| 一种变步长星座匹配多模算法 |
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| 引用本文： | 崔蔚,林宝军.一种变步长星座匹配多模算法[J].计算机工程,2012,38(11):88-90. |
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| 作者姓名： | 崔蔚 林宝军 |
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| 作者单位： | 1. 中国科学院研究生院,北京100049;中国科学院光电研究院,北京100190;北京国科环宇空间技术有限公司,北京100190
2. 中国科学院光电研究院,北京,100190 |
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| 摘 要： | 常数模算法(CMA)在QAM信号上的星座图匹配，存在剩余误差大、无法纠正相位偏差等问题。为此，在研究盲均衡算法的基础上，根据高阶QAM 信号的星座图特点，构造新型的均衡估值函数，并采用误差能量作为步长变化的依据，提出一种变步长星座匹配多模算法。仿真实验结果表明，该算法具有较好的收敛效果，且能改善位偏转，保持CMA算法的鲁棒性。
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| 关 键 词： | 多模算法 高阶QAM 盲均衡 误差能量 变步长 星座匹配函数 |
| 收稿时间： | 2011-10-15 |
Variable Step-size Constellation Match Multiple Model Algorithm |
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| CUI Wei
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LIN Bao-jun.Variable Step-size Constellation Match Multiple Model Algorithm[J].Computer Engineering,2012,38(11):88-90. |
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| Authors: | CUI Wei LIN Bao-jun |
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| Affiliation: | 1.Graduate University of Chinese Academy of Sciences,Beijing 100049,China;2.Academy of Opto-electronics,Chinese Academy of Sciences,Beijing 100190,China;3.Beijing Trans-universe Space Technology Co.,Ltd.,Beijing 100190,China) |
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| Abstract: | A new variable step-size algorithm is proposed to reduce the residual error and the phase error caused by the mismatch of the Constant Modulu Algorithm(CMA) and constellations of the high-order QAM signals.The new algorithm takes the error energy as the step-size control criteria to get a balance between the convergence rate and the residual error.Simulation experimental result shows that compared with other blind equalization algorithm,the new algorithm gets a better residual error and phase recovery,and keeps the robustness unchanged. |
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| Keywords: | multiple model algorithm high order QAM blind equalization error energy variable step-size constellation match function |
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