Description

Statistically robust design for multi user multiple-input multiple-output (MIMO) relay systems with direct source-destination links and imperfect channel state information ( CSI). T he minimum mean-squared error (MMSE) of the signal waveform estimation at t he destination node is adopted as t he design criterion. We develop two iterative methods to solve the n on convex joint source, relay, and receiver optimization problem. Simulation results demonstrate t he improved robustness of the proposed algorithms against CSI errors.