OFDM系统中联合信道估计的载波同步算法的研究  

A joint method of carrier synchronization and channel estimation in OFDM system

作　　者：郭翘[1] 归琳[1] 张文军[1] 

机构地区：[1]上海交通大学图像通信与信息处理研究所,上海200030

出　　处：《信息技术》2006年第2期3-7,34,共6页Information Technology

基　　金：国家自然科学基金项目(60332030);国家863项目(2003AA123310)资助

摘　　要：针对采用正交频分复用(OFDM)调制的欧洲数字电视地面广播系统(DVB-T),详细分析了剩余载波频偏对信道估计的影响,并根据DVB-T特有的信道估计方式提出了与信道估计相结合的频域相位调整和时域补偿两种同步方案,仿真结果表明,在多径信道条件下,这两种同步方案能完全消除剩余载波频偏对信道估计的影响,且具有令人满意的性能。This paper first analyzes the effects on channel estimation made by the carrier frequency offset in digital video broadcasting terrestrial （ DVB - T） systems. Then according to the specific channel estimation method, it proposes two joint methods of carrier synchronization, using the phase adjustment in frequency domain and compensation in time domain. The simulation shows that these two synchronization strategy can eliminate the effects made by the residual frequency offset under different channel environments and it can provide satisfactory performance.

关 键 词：正交频分复用 信道估计 载波同步 

分 类 号：TN911[电子电信—通信与信息系统]