Achieving High Spectral Efficiency with Adaptive Layered Space Time Codes under Rate Control

This paper investigates a new concept that combines space-time coding with the layered architecture of successive interference cancellation with per antenna rate control (PARC- SIC) for wireless MIMO channels, relying on partial feedback. The key element is to exploit an additional degree of freedom (DoF), namely antenna partitioning, in addition to decoding order and power control considering that the set of transmit antennas can be grouped into subsets. It is proved that this design theoretically achieves the open-loop capacity. In presence of a finite discrete modulation and coding scheme (MCS) rate set at transmitter, this new DoF allows to either fight back the resulting quantization noise or to reduce the feedback without much performance loss.