Power Constrained Optimization for Two-hop Amplify-and-Forward MIMO Relay System

摘要：

Given a constraint of the total power on all relay nodes in a two-hop amplify-and-forward MIMO relay system, optimal power allocation strategies are studied with channel state information (CSI) feedback or channel distribution information (CDI) feedback under rayleigh fading channel. Based on the criterion of maximal channel capacity, optimal power allocation schemes are given in a closed form. The scenario A with both 1stand 2 nd hop CSI outperforms the scenario B with only 2 nd hop CSI and C without CSI. Compared with uniform power allocation among all relay nodes, it is shown that CSI is essential to improve capacity gain.

作者: Ying Wang Xiaodong Shen Baoling Liu Ping Zhang

作者单位: Wireless Technology Innovation Institute, Beijing University of Posts and Telecommunications, Beijing 100876 Key Laboratory of Universal Wireless Communication, Ministry of Education, P.R.China

会议类型: 国际会议

会议名称: 2007年通信、电路与系统国际会议(2007 International Conference on Communications,Circuits and Systems Proceedings)

会议地点: 日本福冈

会议语种:英文

在线出版日期: 2007-07-11（万方平台首次上网日期，不代表论文的发表时间）