抗多径噪声归一化合并SFH／MFSK系统在短波信道中的性能

抗多径噪声归一化合并SFH／MFSK系统在短波信道中的性能 PERFORMANCE OF ANTI-MULTIPATH NOISE-NORMALIZATION COMBINING SFH/MFSK SYSTEMS OVER A SHORT WAVE CHANNEL 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 分析了具有抗多径措施的噪声归一化合并ＳＦＨ／ＭＦＳＫ接收机在存在部分边带干扰的多径瑞利衰落信道中的性能，着重研究了多径加权因子ω对该系统性能的影响．结果表明，最佳加权困子ω与多径干扰强度、分集重数、调制阶数和信道热噪声有关．对多径合适地加权可明显地降低比特误码率Ｐｂ，在分集和编码相结合时，能使Ｐｂ下降２～３个数量级． Analyzes performance of noise-normalization SFH/MFSK Systems with antimultipath measures over a multipath Rayleigh fading channel with partial-band noise jamming, and emphasizes the effect of the multipath weighting factor ω on system performance.Results show that, the optimum weighting factor ω concerns the multipath interference strength diversity number L, modulation order M and channel thermal noise. Bit error rate （BER） can be apparently reduced by weighting moderately, and it decreases by 2 to 3 magnitudes when codes are combined with diversity. 抗多径 瑞利衰落 慢跳频 噪声归一化合并 antimultipath Rayleigh fading slow frequency hopping noise normalization combining TN911.1 国家自然科学基金,国防预研基金 1995-05-01 2021-04-01 5