Robust uniform channel decomposition for MIMO communications

In point to point MIMO systems, uniform channel decomposition (UCD) has been proven to be optimal in BER performance and strictly capacity lossless when perfect channel state information (CSI) are assumed to be available at both the transmitter and receiver side. However, in practice, CSI is always contaminated by channel estimation error. In this paper, we proposed a novel Robust UCD scheme which is capable of improving the BER and capacity performance in the context of imperfect CSI compared with the conventional UCD scheme. We also derived the capacity lower bound of the MIMO channel using the Robust UCD scheme with channel estimation error.