Bi-Directional Use of Spatial Resources and Effects of Spatial Correlation

作者：Ju Hyungsik^*; Shang Xiaohu; Poor H Vincent; Hong Daesik

来源：IEEE Transactions on Wireless Communications, 2011, 10(10): 3368-3379.

DOI：10.1109/TWC.2011.081011.101955

• Multiple antennas
• two-way communication
• achievable rate
• fading correlation

In multiple antenna systems, spatial fading correlation causes a significant degradation in performance. In this work, a method for reducing the sensitivity to spatial fading correlation through the bi-directional use of spatial resources is investigated. Firstly, the concept of bi-directional use of spatial resources is introduced and the fading characteristics of the proposed bi-directional multiple-input multiple-output (B-MIMO) system are investigated. The achievable rates of the B-MIMO system are then investigated and compared with those of conventional MIMO systems for beamforming and full rank transmission. Based on those results, conditions needed for the B-MIMO system to demonstrate a larger average achievable rate are evaluated. B-MIMO systems are found to efficiently reduce the sensitivity to spatial fading correlation, while supporting comparable achievable rates in spatially white environments.

• 出版日期2011-10