| 基于小波变换的单通道盲分离中源信号数目估计算法 |
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| 引用本文： | 尹海昌.基于小波变换的单通道盲分离中源信号数目估计算法[J].科学技术与工程,2012,12(20):5039-5043. |
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| 作者姓名： | 尹海昌 |
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| 作者单位： | 1. 广东科学技术职业学院,珠海,519090
2. 信息工程大学,郑州,450002 |
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| 摘 要： | 推导了常用数字调制信号的小波变换幅度函数表达式,并给出了统一的近似表达式。在此基础上给出了单通道接收混合信号模型中小波变换幅度函数的近似表达式。通过充分利用与混合信号中奇异点有关的码元周期信息,给出一种基于小波变换的单通道接收条件下源信号数目估计算法,实现了在无先验知识的情况下对源信号数目的估计,并通过仿真验证了算法的可行性和有效性。
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| 关 键 词： | 源信号数目估计 小波变换 奇异点检测 |
| 收稿时间： | 2012/3/27 0:00:00 |
| 修稿时间： | 4/6/2012 4:35:12 PM |
Source Number Estimation Algorithm in Single Channel Blind Source Separation Using Wavelet Transform |
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| yinhaichang.Source Number Estimation Algorithm in Single Channel Blind Source Separation Using Wavelet Transform[J].Science Technology and Engineering,2012,12(20):5039-5043. |
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| Authors: | yinhaichang |
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| Institution: | 2(Guangdong Institute of Science and Technology1,Zhuhai 51909,P.R.China; Institute of Information Engineering2,Information Engineering University,Zhengzhou 450002,P.R.China) |
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| Abstract: | In this paper, the expression of amplitude of the wavelet transform of several digital modulated signals is derived, and the uniform approximate expression is given. And the approximate expression of amplitude of the wavelet transform in the single channel condition is also given. By using the information about symbol rate which is related to singular points in the received signal, a new single channel source number estimation algorithm is proposed based on the wavelet transform, without any prior knowledge. Finally, the simulation result proves feasibility and efficiency of this algorithm. |
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| Keywords: | source number estimation wavelet transform singular point detection |
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