基于车载信息的多普勒频偏校正  

Doppler Frequency Offset Compensation based on Vehicular Information

作　　者：曾鸣[1] 胡宗福[1] 周游[1] 李昕[1] 

机构地区：[1]同济大学电信学院,上海201804

出　　处：《通信技术》2012年第10期11-14,17,共5页Communications Technology

基　　金：国家自然科学基金资助项目(批准号:60972002)

摘　　要：多普勒频偏是高速铁路环境下的宽带无线接入亟待解决的难点之一,以往的频偏校正方法将焦点集中于信号处理技术上,对于频偏校正性能的提升缓慢且有限。基于越来越准确的车载信息,提出了一种新的频偏校正方法。先利用高铁的车载信息,预先估算出频偏进行第一次补偿,再利用频偏估计相关算法估计和补偿残留频偏。仿真结果表明,方法复杂度低,补偿范围大,校正速度理想,能有效改善误码率。Doppler frequency offset is one of the difficulties in broad band wireless access under high-speed railway environment. The traditional frequency offset compensation methods focuses only on signal process technology, thus resulting in slow and limited performance improvement of frequency offset compensation. Based on the more and more accurate vehicular information, a new frequency offset compensation method is proposed, which first uses the vehicular information to estimate the frequency offset and make the first compensation, then uses the signal process correlation algorithm to estimate and compensate the residual frequency offset. Simulation result indicates that this method is of low complexity, wide compensation range and fast compensation speed, and could obviously improve the system BER.

关 键 词：高速铁路 宽带无线接入 多普勒频偏 频偏校正 

分 类 号：TN929.5[电子电信—通信与信息系统]