Achieving Spatial Diversity via PARC for Future Wireless Communication Systems

The aim of this paper is to explore techniques to achieve spatial diversity based on per-antenna rate control (PARC) and develop more flexible schemes that can effectively achieve easy switching between spatial multiplexing and transmit diversity for future mobile systems. The basic idea is to input the same data in each PARC sub-stream and de-correlate these sub-streams via scrambling and/or interleaving techniques with the aim of diversity improvement. After comparing variants of PARC, it has been shown that transmitting the same data in each sub-stream and subsequently de-correlating the sub-streams with different interleaving and/or scrambling not only obtains very promising performance, but also has extremely low computational complexity.