Robust Precoding for Space Time Block Codes and Spatial Multiplexing Hybrid System

This paper proposes a robust precoding for the space time block codes (STBC) and spatial multiplexing (SM) hybrid system. The overall precoding is disassembled into independent precoder optimization of different STBC groups by decomposing the overall channel matrix into several independent virtual channel matrices, this method will considerably reduce the amount of the required feedback information. Also, the precoder optimization is based on a new derived SER bound and considers the uncertainty of the channel feedback. Simulation results demonstrate the performance of the proposed technique.