TR2009-075

Parametric Compression of Rank-1 Analog Feedback in MIMO-OFDM



We consider the problem of channel state information (CSI) transmission on a fast feedback link for a multiuser-MIMO OFDM system. We compose codebook based feedback with analog based feedback and propose a new compressed analog feedback suitable for correlated antennas that provides excellent tradeoff between uplink overhead and downlink throughput.