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一种新的OFDM系统载波频率偏移估计和跟踪方案 被引量:7

A Novel Carrier Frequency Offset Estimation and Tracking Scheme for OFDM
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摘要 针对载波偏移使OFDM系统出现严重的子载波干扰和性能的下降,该文提出一种OFDM频偏估计和跟踪方案,载频捕获阶段频偏估计采用时域内插入等值导频的方法,载频跟踪阶段不需要导频,而是利用循环前缀来估计频率偏移并进行校正.仿真结果证实,该方案中导频辅助的频率偏移估计和载频跟踪不仅估计范围大,而且估计值准确,频偏校正后系统的性能能达到信道理想估计条件下的误比特率。 In this paper, a carrier frequency offset estimation and tracking scheme for OFDM is presented. Pilot-Symbol-Aided (PSA) estimation is used to estimate carrier frequency offset in OFDM system, and the carrier frequency tracking applies the cyclic prefix. The simulation results prove the PSA estimation of frequency offset is precise, and the carrier frequency tracking is available.
出处 《电子与信息学报》 EI CSCD 北大核心 2004年第10期1569-1574,共6页 Journal of Electronics & Information Technology
基金 863重大研究课题(2001AAl23016) 国家自然科学基金(60172052 60002009) 国家自然科学基金重大研究计划(90104018)资助项目
关键词 0FDM 频率偏移 频偏估计 导频辅助 载波跟踪 OFDM Frequency offset Frequency offset estimation Pilot-symbol-aided Carrier frequency tracking
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参考文献6

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