Feedback-Aided Pilot Placement for Two-Way Cooperative-OFDM

摘要：

We consider the use of channel feedback to determine the pilot placement for channel estimation of two-way OFDM relay links. We propose a feedback technique in which the pilot allocation mechanism is adapted to the doubly-selective channels. The reduction in the SNR due to channel estimation error is considered by the criteria of SNR gap ratio, thus, is utilized to design the pilot placement. A suboptimal but efficient algorithm, called the iterative pilot allocation (IPA) scheme, is proposed, where iterative exchanges between old pilot locations and the location of the worst data subcarrier are done. The efficacy of the proposed IPA scheme is demonstrated through numerical simulations.

关键词： OFDM channel estimation two-way relay networks pilot-placement feedback communications.

作者: Wei Wu Xin Jia Yueming Cai Huachao Hu

作者单位: Academy of Equipment Command & Technology, Beijing, 101416, China PLA University of Science and Technology, Nanjing 210007, China

会议类型: 国际会议

会议名称: 2011年无线通信与信号处理国际会议(WCSP 2011)

会议地点: 南京

会议语种:英文

页码: 1-5

在线出版日期: 2011-11-09（万方平台首次上网日期，不代表论文的发表时间）