Doppler Delay Codebook-based Precoding and CSI Reporting for Wireless Communities

摘要

A communication device for providing channel state information (CSI) feedback in a radio communication system is a transceiver for receiving a radio signal from a transmitter via a time-varying frequency-selective MIMO channel, wherein the radio signal is Includes a transceiver and a processor, including a downlink reference signal with a reference signal configuration including several antenna ports and a downlink signal including a reference signal configuration. The processor uses measurements of the downlink reference signal on the radio channel provided over a specific observation time to estimate an explicit CSI in the frequency domain and one or more of the combined Doppler delay beam three-stage precoders. Combined Doppler delay based on one or more codebooks containing a transmitter spatial beam component, one or more delay components of a composite Doppler delay beam three-stage precoder, and one or more Doppler frequency components of a composite Doppler delay beam three-stage precoder. A Doppler delay precoder matrix (W) for the beam three-stage precoder is selected based on performance indicators, with an explicit CSI and a composite Doppler delay beam three-stage precoder with the selected Doppler delay beam precoder matrix (W). Use to calculate one or more of the Channel Quality Indicator (CQI), and / or the Precoder Matrix Indicator (PMI), and / or the Rank Indicator (RI), CQI and / or PMI and / or CSI feedback containing any one or more of the RIs is reported to the transmitter, and the PMIs and RIs are used to indicate the Doppler delay beam three-stage composite precoder matrix for the configured antenna ports. [Selection diagram] Fig. 4