基于信道响应算法的OFDM多径同步技术  

Multi-path OFDM Synchronization based on Channel Response Algorithm

作　　者：黄勇[1] 

机构地区：[1]中国电子科技集团公司第十研究所,成都610036

出　　处：《通信技术》2013年第11期25-28,共4页Communications Technology

摘　　要：为了解决多径对OFDM(正交频分复用技术)同步的影响,提出了一种工程易实现的多径同步技术。首先分析了多径对同步的影响,并利用FFT(快速傅立叶变换)频谱特性,通过公式推导提出简化算法,从而节省系统资源,利于在工程中实现;利用差分算法产生粗同步和信道响应算法产生精同步的方式实现了多径下的准确同步。该方法易于在工程中实现,并对其他在多径下使用的系统都具有参考意义。A project-achievable OFDM synchronization technology is proposed, thus to avoid the multi- path effect. This paper first analyzes the effect of multi-path environment, then describes a simplified al- gorithm. And by making advantage of FFT spectrum characteristics, this simplified algorithm is derived, and the system resource saved. With differential algorithm for coarse synchronization and channel response algorithm for fine synchronization, the accurate synchronization under muhi-path environment is achieved. The scheme is easy in implementation, and thus could serve as a reference for other systems working in similar multi-path channel evironment.

关 键 词：正交频分复用技术 多径 FFT 同步 信道响应算法 

分 类 号：TN918[电子电信—通信与信息系统]