Systems and methods are described for radio frequency (RF) calibration in a multiple antenna system (MAS) with multi-user (MU) transmissions (“MU-MAS”) exploiting uplink/downlink channel reciprocity. The RF calibration is used to compute open-loop downlink precoder based on uplink channel estimates, thereby avoiding feedback overhead for channel state information as in closed-loop schemes. For example, a MU-MAS of one embodiment comprises a wireless cellular network with one or multiple beacon stations, multiple client devices and multiple distributed antennas operating cooperatively via precoding methods to eliminate inter-client interference and increase network capacity.

A method performed by a terminal in a wireless communication system includes: receiving, from a base station, configuration information associated with a channel state information (CSI) report including at least one information associated with a CSI resource setting; receiving, from the base station, information associated with channel occupancy duration; determining whether at least one symbol for receiving a channel state information reference signal (CSI-RS) is within channel occupancy duration, based on the at least one information associated with the CSI resource setting and the received information associated with the channel occupancy duration; receiving, from the base station, at least one CSI-RS on the at least one symbol, based on a result of the determining; and when the CSI report is determined to be transmitted, transmitting; to the base station, the CSI report based on the configuration information associated with the CSI report and the received at least one CSI-RS.

Certain aspects of the present disclosure provide techniques for quasi co-location (QCL) reference signals for uplink transmission configuration indicator (TCI) states. An example method generally includes receiving uplink transmission configuration indicator (TCI) indicating one or more quasi co-location (QCL) types, from a plurality of uplink QCL types, for one or more source reference signals (RSs); and sending an uplink transmission in accordance with the uplink TCI.

A reception method implemented by a reception device implementing a plurality of receive antennas. The method includes: estimating an interference covariance matrix representative of the spatial structure of the interference between the receive antennas; and transmitting at least one item of information about a quality of service associated with at least one acquisition technique for acquiring knowledge of the channel at transmission, able to be used by a transmission device implementing a plurality of transmit antennas, obtained from the interference covariance matrix.

Described are embodiments for uplink beam reporting. A wireless device determines an overlap in time between: a first uplink channel resource of a permissible exposure report for a cell and a second uplink channel resource of a channel state information (CSI) report for the cell. Based on the determined overlap in time, the wireless device drops the CSI report scheduled for transmission via the second uplink channel resource, and transmits the permissible exposure report via the first uplink channel resource.

A method, network node and wireless device (WD) for New Radio (NR)-WD antenna calibration for Long Term Evolution (LTE)-NR radio-shared systems are disclosed. According to one aspect, a method in a network node configured to communicate with first wireless devices according to a first radio access technology and to communicate with second wireless devices according to a second radio access technology is provided. The method includes determining a delay and phase error at a first processing block based at least in part on feedback from at least one of the first wireless devices. The method also includes compensating a first transmitted signal based at least in part on the determined delay and phase error. The method further includes compensating at a second processing block a second transmitted signal based at least in part on the determined delay and phase error received from the first processing block.

Introduced here is at least one technique to better estimate interference at a receiver. The technique includes receiving a plurality of reference signals, which each have information indicative of noise. Thus, the technique further includes, for each reference signal, determining a noise estimation and determining a distance metric and log-likelihood ratio (LLR) of the noise estimation. Once the distance metric and LLR of each reference signal is determined, the receiver can determine a final LLR based on the distance metric and LLR of each reference signal. In this manner, a final LLR is determined. This technique can be applied by any device operating on MIMO technology.

Presented are systems and methods for acquiring channel state information. A wireless communicate node may transmit a channel state information reference signal (CSI-RS) to a wireless communication device via a first antenna port of a plurality of antenna ports of the wireless communication node. The wireless communication node may receive a channel state information (CSI) report from the wireless communication device.

The present disclosure provides a method in a network device serving a first cell and a second cell. The method includes: determining that a first User Equipment, UE, in the first cell and a second UE in the second cell are associated with one physical terminal device; and enabling, in response to said determining, the terminal device to perform as the first UE, without enabling the terminal device to perform as the second UE, one or more of: measuring a reference signal from the network device, transmitting a reference signal to the network device, or transmitting a measurement report to the network device.

A terminal according to one aspect of the present disclosure includes: a receiving section that receives configuration information indicating whether or not to include an identifier of a panel related to a CSI report in the CSI report; and a transmitting section that transmits the CSI report including the identifier of the panel when the configuration information is received. According to one aspect of the present disclosure, a panel specific CSI report can be appropriately used.