| 低轨道卫星信道特性及高路径解析度Rake接收 |
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| 引用本文： | 赵国栋,陈晓挺,刘会杰,梁旭文.低轨道卫星信道特性及高路径解析度Rake接收[J].上海航天,2009,26(5):52-55. |
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| 作者姓名： | 赵国栋 陈晓挺 刘会杰 梁旭文 |
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| 作者单位： | 中国科学院,微小卫星联合重点实验室,上海,200050 |
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| 摘 要： | 基于对考虑多径衰落的城市环境低轨道（LEO）卫星信道特性的分析和建模，对该环境中LEO卫星地面终端采用高路径解析度Rake合并的性能进行了研究。结果表明：此时Rake各分支的输出噪声相关，最大比合并（MRC）为次优，最小均方误差（MMSE）合并方法的性能更优。
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| 关 键 词： | 低轨道卫星 码分多址 多径衰落 Rake 最小均方差 |
Channel Model of LEO Satellite and High Resolution Rake Receiver |
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| ZHAO Guo-dong,CHEN Xiao-ting,LIU Hui-jie,LIANG Xu-wen.Channel Model of LEO Satellite and High Resolution Rake Receiver[J].Aerospace Shanghai,2009,26(5):52-55. |
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| Authors: | ZHAO Guo-dong CHEN Xiao-ting LIU Hui-jie LIANG Xu-wen |
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| Institution: | (Micro-Satellite State Key Joint Laboratory, CAS, Shanghai 200050, China) |
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| Abstract: | The performance of high resolution rake receiver for terminals of low earth orbit （LEO） satellite was analyzed based on the analysis and modeling of the LEO satellite channel at urban terrain because of the multi-path fading existing in this paper. The results showed that maximum ratio combination （MRC） was sub-optimal because the noise components at each finger outputs of the rake receiver were correlated, and minimum mean square error （MMSE） combination was optimal, which had higher performance than MRC. |
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| Keywords: | Rake |
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