Abstract: A method performed by a receiver for hardware impairment compensation. The method includes receiving a transmitted signal transmitted by a transmitter. The method also includes determining hardware state information (HSI) based on the received signal. The method further includes providing to the transmitter information indicating the HSI, wherein the HSI comprises information that enables the transmitter to compensate for distortion caused by one or more hardware components of the transmitter and/or one or more hardware components of the receiver.

Abstract: A link adaptation method is disclosed for a transmitter node configured for spatial multiplexing of signals into streams and for transmission of spatially multiplexed streams over a forward channel, wherein each stream is intended for a receiver node. The method comprises selecting a transmission pre-coding setting for at least one of the spatially multiplexed streams based on an acquired channel estimate of the forward channel, estimating a forward channel disturbance component, wherein the forward channel disturbance component includes signal distortion for the forward channel caused by at least one hardware component of the transmitter node and/or the receiver node, and performing link adaptation for at least one of the spatially multiplexed streams based on the selected transmission pre-coding setting and the estimated forward channel disturbance component. Corresponding apparatus, transmitter node and computer program product are also disclosed.

Abstract: Methods and apparatus are provided. In an example aspect, a method in a wireless communication device of precoding symbols for transmission is provided. The method includes determining an indication of distortion of symbols transmitted by transmission apparatus of the wireless communication device or an indication of a correction for the distortion, determining precoding parameters based on the indication of distortion or the indication of the correction, and precoding symbols to be transmitted based on the precoding parameters.

Abstract: In one aspect, a method performed by a transmitter in a first device for signaling a nonlinearity profile of distortion of transmissions in a communications network is provided. The method includes generating an amplitude tracking reference signal (ATRS), wherein the ATRS comprises information indicating a nonlinearity profile of distortions of transmissions by the transmitter, and transmitting the generated ATRS towards a second device. In another aspect, a method performed by a receiver in a second device for identifying a nonlinearity profile of distortion of transmissions in a communications network by a transmitter in a first device is provided. The method includes receiving an ATRS from the first device, wherein the ATRS comprises information indicating a nonlinearity profile of distortions of transmissions by the transmitter and identifying the nonlinearity profile of distortion of transmissions by the transmitter based on the ATRS.

Abstract: Methods and apparatuses for adaptation of communication parameter are disclosed. According to an embodiment, a transmitter performs a first transmission to a receiver. The transmitter receives, from the receiver, first information related to one or more candidate constellation maps adapted to one or more current operating conditions, or second information usable for deriving the one or more candidate constellation maps. The transmitter determines a target constellation map based at least on the first information or the second information. The transmitter performs a second transmission to the receiver based on the determined target constellation map.

Abstract: The disclosure provides methods, a base station and network nodes relating to the assignment of pilot signals to wireless devices. One aspect provides a method including obtaining grouping information grouping one or more of the plurality of wireless devices together based at least in part on clustering information corresponding to each of the plurality of wireless devices and according to one or more clustering criterion, assigning at least one pilot signal to the one or more wireless devices based on the grouping information and transmitting the at least one pilot signal.

Abstract: A computer implemented method performed by a receiving node (110) in a wireless communications network (100), for detecting information in a first transmit signal (121) sent from a primary transmitting node (120) in the network, where the first transmit signal is comprised in a received signal (112). The received signal also comprises one or more interfering secondary transmit signals (131, 132).

Abstract: A method performed by a first network node for enabling a first wireless device to obtain background RF signal energy from background RF signals provided by the first network node and/or at least one second network node in a wireless communications network on a set of time-frequency resources is presented. The first network node estimates a background RF signal energy available to the first wireless device in each time-frequency resource in the set of time-frequency resources. The first network node determines a first subset of the set of time-frequency resources that the first wireless device is to use for obtaining background RF signal energy based on the estimated background RF signal energy. The first network node transmits information indicating the determined first subset of the time-frequency resources to the first wireless device. A network node a first wireless device and method therein are also provided.

Abstract: A method by a transmitting node for adapting a transmission mode based on a capability of a receiving node includes obtaining information indicating a capability of the receiving node to receive signals having a certain level of distortion. The transmitting node transmits a signal to the receiving node, the signal transmitted using a transmission mode selected based on the capability of the receiving node.

Abstract: In a first method, a wireless device estimates a delay profile of a channel impulse response, CIR, for a channel between a network node and the wireless device, compresses the delay profile using a compression function, and transmits the compressed delay profile. The compression function includes a first function and a quantizer. The first function is configured to receive input data and reduce a dimension of the input data. In a second method, a network node receives a compressed delay profile of CIR for a channel between a network node and a wireless device, decompresses the compressed delay profile using a decompression function, and estimates a position of the wireless device based on at least the decompressed delay profile. The decompression function includes a first function which is configured to receive input data and provide output data in a higher dimensional space than the input data.

Abstract: A method for jointly adapting hardware configurations (c1, c2) of a power amplifier (120), PA, and a digital to analog converter (110), DAC, in a radio transmitter (100). The method comprises obtaining (S1) a transmit signal quality requirement for an upcoming radio transmission, determining (S4) a maximum amount of distortion allowed to be contributed by the PA (120) and by the DAC (110) while meeting the transmit signal quality requirement. and jointly adapting (S5) the hardware configuration (c2) of the PA (120) and the hardware configuration (c1) of the DAC (110) to generate an amount of distortion below the maximum amount of distortion, while improving a secondary objective of the radio transmitter.

Abstract: There is provided mechanisms for beamformed transmission using a precoder. A method is performed by a radio transceiver device. The radio transceiver device comprises hardware. The hardware impacts transmission of signals from the radio transceiver device. The method comprises acquiring channel conditions of a radio propagation channel between the radio transceiver device and at least one other radio transceiver device. The method comprises determining a precoder, in form of a linear precoding matrix, for beamformed transmission towards the at least one other radio transceiver device. The precoder is determined according to the channel conditions and a model of how the hardware impacts the transmission of signals from the radio transceiver device. The method comprises transmitting, using the precoder, a signal towards the at least one other radio transceiver device.

Abstract: There is provided mechanisms for event-based triggering of second channel quality measures. A method is performed by a network node. The method comprises obtaining a first measure of channel quality of a radio propagation channel extending between the network node and a user equipment from measurements on an uplink signal received from the user equipment. The method comprises triggering, when determining that the first measure of channel quality causes an event-based triggering condition to be fulfilled, transmission of a further uplink signal from the user equipment for the network node to obtain a second measure of the quality of the radio propagation channel. Determining that the first measure of channel quality causes the event-based triggering condition to be fulfilled involves making a comparison between the first measure of channel quality and a reference channel quality.

Abstract: The present disclosure relates to methods to transmit and/or receive data in a wireless communications network, and a device performing the methods. In an aspect, a method of fora device configured to transmit data in a wireless communications network is provided. The method comprises acquiring a current value of at least one property affecting performance of the data transmission and determining a level of the performance attained with the current value of said at least one property. The method further comprises selecting, based on the determined level of the performance, at least one device configuration of a plurality of different device configurations allowing successful data transmission for the determined level of the performance and performing the data transmission applying the selected at least one device configuration.

Abstract: A computer implemented method in a transmitter for transmitting information carried by a signal over a channel to a receiver, wherein signal processing by the transmitter and by the receiver is degraded by one or more hardware impairments, the method comprising receiving feedback data indicating contextual information of the hardware impairments, selecting a signal format for use in generating the signal based on a mapping between the contextual information of the hardware impairments and a pre-determined set of signal formats, generating the signal based on the information and on the selected signal format, and transmitting the signal to the receiver.

Abstract: There is provided mechanisms for wireless energy transfer to a user equipment. A method is performed by a network node. The method includes configuring energy transfer to the user equipment as a function of a prediction of energy properties of the user equipment served by the network node and of properties for wireless communication with the user equipment. The method includes wirelessly transferring energy to the user equipment in accordance with the configured energy transfer.

Abstract: A method of operating a first wireless communication device includes transmitting a first message toward one or more wireless devices including a second wireless device, the first message indicating a need of the first wireless communication device to use shared network resources, receiving an indication from the second wireless device that it has available resources, utilizing the available resources of the second wireless device, transmitting a second message toward the one or more wireless devices, the second message comprising an entry for inclusion in a distributed transaction ledger of utilized resources that is shared among the one or more wireless devices, the entry indicating utilization of the available resources of the second wireless device by the first wireless communication device, and storing the entry in a local copy of the distributed transaction ledger.

Abstract: The present disclosure relates to a method performed by a network apparatus having a directional antenna arrangement in a wireless communication network. The method includes obtaining a scheduling decision for a wireless device served by the wireless communication network based on a traffic status and an energy status of the wireless device. Further, the method includes determining a first beamforming weight vector for information transmission and/or a second beamforming weight vector for energy transfer based on Channel State Information associated with the wireless device. The method further includes applying, to a signal, at least one of the determined first beamforming weight vector in order to transmit an information signal via the directional antenna arrangement to the wireless device and the determined second beamforming weight vector in order to transmit an energy signal via the directional antenna arrangement to the wireless device, based on the obtained scheduling decision.

Abstract: A computer implemented method for detecting data (y) comprised in a part (x) of a received signal (w) of a communication system (100), wherein the received signal (w) is associated with a population and where the part (x) of the received signal (w) is associated with a sub-population of the population, the method comprising: configuring (S1) a first function (ƒ1) to determine a context (c) of the received signal (w), wherein the context (c) is indicative of a state of the received signal (w), configuring (S2) a second function (ƒ2) to detect the data (y) based on the part (x) of the received signal, wherein the second function (ƒ2) is arranged to be parameterized by the context (c), and detecting (S3) the data (y) by the first (ƒ1) and second (ƒ2) functions.

Abstract: In a first method, a wireless device estimates a delay profile of a channel impulse response, CIR, for a channel between a network node and the wireless device, compresses the delay profile using a compression function, and transmits the compressed delay profile. The compression function includes a first function and a quantizer. The first function is configured to receive input data and reduce a dimension of the input data. In a second method, a network node receives a compressed delay profile of CIR for a channel between a network node and a wireless device, decompresses the compressed delay profile using a decompression function, and estimates a position of the wireless device based on at least the decompressed delay profile. The decompression function includes a first function which is configured to receive input data and provide output data in a higher dimensional space than the input data.