| 选择式频率分集SFH／MFSK系统在短波信道中的性能 |
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| 引用本文： | 甘良才,余建国.选择式频率分集SFH／MFSK系统在短波信道中的性能[J].武汉大学学报(理学版),1995(1). |
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| 作者姓名： | 甘良才 余建国 |
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| 作者单位： | 武汉大学电子信息学学院 |
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| 基金项目： | 国家自然科学基金,国防预研基金 |
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| 摘 要： | 研究了选择式频率分集Ｍ进制频移键控慢跳频（ＳＦＨ／ＭＦＳＫ）系统在多径瑞利衰落信道中的性能，分析了部分边带干扰，多径干扰，信道热噪声和调制阶数Ｍ对无编码和有编码系统性能的影响．研究结果表明，多径干扰强度和信道热噪声对系统性能影响较大，分集仅能在一定程度上削弱它们对系统性能的影响，只有在分集与编码相结合，并采用适当的调制阶数Ｍ时，才能显著地改善系统的性能．
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| 关 键 词： | 频率选择式，多径衰落，分集与编码 |
PERFORMANCE OF SELECTIVE FREQUENCY SFH/MFSK SYSTEMS COMBINING DIVERSITY WITH CODES OVER A SHORT WAVE CHANNEL |
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| Gan Liangcai,Yu Jianguo.PERFORMANCE OF SELECTIVE FREQUENCY SFH/MFSK SYSTEMS COMBINING DIVERSITY WITH CODES OVER A SHORT WAVE CHANNEL[J].JOurnal of Wuhan University:Natural Science Edition,1995(1). |
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| Authors: | Gan Liangcai Yu Jianguo |
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| Abstract: | Studies the performance of selective frequency SFH/MFSK systems combining diwerslty with codes over a multipath rayleigh fading channel. The effect of multipath on uncomed and coded system performance is analyzed including partial--band interference, channel thermal noise and modulation orders M. Research indicates that the strength of multipath and channel thermal noise have great effect on the system performance. Diversity can reduce their effect in a way. Only employing the moderate moduation orders M and the technique that codes are combined with diversity, system performance can be dramatically improved. |
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| Keywords: | selective frequency multiputh fading diversity and codes |
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