Diversity-Rate Considerations and Precoder Designing for Spatially Correlated Perfect Space-Time Block Codes
Precoders are designed at the transmitter to compensate the antenna correlation effect when space-time coding is used. In this paper, a linear precoder is designed for a new class of non-orthogonal space-time block codes called Perfect Space-Time Block Codes (PSTBC). The word "Perfect" stands for some remarkable characteristics such as full diversity, full rate and non-vanishing constant minimum determinant for increasing spectral efficiency. The performance of the system is degraded in the spatially correlated channel condition; therefore, the authors investigate the effect of channel correlation on diversity and coding gain of PSTBC.