噪声归一化合并的SFH／MFSK系统在短波信道中的性能

噪声归一化合并的SFH／MFSK系统在短波信道中的性能 PERFORMANCE OF SFH/MFSK SYSTEM IN A SHORT WAVE CHANNEL WITH NOISE-NORMALIZATION COMBINING 甘良才 1 first-author 余建国 1 武汉大学电子信息学学院 武汉大学电子信息学学院 College of Electronic information, Wuhan University College of Electronic information, Wuhan University 分析了噪声归一化合并的短波慢跳Ｍ进制频移键控（ＳＦＨ／ＭＦＳＫ）系统，在受到部分边带于扰多径莱斯（Ｒｉｃｉａｎ）衰落的短波信道中分集和编码的性能，研究了信道热噪声，调制阶数Ｍ对系统性能的影响。研究结果表明，多径干扰的强度对系统性能的影响较大，分集能有效地削弱部分边带干扰的影响，但单靠分集并不能有效地抵抗多径效应的影响，只有采用编码与分集技术相结合，才能有效地削弱部分边带干扰和较好地抗拒多径干扰的影响． Analyses coded performance with diversity for an M-ary frequency--shift-keying （MFSK） slow frequency hopped （SFH） receiver with Noise Normalization Combining over a multipath fading Rician short wave channel with partial-band interference. Channel thermal noise and modulation order M also are included in the analysis. Results show that multipath interference have great effects on the system preformance, diversity alone can reduce the effect of partial-band interfence,but can’ t effectively negate the degradation caused by multipath interference. Only the convolutlonal codes or block codes are combined with diversity, can it decrease the interference caused by the partialAnband jamming and increase the ability to anti-multipath. 慢跳频 多径瑞利衰落 噪声归一化 slow fnequeny-hopping multipath rayleigh fading noise-normalization TN911.1 国家自然科学基金,国防预研基金 1995-05-01 2021-04-01 5