| 基于联合误差控制的变步长双模盲均衡算法研究 |
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| 引用本文： | 李世平,王爱红,王隆,单凤丽.基于联合误差控制的变步长双模盲均衡算法研究[J].微型机与应用,2012,31(11):51-54. |
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| 作者姓名： | 李世平 王爱红 王隆 单凤丽 |
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| 作者单位： | 东北大学信息科学与工程学院,辽宁沈阳,110819 |
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| 摘 要： | 针对CMA+DDLMS双模式盲均衡算法对相位不敏感、收敛速度慢、突然切换容易造成误码率升高以及算法不稳定等问题,提出一种基于联合误差控制的变步长双模切换盲均衡算法。与现有双模式算法相比,新算法引入变步长因子有效提高算法收敛速度,同时采用联合绝对剩余误差和判决区域控制的双模切换保证算法的稳健性。采用16QAM系统的仿真结果表明,新算法具有抗干扰能力强、收敛精度高和收敛速度快等特点。
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| 关 键 词： | 盲均衡 变步长 VSMCMA-DDLMS算法 最小均方算法 双模切换 判决域 |
Varying step modified dual-mode blind equalization algorithm based on joint error function |
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| Li Shiping,Wang Aihong,Wang Long,Shan Fengli.Varying step modified dual-mode blind equalization algorithm based on joint error function[J].Microcomputer & its Applications,2012,31(11):51-54. |
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| Authors: | Li Shiping Wang Aihong Wang Long Shan Fengli |
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| Affiliation: | (College of Information Science and Engineering,Northeastern University,Shenyang 110819,China) |
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| Abstract: | In order to solve the problems of the steady-state error,low convergence rate and convergence precision of the CMA+DDLMS dual-mode blind equalization,a variable step and modified dual-mode blind equalization algorithm is proposed.The proposed algorithm can overcome the phase rotation on the base of quick convergence and make dual-mode switch more stable by adopting the absolute error and decision region control.The simulation result of 16QAM system proves that the improved algorithm has strong suppression ability of ISI,higher convergence precision and fast convergence rate. |
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| Keywords: | blind equalization variable step VSMCMA-DDLMS algorithm LMS dual-mode switch decision domain |
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