Mobility

Optimal Recursive Spatial Multiplexing Strategies for Slowly Time-Varying MIMO Channels

Date Added: Apr 2011
Format: PDF

The authors consider a simple closed-loop spatial multiplexing architecture, which can be incorporated into an outer system with off-the-shelf single-input single-output encoders/decoders. Instead of relying on transmitter-side channel state information for matching the layers of the multidimensional signal to the eigenmodes of the multiple-input multiple-output channel through a precoding, the eigenmodes with high attenuation are identified in the receiver and a retransmission of the affected signal parts requested through a feedback channel. The requested backup facilitates a linear array signal reconstruction subject to limited noise amplification.