Minimum Distance-Based Limited-Feedback Precoder for MIMO Spatial Multiplexing Systems
Precoding is a well-known method to reach the promised performance and capacity of Multiple-Input Multiple-Output (MIMO) systems. Recent investigations, when the transmitter has the Channel-State Information (CSI), have revealed several precoding techniques. Minimum distance based precoders outperform precoders based on other criteria such as maximizing Signal-to-Noise Ratio (SNR), minimizing the mean square error and maximizing the minimum singular value of the equivalent channel. On the other hand, when the CSI is not available at the transmitter, one resorts to limited feedback precoding methods.