| 计算有效的多模盲均衡算法 |
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| 引用本文： | 刘锋,葛临东.计算有效的多模盲均衡算法[J].计算机工程与应用,2007,43(34):150-152. |
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| 作者姓名： | 刘锋 葛临东 |
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| 作者单位： | 解放军信息工程大学 信息工程学院，郑州 450002 |
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| 摘 要： | 为了进一步降低多模盲均衡算法的计算复杂度，研究了一类计算有效的量化误差多模算法。符号误差多模算法对误差信号取符号操作，降低了计算复杂度，易于硬件实现。采用抖动量化技术可以进一步提高符号算法的鲁棒性，但稳态均方误差性能有所下降。利用变步长策略的变步长抖动符号误差算法不仅收敛速率快，而且具有低稳态均方误差值。仿真结果验证了这三种算法的特性。
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| 关 键 词： | 盲均衡 抖动符号误差算法 多模算法 变步长 计算复杂度 |
| 文章编号： | 1002-8331(2007)34-0150-03 |
| 修稿时间： | 2007年4月1日 |
Computationally efficient multi-modulus blind equalization algorithms |
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| LIU Feng,GE Lin-dong.Computationally efficient multi-modulus blind equalization algorithms[J].Computer Engineering and Applications,2007,43(34):150-152. |
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| Authors: | LIU Feng GE Lin-dong |
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| Affiliation: | Institute of Information Engineering，Information Engineering University of PLA，Zhengzhou 450002，China |
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| Abstract: | The desire for further reduction in computational complexity has motivated quantized-error version of Multi-Modulus Algorithm(MMA).A class of computationally efficient multi-modulus blind equalization algorithms are presented.The Signed-Error Multi-Modulus Algorithm(SE-MMA),based on the use of signed-error,has lower computational complexity.In order to enhance the robustness properties of SE-MMA,a Dithered Signed-Error of MMA(DSE-MMA) based on the judicious use of dither,is pro-posed which results in an algorithm with robustness property closely resembling those of MMA with the cost of the degradation in steady-state Mean Square Error(MSE).Then a variable step-size version of DSE-MMA is presented,which has faster convergence speed and lower steady-state MSE.The performance of these algorithms are evaluated via simulations and have shown to have excellent performance as compared to the MMA,with substantially less complexity. |
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| Keywords: | blind equalization dithered signed-error algorithm multi-modulus algorithm variable step-size computational complexity |
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