Sony Group Corporation
Operating a terminal device and a base station in a wireless MIMO system

Abstract:

The present application relates to methods for operating a terminal device (31) and a base station (20) of a cellular wireless multiple-input and multiple-output, MIMO, system (10). An uplink precoding for transmitting uplink signals from a plurality of antenna elements (312) of the terminal device (31) to the base station (20) is determined. An uplink pilot signal using the uplink precoding and a radio resource of a transmission frame of the MIMO system is transmitted from the plurality of antenna elements (311). At the base station (20), a downlink precoding and uplink receive parameters are adjusted based on a receive property of the precoded uplink pilot signal from the terminal device (31).