A Novel Beamforming Method for Multiple Peer-to-Peer Relay Networks
One multi-antenna relay can support multiple peerto- peer communications in AF (amplify-and-forward) manner.All sources transmit their signals to the relay in the first time slot.In the second time slot,the relay multiplies its received signal with an amplifying matrix,and broadcasts it to the destinations.We propose a novel method to specify the amplifying matrix in which we decompose the amplifying matrix into two parts.The first part is an MMSE (minimum mean square error) receiving matrix,and the second part is a beamforming matrix based on the maximization of VSLNR (virtual signal-to-leakageplus- noise ratio).To apply our proposed algorithm,we first propose two simple power allocation methods: EPA (equal power allocation) and EGA (equal gain allocation),and then propose an optimization method using projection gradient algorithm.Numerical results show that our proposed algorithm outperforms the existing ZFBF (zero-forcing beamforming) algorithm and the optimal power allocation improves system performance significantly under asymmetric channel conditions.
Multiple peer-to-peer communications Relay beamforming MMSE VSLNR
Zheng Jimin Qin Mingnuan Zhang Xianda Hu Hongjun
China Xian Satellite Control Center Xian, China Department of Automation Xian Jiaotong University Xian, China 710000 Department of Automation Tsinghua University China Xian Satellite Control Center Xian, China 710043
国际会议
2012 IEEE 14th International Conference on Communication Technology(2012年第十四届通信技术国际会议(ICCT 2012))
成都
英文
156-162
2012-11-09（万方平台首次上网日期，不代表论文的发表时间）