For future wireless systems, it is desired to keep network implementation aspects, such as transmission point selection, precoder selection, etc, transparent to the terminal. This means that terminals are envisaged to be unaware of e.g. from which specific network node a transmission is made. This may be referred to as the transparency principle. The proposed solution comprises enabling a receiver to determine a type of antenna association that may be assumed in regard of two blocks of information, based on the result of the decoding of e.g. the first data block. The determination is done in a way such that the principle of transparency is not broken.

A method and a device for sending parameters of a precoder in a wireless communication system are disclosed. According to one aspect, the method comprises: sending, to a network node, an indication of a subset of beams selected from a plurality of orthogonal beams and an indication of power levels of the selected subset of beams, for a first frequency granularity; and sending, to the network node, an indication of phases of the selected subset of beams, for a second frequency granularity, wherein the indication of the selected beams, the indication of the power levels of the selected subset of beams and the indication of the phases of the selected subset of beams are part of the parameters of the precoder.

A method and apparatus optimize antenna precoder selection with coupled antennas. A power metric corresponding to each precoder of a plurality of precoders can be received at a receiving device. Reference signals can be received. A transmission channel corresponding to each precoder can be estimated based on the reference signals. The estimate of the transmission channel can be scaled based on the power metric for each precoder. A channel quality metric for each precoder can be generated based on the scaled estimate of the transmission channel. An index of a precoder with the largest channel quality metric can be transmitted.

The disclosure relates to a method performed in a wireless device for establishing a feedback metric. The wireless device is configured with a grouping of available precoding matrix indicators, PMIs, of a codebook, the grouping comprising two or more groups each of which comprises an exclusive subset of the available precoding matrix indicators, PMIs. The method comprises: identifying for one or more rank indicator, RI, hypotheses a respective parent PMI providing the highest link quality metric, LQM; establishing for one or more of the identified parent PMIs, a respective set of child PMIs; determining a link quality metric, LQM for each child PMIs of the established one or more sets of child PMIs; and establishing the feedback metric to be the child PMI having the highest link quality metric, LQM. The disclosure also relates to a wireless device, method in a network node, network node, computer programs and computer program products.

There are provided systems, methods, and interfaces for optimization of the fronthaul interface bandwidth for Radio Access Networks and Cloud Radio Access Networks.

A transceiver having a virtual array is disclosed that includes a transmit antenna array and a receive antenna array. The transmit antennas are spaced apart by a transmit array spacing. Similarly, the receive antennas are spaced apart by a receive array spacing. One of the receive and transmit arrays has more antenna elements than a ratio of either the transmit array spacing divided by the receive array spacing or of the receive array spacing divided by the transmit array spacing.

A method for operating a user equipment comprises receiving configuration information including information on a beam indication indicating N uplink (UL) transmit beams, where N>1; receiving the beam indication; determining whether an event is detected; selecting a beam from the N UL transmit beams based on whether the event is detected or not; and transmitting an UL transmission using the selected beam, wherein the beam refers to a spatial property used to receive or transmit a source reference signal (RS).

The present disclosure relates to a communication technique converging a 5G communication system with IoT technology to support a higher data transmission rate compared to a 4G system. The present disclosure can be applied to intelligent services (for example, smart homes, smart buildings, smart cities, smart cars or connected cars, healthcare, digital education, retail, security- and safety-related services) based on 5G communication technology and IoT-related technology. The present invention relates to a method for controlling transmission power of a terminal in a wireless communication system. More particularly, a method for the terminal according to one embodiment of the present invention, comprises the steps of: receiving a power control command from a base station; determining a power control value according to the power control command; determining power control information according to the power control command: determining the number of RF chains required for power control based on the power control information: and controlling the transmission power using a beam pattern according to the determined number of RF chains.

A system and method for beamforming beams including: matching weights T to a distribution of resources for each of the beams based on a traffic variation for each of the beams; calculating, with a signal processor for each of the beams based on the weights T, a power scalar β and a weighted minimum mean squared error (WMMSE) matrix W.sub.WMSE; and transmitting/receiving the beams based on the power scalar β and the WMMSE matrix W.sub.WMSE, where the power scalar β satisfies a total power constraint of an antenna subsystem.

Aspects relate to beam management reports that enable selection of best antenna panel and beam combinations for uplink transmissions from a user equipment (UE) when one or more antenna panels of the UE are subject to a maximum permissible exposure (MPE) limit. The UE receives a reference signal at a plurality of antenna panels, wherein the reference signal is received in different beams on each of the plurality of antenna panels. The UE determines N beams providing highest measured strengths of the reference signal on at least one of the plurality of antenna panels, wherein the MPE limit is to be applied to the at least one of the plurality of antenna panels for uplink transmissions. The UE transmits a beam management report including reduced highest measured strengths of the reference signal in the N beams to account for the MPE limit.