Robust Feedback Scheme for Precoding Systems Based on Finite-Rate Feedback

摘要：

precoding system based on finite-rate feedback, the receiver sends a precoding matrix to the transmitter via a feedback channel. The overall system performance is degraded due to feedback error. In this paper, we propose a robust feedback scheme that employs the index permutation technique to provide the system with redundancy-free protection against the feedback error. The wireless channel is assumed to experience Rayleigh fading, and the feedback channel is modeled as a discrete memoryless channel (DMC). Using the average chordal distance as a metric, the design of the index permutation in the feedback scheme is formulated into a minimization problem. An upper bound on the average chordal distance is derived, and the permutation design problem is simplified based on the bound. A modified binary switching algorithm is then developed to search for good permutations. Simulation results show that the proposed feedback scheme well compensates for the performance degradation caused by feedback error.

作者: Pengcheng Zhu Yan Wang Xiaohu You Lan Tang

作者单位: National Mobile Communications Research Laboratory,Southeast University, Nanjing, 210096, P.R.China School of Electronic Science and Engineering,Nanjing University, Nanjing, 210093, P.R.China

会议类型: 国际会议

会议名称: 2010年无线通信与信号处理国际会议

会议地点: 上海

会议语种:英文

页码: 1-5

在线出版日期: 2010-10-20（万方平台首次上网日期，不代表论文的发表时间）