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.
出处
《通信学报》
EI
CSCD
北大核心
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)
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
wireless communications technology
frequency domain differential detection
analysis of BER
orthogonal frequency division multiplexing
coherent bandwidth
coherent time
