Abstract: A communication device may be used in a communication system. The communication device includes a set of antenna elements arranged in an antenna aperture. The communication device determines a transformation matrix T based on a coupling matrix C, which includes coupling coefficients between each antenna element in the set of antenna elements. By multiplying the transformation matrix T with a first beamforming matrix f1 a second beamforming matrix f2 is obtained. Based on the second beamforming matrix f2 the communication device transmits a communication signal x via the set of antenna elements in a wireless channel.

Abstract: Devices, methods and computer readable medium for two-part feedback information transmission in wireless communications are provided. The two-part feedback information transmission is adopted, e.g., for improved downlink multiple-input and multiple-output (MIMO) precoding in time-division duplex (TDD)-based communication systems. The feedback information transmission allows compensating for adverse effects of incomplete UL-DL reciprocity for DL MIMO precoding caused by mismatched DL and UL channel measurements. The feedback information transmission being two-part allows low overhead for the feedback information.

Abstract: First and second communication devices shape symbol constellation in wireless transmissions. The first communication device obtains a second symbol constellation based on the first symbol constellation and the set of weights, where the first symbol constellation is based on a radiating pattern in a set of radiating patterns for the first communication device and the weights are derived based on the first symbol constellation. Thereafter, the set of antenna elements are controlled according to the radiating pattern for transmitting a set of information bits mapped onto the second symbol constellation. Thereby, the second symbol constellation is customized to the radio environment to enable smart radio that enjoys improved signal design and thereby better performance.

Abstract: Example wireless communications methods and apparatus with two-way beam failure recovery are disclosed. One example method includes receiving a downlink beam failure recovery request by a network device from a client device indicating at least one new downlink candidate beam determined to replace at least one failed downlink beam. The network device detects at least one failed uplink beam, determines at least one new uplink candidate beam to replace the detected at least one failed uplink beam, and generates uplink redirection information indicating the determined at least one new uplink candidate beam. A response including the generated uplink redirection information is generated by the network device, and transmitted to the client device.

Abstract: A client device and a network access node engaged in downlink measurement information signaling and transmission in a communication system. The client device transmits a set of uplink reference signals and a feedback signal to the network access node. The feedback signal indicates measurement information about the downlink between the client device and a network access node. Based on the set of uplink reference signals and the feedback signal, the network access node determines a precoder and performs a downlink transmission of data/pilots to the client device using the precoder.

Abstract: First and second communication devices shape symbol constellation in wireless transmissions. The first communication device obtains a second symbol constellation based on the first symbol constellation and the set of weights, where the first symbol constellation is based on a radiating pattern in a set of radiating patterns for the first communication device and the weights are derived based on the first symbol constellation. Thereafter, the set of antenna elements are controlled according to the radiating pattern for transmitting a set of information bits mapped onto the second symbol constellation. Thereby, the second symbol constellation is customized to the radio environment to enable smart radio that enjoys improved signal design and thereby better performance.

Abstract: Devices, methods and computer programs for wireless communications with rotational beam management are disclosed. Information from past beam tracking stages can be used for a next beam tracking stage, since a next beam codebook to be used for beam scanning depends on an earlier beam codebook.

Abstract: An apparatus and method for allocating time-frequency resource, comprising: allocating a first group-specific data time-frequency resource to data sequences associated to UEs comprised in a first UE group of the plurality of UE groups; and allocating a second group-specific data time-frequency data resource to data sequences associated to UEs comprised in a second UE group of the plurality of UE groups; wherein the first and the second group-specific data time-frequency resources at least partly overlap in time domain.

Abstract: A network node device includes a radio transceiver configured to receive a data sequence from a plurality of user equipments (UEs) over first and second sets of resource elements, wherein the first set of resource elements is mapped non-orthogonally and the second set is mapped orthogonally. The network node device further comprises a processor configured to determine channel vectors based at least in part on the data sequence received over the first set of resource elements or over the second set of resource elements, and to utilize the data sequence as received over the second set of resource elements to associate the determined channel vectors with each of the plurality of UEs.

Abstract: Example wireless communications methods and apparatus with two-way beam failure recovery are disclosed. One example method includes receiving a downlink beam failure recovery request by a network device from a client device indicating at least one new downlink candidate beam determined to replace at least one failed downlink beam. The network device detects at least one failed uplink beam, determines at least one new uplink candidate beam to replace the detected at least one failed uplink beam, and generates uplink redirection information indicating the determined at least one new uplink candidate beam. A response including the generated uplink redirection information is generated by the network device, and transmitted to the client device.

Abstract: A network node includes an antenna array having a plurality of antenna sub-arrays. A switching device is coupled to the antenna array, the switching device being configured to connect at least two input signals to respective ones of the plurality of antenna sub-arrays. A processor is configured to determine a channel capacity, wherein based on the channel capacity, the processor is configured to control the switching device to switch a connection of the at least two input signals to different ones of the plurality of antenna sub-arrays to change one or more of an inter-distance between the respective ones of the plurality of antenna sub-arrays and a down-tilting angle of the antenna array.

Abstract: A method and a control unit are provided. The control unit is configured to receive a latency related measurement value; determine an antenna configuration parameter for a transceiver, wherein either select a switching based adjustment based on a configuration mode, when the received latency related measurement value exceeds a threshold level, or when the received latency related measurement value is below the threshold level, select the antenna configuration parameter for a motorised electromechanical adjustment.

Abstract: An apparatus and method for allocating time-frequency resource, comprising: allocating a first group-specific data time-frequency resource to data sequences associated to UEs comprised in a first UE group of the plurality of UE groups; and allocating a second group-specific data time-frequency data resource to data sequences associated to UEs comprised in a second UE group of the plurality of UE groups; wherein the first and the second group-specific data time-frequency resources at least partly overlap in time domain.

Abstract: The disclosure relates to a first communication device for a wireless communication system, the first communication device comprising: a processor, a cascade precoder including an outer precoder and an inner precoder, and a transceiver; wherein the processor is configured to determine the inner precoder; wherein the transceiver is configured to transmit a first pilot sequence to a second communication device; wherein the transceiver is configured to receive a first channel estimation from the second communication device; wherein the processor is configured to determine the outer precoder based on the first channel estimation; wherein the transceiver is configured to transmit at least one of a data sequence and a pilot sequence to the second communication device.

Abstract: An apparatus and method for allocating time-frequency resource, comprising: allocating a first group-specific data time-frequency resource to data sequences associated to UEs comprised in a first UE group of the plurality of UE groups; and allocating a second group-specific data time-frequency data resource to data sequences associated to UEs comprised in a second UE group of the plurality of UE groups; wherein the first and the second group-specific data time-frequency resources at least partly overlap in time domain.

Abstract: Devices, methods and computer programs for wireless communications with rotational beam management are disclosed. Information from past beam tracking stages can be used for a next beam tracking stage, since a next beam codebook to be used for beam scanning depends on an earlier beam codebook.

Abstract: A method and a control unit are provided. The control unit is configured to receive a latency related measurement value; determine an antenna configuration parameter for a transceiver, wherein either select a switching based adjustment based on a configuration mode, when the received latency related measurement value exceeds a threshold level, or when the received latency related measurement value is below the threshold level, select the antenna configuration parameter for a motorised electromechanical adjustment.

Abstract: According to a first aspect a network node device is provided, comprising: a radio transceiver configured to receive a data sequence from a plurality of user equipment over first and second sets of resource elements, wherein the first set is mapped non-orthogonally and the second set is mapped orthogonally. The network node device further comprises a processor configured to determine channel vectors based on at least the data sequence received over the first set of resource elements or the second set of resource elements, and to utilize the data sequence received over the second set of resource elements to associate the determined channel vectors with each of the plurality of user equipment.

Abstract: Network node and method in a network node, comprising: grouping a plurality of UEs into at least a first UE group and a second UE group; assigning a mutually orthogonal pilot sequence to each UE comprised in the first UE group; assigning a mutually orthogonal pilot sequence to each UE comprised in the second UE group; assigning a resource-offset to the UEs comprised in each UE group, by which each UE is allowed to start its transmission sub-frame in its Transmission Time Interval, TTI; and transmitting the assigned pilot sequences and the assigned resource-offset to UEs.

Abstract: A network node includes an antenna array having a plurality of antenna sub-arrays. A switching device is coupled to the antenna array, the switching device being configured to connect at least two input signals to respective ones of the plurality of antenna sub-arrays. A processor is configured to determine a channel capacity, wherein based on the channel capacity, the processor is configured to control the switching device to switch a connection of the at least two input signals to different ones of the plurality of antenna sub-arrays to change one or more of an inter-distance between the respective ones of the plurality of antenna sub-arrays and a down-tilting angle of the antenna array.