired frequency-dependent analog beams.

Abstract: A method for operating an electronic device comprises obtaining information about signal quality measurements associated with a channel; generating newly obtained signal quality measurements based on a beam-sweeping procedure, wherein each signal quality measurement is associated with a respective measurement time and a respective transmit beam; adjusting the newly obtained signal quality measurements based on the measurement times and positional information of the electronic device; and updating a first measurement database of signal quality measurements with the adjusted signal quality measurements.

Abstract: Methods, apparatuses, systems, and computer-readable media for a composite beam generation using machine learning. A method includes identifying a narrow beam for a transmission, identifying a composite beam including the narrow beam based on an association between one or more composite beams and one or more narrow beams, identifying one or more beamforming weights for transmitting the composite beam, and transmitting the composite beam using the one or more beamforming weights. The one or more beamforming weights are determined based on machine learning. In some embodiments, the method includes generating a composite beam codebook including information indicating sets of one or more beamforming weights corresponding to composite beam indexes, respectively. The sets of one or more beamforming weights are determined using respective parameters of a machine learning algorithm that are separately updated for coverage regions of composite beams corresponding to the composite beam indexes, respectively.

Abstract: A method, an electronic device with a memory configured to store a hierarchical codebook with a processor operably connected to the memory to perform the method, and a non-transitory computer-readable medium storing instructions that when executed by a processor of an electronic device cause the electronic device to perform the method. The method identifies input data including at least one of an array size, an antenna element spacing, a phase-shifter resolution, a specified coverage region, or an antenna element pattern. The input data is processed by putting an initial beam through a non-decreasing concave utility function which uses a cyclic coordinate descent algorithm that generates a wide beam meeting one or more design specifications. A codebook is produced that includes the wide beam.

Abstract: Apparatuses and methods for composite beam paring in a wireless communication system. A method includes identifying, based on one or more user equipment (UE) reports, information on a plurality of narrow beams; determining beam correlation information for the plurality of narrow beams based on the one or more UE reports; and determining pairs of narrow beams from among the plurality of narrow beams based on the correlation information.