| 强窄带干扰条件下NLMS自适应均衡器的收敛性能分析 |
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| 引用本文： | 朱勇刚,姚富强,许金勇,柳永祥,朱义勇.强窄带干扰条件下NLMS自适应均衡器的收敛性能分析[J].解放军理工大学学报,2010,11(1):7-13. |
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| 作者姓名： | 朱勇刚 姚富强 许金勇 柳永祥 朱义勇 |
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| 作者单位： | 解放军理工大学通信工程学院;总参第63研究所;通信指挥学院; |
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| 基金项目： | 中国博士后科学基金资助项目(20070411066) |
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| 摘 要： | 为了解决强窄带干扰条件下NLMS(normalized least mean squre)自适应均衡器的收敛性能受到严重影响的问题,利用Butterweck高阶展开方法,分别针对理想信道和多径信道,分析了强窄带干扰条件下NLMS自适应均衡器收敛性能。给出了理想信道条件下自适应均衡器收敛时间的理论表达式,分析了非理想信道条件下,均衡器长度、干信比、多径以及干扰信号频率对收敛时间的影响。理论分析与仿真结果表明,理想信道条件下,自适应均衡器的收敛时间与均衡器的长度和干信比成正比,与窄带干扰的频率无关;多径信道条件下,自适应均衡器的收敛时间与干信比成正比,与均衡器的长度、信道的多径特性以及窄带干扰频率呈非线性关系。
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| 关 键 词： | 自适应均衡 非维纳效应 窄带干扰 收敛 |
Convergence analysis of NLMS adaptive equalizers
in presence of strong narrowband interference |
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| ZHU Yong-gang,YAO Fu-qiang,XU Jin-yong,LIU Yong-xiang and ZHU Yi-yong.Convergence analysis of NLMS adaptive equalizers
in presence of strong narrowband interference[J].Journal of PLA University of Science and Technology(Natural Science Edition),2010,11(1):7-13. |
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| Authors: | ZHU Yong-gang YAO Fu-qiang XU Jin-yong LIU Yong-xiang and ZHU Yi-yong |
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| Institution: | 1.Institute of Communications Engineering;PLA Univ.of Sci.& Tech.;Nanjing 210007;China;2.The 63rd Research Institute of the General Staff Headquarters;3.PLA Commanding Communications Academy;Wuhan 430010;China |
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| Abstract: | The convergence rate of the NLMS adaptive equalizer is affected seriously in the presence of strong narreuband interference.To solve this problem,based on the higher order Butterweck solution,the convergence performance of the NLMS adaptive equalizer was analyzed in the presence of narrowband interference.The analytical expression of convergence time was proposed for the ideal channel,while the effects of the equalizer length,ri,s,multipath factor and interference frequency were analyzed for the multipath c... |
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| Keywords: | adaptive equalizer non-Wiener effects narrowband interference convergence |
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