On the Capacity of Fading MIMO Broadcast Channels with Imperfect Transmitter Side-Information

Details On the Capacity of Fading MIMO Broadcast Channels with Imperfect Transmitter Side-Information On the Capacity of Fading MIMO Broadcast Channels with Imperfect Transmitter Side-Information

2006-05-17

arxiv.org/abs/cs/0605079v1

Computer Science

Information Theory

Extended version of a paper of the same title that appeared in the Proceedings of the 43rd Annual Allerton Conference on Commu

Scientific paper

A fading broadcast channel is considered where the transmitter employs two antennas and each of the two receivers employs a single receive antenna. It is demonstrated that even if the realization of the fading is precisely known to the receivers, the high signal-to-noise (SNR) throughput is greatly reduced if, rather than knowing the fading realization \emph{precisely}, the trasmitter only knows the fading realization \emph{approximately}. The results are general and are not limited to memoryless Gaussian fading.

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