| 一种改进的自适应波束赋形算法 |
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| 引用本文： | 尹武,周继宇,单俊涛.一种改进的自适应波束赋形算法[J].无线电通信技术,2012,38(4):48-50. |
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| 作者姓名： | 尹武 周继宇 单俊涛 |
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| 作者单位： | 上海理工大学光电信息与计算机工程学院,上海,200093 |
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| 摘 要： | 为了弥补传统的LMS算法采用固定步长无法解决收敛速度和稳态误差之间矛盾的缺陷,改进了失调系数,提出了一种改进的LMS算法用于求解自适应波束赋形的最佳权值。理论分析证实归一化的LMS算法可以通过采用一个可变因子使瞬时输出误差最小化。仿真结果表明,归一化的LMS算法采用了可变步长比传统LMS算法收敛快,稳态误差和失调相对于LMS都有所改善。
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| 关 键 词： | LMS算法 失调系数 变步长 波束赋形 稳态性 |
An Improved Adaptive Beam Shaping Algorithm |
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| YIN Wu,ZHOU Ji-yu,SHAN Jun-tao.An Improved Adaptive Beam Shaping Algorithm[J].Radio Communications Technology,2012,38(4):48-50. |
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| Authors: | YIN Wu ZHOU Ji-yu SHAN Jun-tao |
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| Affiliation: | ( School of Optical-electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China) |
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| Abstract: | This paper puts forward a new improved LMS algorithm to solve the best weights of adaptive beam shaping,and improve disorder coefficients based on the traditional LMS algorithm. Through theoretical analysis,normalized LMS algorithm adopts a variable factor to minimize the instantaneous output error. The simulation results shows that, with variable step size, the normalized LMS algorithm has higher performance over the traditional LMS algorithm in terms of convergence rate,steady state error and disorder. |
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| Keywords: | LMS algorithm disorder coefficient variable step size beam shaping steady state |
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