西安电子科技大学学报(自然科学版)Issue(4):87-93,7.DOI:10.3969/j.issn.1001-2400.2014.04.016
多径信道下OFDM系统的采样频率偏移盲估计方法
Blind estimation algorithm of sampling frequency offset for the OFDM system over multipath channels
摘要
Abstract
In order to improve the performance of sampling frequency offset(SFO) estimation for the Orthogonal Frequency Division Multiplexing(OFDM) system in practical non-cooperation communications, this paper proposes a new sampling frequency offset estimation for the OFDM system estimation algorithm in multipath fading channels and the non-cooperation communications system.The proposed algorithm first uses an improved cycle spectrum to make a coarse estimation of the relative point,and then estimates accurately the relative point through another improved cycle spectrum.Finally,the estimated values of sampling frequency offset are obtained by the rate of change of the phase of the cycle spectrum in the relative point after j umping phase change and least square fitting.Simulation results show that the proposed algorithm has not only higher estimation accuracy but also better performance over multipath channels.关键词
采样频率偏移/正交频分复用/盲估计/循环谱/多径信道Key words
sampling frequency offset/orthogonal frequency division multiplexing/blind estimation/cycle spectrum/multipath channels分类
信息技术与安全科学引用本文复制引用
李兵兵,孙珺,刘明骞..多径信道下OFDM系统的采样频率偏移盲估计方法[J].西安电子科技大学学报(自然科学版),2014,(4):87-93,7.基金项目
国家自然科学基金资助项目(61271299) (61271299)
国家"863"高技术研究发展计划资助项目(2007AA01Z288) (2007AA01Z288)
高等学校学科创新引智计划资助项目(B08038) (B08038)