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多径信道下OFDM系统的采样频率偏移盲估计方法

李兵兵 孙珺 刘明骞

西安电子科技大学学报(自然科学版)Issue(4):87-93,7.
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

李兵兵 1孙珺 1刘明骞1

作者信息

  • 1. 西安电子科技大学 综合业务网理论及关键技术国家重点实验室,陕西 西安 710071
  • 折叠

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)

西安电子科技大学学报(自然科学版)

OA北大核心CSCDCSTPCD

1001-2400

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