Iterative Channel Estimation for Short Preamble Based OFDM/OQAM System

摘要：

The existed preamble structure for orthogonal frequency division multiplex/offset QAM (OFDM/OQAM) system requires two zero-value guard symbols to guarantee ISI and ICI avoidance (equivalent to 3/2 complex value symbols in OFDM with cyclic prefix system), which leads to OFDM/OQAM system with low spectrum efficiency. In this paper, we shorten the preamble with 1 zero-value guard symbol to improve the spectrum efficiency. Unfortunately, the residual inter symbol interference (ISI) from neighbor symbols degrade the channel estimation performance. Therefore, we propose an iterative channel estimation method for OFDM/OQAM system to remove the residual ISI. Simulation results demonstrate that short preamble with iterative channel estimation is an effective method for OFDM/OQAM system. Furthermore, as the number of iterative time increasing, BER performance of short preamble with iterative channel estimation is approximately close to perfect channel estimation.

作者: Su HU Gang WU Yue XIAO Shaoqian LI

作者单位: National Key Lab of Communication, University of Electronic Science and Technology of China, Chengdu, Sichuan province, China

会议类型: 国际会议

会议名称: 2009国际通信电路与系统学术会议(ICCCAS 2009)(2009 International Conference on Communications，Circuits and Systems)

会议地点: 成都

会议语种:英文

页码: 27-31

在线出版日期: 2009-07-23（万方平台首次上网日期，不代表论文的发表时间）