| 适用于高阶QAM信号的混合型盲均衡算法 |
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| 引用本文： | 吴迪,葛临东,王彬.适用于高阶QAM信号的混合型盲均衡算法[J].信息工程大学学报,2010,11(1):45-48. |
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| 作者姓名： | 吴迪 葛临东 王彬 |
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| 作者单位： | 信息工程大学,信息工程学院,河南,郑州,450002 |
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| 基金项目： | 河南省基础与前沿研究资助项目 |
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| 摘 要： | 为了提高高阶QAM信号的盲均衡性能，提出了MMA—DD和SIGN-MMA-DD两种改进的混合型盲均衡算法。首先，MMA—DD算法将多模盲均衡算法和判决引导算法有机结合，并采用均方误差来控制两者在混合误差中的比例，降低了均衡器的稳态误差。然后对MMA．DD算法在误差计算和均衡器系数更新两方面进行简化，得到SIGN—MMA—DD算法，有效地降低了运算复杂度。仿真结果表明，两种算法的盲均衡性能优于多模盲均衡等算法。
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| 关 键 词： | 混合盲均衡 多模算法 判决引导算法 高阶QAM |
ybrid Blind Equalization Algorithm for High Order QAM Signals |
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| WU Di,GE Lin dong,WANG Bin.ybrid Blind Equalization Algorithm for High Order QAM Signals[J].Journal of Information Engineering University,2010,11(1):45-48. |
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| Authors: | WU Di GE Lin dong WANG Bin |
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| Affiliation: | (Institute of Information Engineering, Information Engineering University, Zhengzhou 450002, China) |
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| Abstract: | In order to improve the blind equalization performance for high-order QAM signals , two mended hybrid blind equalization algorithm MMA-DD and SIGN-MMA-DD are proposed in this pa-per. First, the MMA-DD algorithm combines the benefits of the MuhiModulus Algorithm (MMA)and the Decision-Directed Algorithm (DD), utilizes mean square error to control the proportion of two kind of error signals in total error signals and decreases the steady-state error. Besides, the SIGN-MMA-DD algorithm uses the sign operation in error computation and the equalizer tap update, and seduces the computational complexity. Simulation results demonstrate that compared with other MultiModulus blind equalization algorithms, the two proposed algorithms provide superior perform-ance. |
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| Keywords: | hybrid blind equalization multimodulus algorithm decision-directed algorithm high-order QAM |
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