| Single-User Blind Channel Equalization Using Modified Constant Modulus Algorithm |
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| 引用本文： | 孙守宇 郑君里 吴里江 张琪. Single-User Blind Channel Equalization Using Modified Constant Modulus Algorithm[J]. 清华大学学报, 2004, 9(1): 38-44 |
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| 作者姓名： | 孙守宇 郑君里 吴里江 张琪 |
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| 作者单位： | [1]DepartmentofElectronicEngineering,TsinghuaUniversity,Beijing100084,China [2]BeijingInstituteofInformationTechnology,Beijing100088,China |
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| 基金项目： | the National Natural Science Foundation of China (60072001) |
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| 摘 要： | A modified constant modulus algorithm (MCMA) for blind channel equalization is proposed by modifying the constant modulus error function. The MCMA is compared with the conventional constant modulus algorithm (CMA) for symbol-spaced equalization of 4PSK signals. The result shows that the performance of the MCMA is superior to that of the CMA in both convergence rate and intersymbol interference for frequency selective channels in noisy environments. Simulation results using 8PSK signals also demonstrate that a fractionally spaced equalizer can preserve performance over variations in symbol-timing phase, whereas a baud-rate equalizer cannot.
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| 关 键 词： | 盲信道均衡 修正恒定模数算法 MCMA 误差函数 收敛速率 |
Single-User Blind Channel Equalization Using Modified Constant Modulus Algorithm |
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| SUN Shouyu ,,,ZHENG Junli ,WU Lijiang. Single-User Blind Channel Equalization Using Modified Constant Modulus Algorithm[J]. Tsinghua Science and Technology, 2004, 9(1): 38-44 |
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| Authors: | SUN Shouyu ZHENG Junli WU Lijiang |
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| Affiliation: | SUN Shouyu 1,2,**,ZHENG Junli 1,WU Lijiang |
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| Abstract: | A modified constant modulus algorithm (MCMA) for blind channel equalization is proposed by modifying the constant modulus error function. The MCMA is compared with the conventional constant modulus algorithm (CMA) for symbol-spaced equalization of 4PSK signals. The result shows that the performance of the MCMA is superior to that of the CMA in both convergence rate and intersymbol interference for frequency selective channels in noisy environments. Simulation results using 8PSK signals also demonstrate that a fractionally spaced equalizer can preserve performance over variations in symbol-timing phase, whereas a baud-rate equalizer cannot. |
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| Keywords: | blind channel equalization constant modulus algorithm (CMA) modified constant modulus algorithm (MCMA) symbol spaced equalization fractionally spaced equalization (FSE) |
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