计算机应用研究2012，Vol.29Issue(3)：1048-1050,3.DOI:10.3969/j.issn.1001-3695.2012.03.067
基于时频联合的OFDM系统载波频偏估计方案及FPGA实现
OFDM system carrier frequency offset estimation scheme based on joint time-frequency and FPGA realization
摘要
Abstract
This paper proposed a complete carrier frequency offset estimation scheme of jointing time and frequency for OFDM systems. First,it estimated the symbol coarse synchronization and the time domain decimal frequency offset estimation by using CAZAC preamble inserted in time domain. Then, used the continuous pilot inserted in frequency domain to estimate the integer frequency offset. And last, used continuous pilot of adjacent symbols to track the residual phase error to get the precise carrier frequency synchronization. And it gave the FPGA implementations of various parts of the algorithm and hardware circuit measured result. The simulation results show that the scheme can rapidly capture and track carrier frequency offset in ± N/2 sub-carrier interval. The scheme' s estimation accuracy is at 10-3 ~ 10 -4 , with good engineering practicability.关键词
正交频分复用/载波频偏/前导码/导频/工程实用性Key words
OFDM/ carrier frequency offset/ preamble/ pilot/ engineering practicability分类
信息技术与安全科学引用本文复制引用
刘晓明,吴德松,汪梦柔,王潇瀛..基于时频联合的OFDM系统载波频偏估计方案及FPGA实现[J].计算机应用研究,2012,29(3):1048-1050,3.基金项目
国家重点自然科学基金资助项目(51035008) （51035008）
