| 一种改进的多模盲均衡算法 |
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| 引用本文： | 朱宏光,刘迁迁,王向前.一种改进的多模盲均衡算法[J].计算机与网络,2011(15):59-62. |
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| 作者姓名： | 朱宏光 刘迁迁 王向前 |
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| 作者单位： | 中国电子科技集团公司第五十四研究所,河北石家庄050081 |
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| 摘 要： | 阐述了用于盲均衡的恒模算法的数学模型和基本原理。对修正恒模算法、多模算法和修正多模算法进行了分析。与恒模算法相比，多模算法具有较小的剩余误差和码间干扰。修正恒模算法和修正多模算法则克服了相位偏移。针对修正多模算法存在的收敛速度慢的问题，在其误差函数的基础上给出了一种改进的多模算法。仿真结果表明，改进算法收敛速度快，剩余误差小而且能克服相位偏移，具有很好的实用性。
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| 关 键 词： | 盲均衡 多模算法 收敛速度 代价函数 |
An Algorithm of Improved Multi-Modulus Blind Equalization |
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| ZHU Hong-guang,LIU Qian-qian,WANG Xiang-qian.An Algorithm of Improved Multi-Modulus Blind Equalization[J].China Computer & Network,2011(15):59-62. |
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| Authors: | ZHU Hong-guang LIU Qian-qian WANG Xiang-qian |
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| Affiliation: | (The 54th R.esearch Institute of CETC, Shijiazhuang Hebei 050081, China) |
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| Abstract: | The mathematical models and basic theory of Constant Modulus Algorithra （CMA） for blind channel equalization are expounded firstly. Modified CMA, Multi-Modulus Algorithm （MMA） and Modified Multi-Modulus Algorithm （MMMA） are analyzed. MMA has smaller residual error and a fewer intersymbol interference （ISI） than those obtained by using CMA. MCMA and MMMA overcome the phase offset. According to the deficiency of slow convergence MMMA, an improved MMA is proposed based on the cost function of MMMA. Simulation results show that the improved algorithm has fast convergence, small residual error and can overcome the phase offset. So it is of practical importance. |
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| Keywords: | blind equalization multi-modulus algorithm convergence speed cost function |
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