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| 基于过采样的归一化累积量盲均衡算法 | |
| 引用本文： | 张晓琴,胡永生,张立毅.基于过采样的归一化累积量盲均衡算法[J].计算机应用,2013,33(9):2463-2466. |
| 作者姓名： | 张晓琴 胡永生 张立毅 |
| 作者单位： | 1. 天津大学 电子信息工程学院,天津 300072; 2. 天津商业大学 信息工程学院,天津 300134; 3. 天津大学 电子信息工程学院,天津 300072; 4. 滨州学院 计算机科学技术系,山东 滨州 256603 |
| 摘 要： | 传统的波特间隔均衡器只能补偿接收信号混叠的频率响应特性,并不能补偿信道畸变。针对这一问题提出一种基于过采样的归一化累积量算法,先对接收信号进行过采样,再利用变步长自适应调整均衡器的抽头系数,不仅能避免算法陷入局部最优,而且还能有效补偿信道畸变。仿真表明:引入过采样和变步长的盲均衡算法,有效地提高了收敛速度,降低了稳态剩余误差。 |
| 关 键 词： | 盲均衡 过采样技术 归一化 累积量 |
| 收稿时间： | 2013-03-14 |
| 修稿时间： | 2013-04-28 |
Normalized cumulant blind equalization algorithm based on oversampling technology |
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| ZHANG Xiaoqin , HU Yongsheng , ZHANG Liyi.Normalized cumulant blind equalization algorithm based on oversampling technology[J].journal of Computer Applications,2013,33(9):2463-2466. | |
| Authors: | ZHANG Xiaoqin HU Yongsheng ZHANG Liyi |
| Affiliation: | 1. School of Electric Information Engineering, Tianjin University, Tianjin 300072, China; 2. School of Information Engineering, Tianjin University of Commerce, Tianjin 300134, China; 3. Department of Computer Science and Technology, Binzhou University, Binzhou Shandong 256603, China |
| Abstract: | The traditional baud spaced equalizer is used to compensate the aliasing frequency response characteristics of the received signal, but it cannot compensate the channel distortion. Concerning this problem, a normalized cumulant blind equalization algorithm based on oversampling technology was proposed. The received signal was oversampled firstly, and then the variable step-size was used to adaptively adjust weight coefficients of equalizer. It can not only avoid falling into local optimum, but also compensate the channel distortion effectively. The simulation results show that the algorithm can effectively speed up the convergence, and reduce the steady residual error. |
| Keywords: | blind equalization oversampling technology normalization cumulant |
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