| 适用于高阶QAM信号的双模式盲均衡算法及仿真 |
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| 引用本文： | 张艳萍,赵俊渭.适用于高阶QAM信号的双模式盲均衡算法及仿真[J].系统仿真学报,2005,17(1):238-240. |
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| 作者姓名： | 张艳萍 赵俊渭 |
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| 作者单位： | 西北工业大学声学工程研究所,西安,710072 |
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| 基金项目： | 国家自然科学基金资助项目(60372086)
国防科技重点实验室资助项目(514460401,03HK03002)。 |
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| 摘 要： | 提出了一种适用于QAM信号的双模式盲均衡算法，该算法以常规的CMA算法为初始模式，第二模式中分别对QAM信号的同相分量和正交分量进行均衡。通过判决条件对均衡器输出信号进行判决，使得该算法的迭代过程在两种模式之间自动切换，其收敛速度优于常数模算法CMA和基于判决圆环的双模式算法。通过水声多途信道的仿真实验，验证了该算法良好的收敛性能。
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| 关 键 词： | 水声信道 多途 常数模 盲均衡 |
| 文章编号： | 1004-731X(2005)01-0238-03 |
| 修稿时间： | 2003年12月30 |
Simulation of A Dual Mode Blind Equalization Algorithm Suitable for High-Order QAM Signals |
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| ZHANG Yan-ping,ZHAO Jun-wei.Simulation of A Dual Mode Blind Equalization Algorithm Suitable for High-Order QAM Signals[J].Journal of System Simulation,2005,17(1):238-240. |
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| Authors: | ZHANG Yan-ping ZHAO Jun-wei |
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| Abstract: | A dual-mode algorithm suitable for high-order QAM signals is presented . The algorithm uses the Constant Modulus Algorithm (CMA) as the first mode , and then , it switches to the second mode in which equalization of the in-phase and quadrature components of constellation symbols is implemented respectively . Based on the decision of the equalizer's output , its iteration process of the proposed algorithm switches between two modes automatically . It achieves a faster convergence compared with the CMA and the algorithm based on the circles. The simulation results show the better convergence rate of the proposed algorithm. |
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| Keywords: | underwater acoustic channel multipath constant modulus blind equalization |
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