A Novel Doppler Shift Estimation Algorithm for OFDM-based Transform Domain Communication Systems

摘要：

　　In this paper,we investigate the impact of Doppler shift on bit error rate (BER) in OFDM-based transform domain communication system (TDCS) and propose a novel Doppler shift estimation algorithm to recover the system performance.The Doppler shift estimation algorithm in OFDM systems is robustly designed and can be applied in OFDM-based TDCS.However,the accuracy of these existing estimation algorithms will degrade seriously when the signal to noise ratio (SNR) is low.An attractive feature of the proposed algorithm is that it can utilize characteristics of OFDM-based TDCS to estimate Doppler shift accurately with SNR as low as-10dB.Simulation results demonstrate that the proposed algorithm can eliminate the effects of additive noise to estimation accuracy.Furthermore,we show that the system performance improved significantly after Doppler shift compensation.

关键词： OFDM TDCS Doppler shift estimation, crosscorrelation peak value cyclic shift

作者: Yan Zheng Xuemai Gu Qing Guo

作者单位: Communication Research Center, Harbin Institute of Technology, Harbin, China

会议类型: 国际会议

会议名称: 2012 IEEE 11th International Conference on Signal Processing (第11届IEEE信号处理国际会议)

会议地点: 北京

会议语种:英文

页码: 1449-1453

在线出版日期: 2012-10-21（万方平台首次上网日期，不代表论文的发表时间）