An Efficient Feedback Precoding for Space-Time Block Coded Spatial Multiplexing Systems with Outdated Channel Feedback

초록

An efficient precoder for space-time block coded spatial multiplexing systems is presented. The precoder is designed empirically by extending the concept of diagonally weighted orthogonal space time block codes to spatial multiplexing. The simulation results show that this scheme outperforms precoded spatial multiplexing systems using a predefined codebook when confronted with outdated channel feedback.