On the capacity of MIMO broadcast channels with partial side information
IEEE Transactions on Information Theory
High-SNR power offset in multiantenna communication
IEEE Transactions on Information Theory
MIMO Broadcast Channels With Finite-Rate Feedback
IEEE Transactions on Information Theory
High SNR Analysis for MIMO Broadcast Channels: Dirty Paper Coding Versus Linear Precoding
IEEE Transactions on Information Theory
On the Fading-Paper Achievable Region of the Fading MIMO Broadcast Channel
IEEE Transactions on Information Theory
Vector Precoding for Wireless MIMO Systems and its Replica Analysis
IEEE Journal on Selected Areas in Communications
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Transmitter precoding strategies achieve a large portion of the capacity promised in broadcast MIMO systems. However, these schemes generally require perfect channel information at the transmitter. In this paper, the impact of Gaussian additive noise in the channel information is investigated for a downlink system where the transmitter uses a zero forcing precoding strategy. It is shown that noise in the channel state information (CSI) induces T-distributed multiplicative noise at the receiver. The multiplexing gain and power offset of the scheme are calculated and compared against the corresponding perfect feedback system.