On Gaussian MIMO BC-MAC Duality With Multiple Transmit Covariance Constraints

Owing to the special structure of the Gaussian Multiple-Input Multiple-Output (MIMO) Broadcast Channel (BC), the associated capacity region computation and beamforming optimization problems are typically non-convex, and thus cannot be solved directly. One feasible approach is to consider the respective dual Multiple-Access Channel (MAC) problems, which are easier to deal with due to their convexity properties. The conventional BC-MAC duality has been established via BC-MAC signal transformation, and is applicable only for the case in which the MIMO BC is subject to a single transmit sum-power constraint.

Provided by: Institute of Electrical & Electronic Engineers Topic: Mobility Date Added: Apr 2012 Format: PDF

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