New Design for Linear Precoding over STBC in the Presence of Channel Correlation

In order to exploit spatial correlation in a multiple input multiple output (MIMO) channel using precoding over Space-Time Block Codes (STBC), an approach was proposed for the design of a linear precoder [3]. This approach works well for orthogonal STBC bus fails in the case of non-orthogonal STBC. Based on a Min-Max problem formulation, a new design of the linear precoder is proposed ihn this paper. Simulation results in the case of quasi-orthogonal STBC (ABBA) are presented in order to show the gain over the conventionaal design approach and the non-precoded system.