多径衰落信道下频域差分检测OFDM系统的误码率分析  

Analysis of BER performance of frequency domain differential detection OFDM system in multipath fading channels

作　　者：宋立军[1] 唐友喜[1] 李少谦[1] 

机构地区：[1]电子科技大学通信抗干扰技术国家级重点实验室,四川成都610054

出　　处：《通信学报》2005年第2期9-14,共6页Journal on Communications

基　　金：国家自然科学基金资助项目(60272009);教育部博士点基金资助项目(20020614001)

摘　　要：在多径衰落信道条件下,分析了正交频分复用系统中频域差分检测的误码率性能,并进行了仿真验证。分析与仿真结果表明,信道相干时间和相干带宽均影响频域差分检测的误码率性能,信道相干带宽对频域差分检测的影响比信道相干时间的影响更大,频域差分检测适合于多径延迟扩展比较小的信道。Bit error rate (BER) performance of orthogonal frequency division multiplexing (OFDM) system in multipath fading channels using the frequency domain differential detection (FDDD) was analyzed, and the results were evaluated by simulation. The BER performance of FDDD was affected by both coherent bandwidth and coherent time of the channel, but the BER performance of FDDD is more sensitive to the change of coherent bandwidth, FDDD can be used to the multipath fading channel with shorter delay spread.

关 键 词：无线通信技术 频域差分检测 误码率分析 正交频分复用 相干带宽 相干时间 

分 类 号：TN929[电子电信—通信与信息系统]