摘要
通过仿真试验对使用了逐字符和多字符频域差分检测OFDM系统的误码率性能进行了比较。结果表明:当信道的相干带宽远大于多个差分编码字符的所占带宽时,多字符频域差分检测的性能优于逐字符差分;信道的相干带宽与多个字符所占带宽比较接近时,逐字符差分检测的性能好于多字符差分检测。
In this paper, the comparison of bit error ratio(BER) performance of symbol-by-symbol frequency domain differential detection(SS-FDDD) and multiple-symbol frequency domain differential detection(MS-FDDD) in orthogonal frequency division multiplexing system is obtained by simulation, the results indicate that when the whole bandwidth of the symbols used to MS-FDDD is much less than the coherent bandwidth of the channel, the BER performance of MS-FDDD is better than that of SS-FDDD; when the whole bandwidth of the symbols used to MS-FDDD is closed to the coherent bandwidth of the channel, the BER performance of SS-FDDD is better than that of Multiple-symbol frequency domain differential detection.
出处
《电子科技大学学报》
EI
CAS
CSCD
北大核心
2003年第5期512-515,共4页
Journal of University of Electronic Science and Technology of China
基金
国家自然科学基金
编号:60272009
教育部博士点基金
编号:20020614001
关键词
正交频分复用
频域差分
逐字符差分检测
多字符差分检测
orthogonal frequency division multiplexing
bit error rate
multiple-symbol frequency domain differential detection
symbol-by-symbol frequency domain differential demodulation
