| 基于正交小波包变换的前馈神经网络盲均衡算法 |
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| 引用本文： | 郭业才,高敏,张艳萍.基于正交小波包变换的前馈神经网络盲均衡算法[J].电子测量与仪器学报,2009,23(11):59-64. |
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| 作者姓名： | 郭业才 高敏 张艳萍 |
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| 作者单位： | 1. 南京信息工程大学电子与信息工程学院,南京,210044
2. 安徽理工大学电气与信息工程学院,淮南,232001 |
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| 基金项目： | 全国博士论文作者专项基资金，江苏省高等学校自然科学基金，江苏省"六大人才高峰"培养对象资助，江苏省自然科学基金，南京信息工程大学科研机构和创新团队(2009) |
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| 摘 要： | 针对前馈神经网络盲均衡算法收敛速度慢、均方误差大的缺点,在分析前馈神经网络盲均衡算法和正交小波包变换理论的基础上,提出了基于正交小波包变换的前馈神经网络盲均衡算法。该算法利用正交小波包变换良好的去相关性,对前馈神经网络均衡器输入信号进行预处理后,降低了输入信号的自相性,从而加快了收敛速度和减小了均方误差。水声信道的仿真结果表明,该算法在收敛速度与均方误差方面的性能比前馈神经网络盲均衡算法优越。
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| 关 键 词： | 盲均衡 水声信道 正交小波包变换 前馈神经网络 |
Feedforward neural network blind equalization algorithm based on orthogonal wavelet packet transform |
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| Guo Yecai,Gao Min,Zhang Yanping.Feedforward neural network blind equalization algorithm based on orthogonal wavelet packet transform[J].Journal of Electronic Measurement and Instrument,2009,23(11):59-64. |
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| Authors: | Guo Yecai Gao Min Zhang Yanping |
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| Affiliation: | Guo Yecai Gao Min Zhang Yanping (1. College of Electric and Information Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China; 2. School of Electronic and Information Engineering, Anhui University of Science and Technology, Huainan 232001, China) |
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| Abstract: | Aiming at the defects of the slow convergence rate and bigger mean square error of Feedforward Neural Network(FNN)blind equalization algodthrn and better performance of Orthogonal Wavelet Packet Transform(OWPT),a FNN blind equalization algorithm based on OWPT(OWPT FNN)was proposed.In the proposed owvr-FNN algorithm,orthogonal wavelet transform of input signal to FNN was carried out,and the correlation of the input signals was de-correlated by wavelet transform.Accordingly,the proposed OWPT-FNN algorithm has ability to improve the convergence rate and to reduce the mean square error,and outperforms FNN blind equalization algorithm in the convergence rate and the mean square error.The efficiency of the proposedOWPT-FNN algorithm was proved by computer simulation in underwater acoustic channels. |
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| Keywords: | blind equalization underwater acoustic channels orthogonal wavelet packet transform feedforward neural network |
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