| LMS算法瞬态收敛特性研究 |
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| 引用本文： | 孙柏昶,秦建存. LMS算法瞬态收敛特性研究[J]. 无线电通信技术, 2006, 32(2): 26-28 |
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| 作者姓名： | 孙柏昶 秦建存 |
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| 作者单位： | 中国电子科技集团公司第54研究所,河北,石家庄,050081 |
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| 摘 要： | 对于时变信道,均衡算法的收敛性能是衡量该算法优劣的主要因素。根据LMS算法的输出均方误差值(MSE)与抽头系数协方差矩阵之间的关系,推导出在一定信道条件下,步长因子μ在满足输出均方误差值收敛的条件下的取值范围,最终推导出均方误差值达到收敛所需要的迭代次数。最后通过matlab仿真验证了理论推导结果的正确性。
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| 关 键 词： | LMS 自相关函数 MSE 步长因子 |
| 文章编号： | 1003-3114（2006）02-26-3 |
| 收稿时间： | 2005-11-21 |
| 修稿时间： | 2005-11-21 |
Study of influence factors on LMS algorithm''''s convergence performance |
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| SUN Bai-chang,QIN Jian-cun. Study of influence factors on LMS algorithm''''s convergence performance[J]. Radio Communications Technology, 2006, 32(2): 26-28 |
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| Authors: | SUN Bai-chang QIN Jian-cun |
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| Affiliation: | The 54th Research Institute of CETC, Shijiazhuang Hebei 050081, China |
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| Abstract: | The convergence performance is a major index of equalization algorithm under time varying channels. According to the relation between the MSE of LMS algorithm’s output and the cross-variance matrix of tap coefficient, this paper deduces the range of step factor while MSE of output is convergent under certain channel conditions, which lead to the deduction of iterative times for MSE of output to converge. |
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| Keywords: | LMS autocorrelation function MSE step factor |
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