Methods and systems for determining indicators used in channel state information (CSI) feedback in wireless systems

摘要

Systems and methods are provided for determining channel state information (CSI) at a receiver for feedback to a transmitter to indicate properties of the communication channel. A signal is received at a receiver over a communication channel. An optimization value is determined based on the received signal and a plurality of matrix indicators. An amount of change in wideband properties of the communication channel is determined from the optimization value. Based on the determined amount of change, a CSI including a selected type indicator and a selected subset of the plurality of the matrix indicators is selected.

主权项

1. A method for determining channel state information (CSI) in a multiple input-multiple output transmission system, the method comprising:
receiving, at a receiver, a signal over a communication channel; determining an optimization value based on the received signal and a plurality of matrix indicators; determining, from the optimization value, an amount of change in wideband properties of the communication channel across a time interval; selecting, based on the determined amount of change, a CSI comprising a selected type indicator and a selected subset of the plurality of the matrix indicators, wherein the subset of the plurality of matrix indicators indicates the wideband properties of the communication channel when the amount of change in the wideband properties of the communication channel exceeds a threshold.