| 一种基于小波的数字调制信号识别算法 |
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| 引用本文： | 高建勤,熊淑华,赵婧.一种基于小波的数字调制信号识别算法[J].四川大学学报(自然科学版),2007,44(6):1281-1284. |
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| 作者姓名： | 高建勤 熊淑华 赵婧 |
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| 作者单位： | 四川大学电子信息学院,成都,610064 |
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| 摘 要： | 小波包变换理论上可以实现信号频带的均匀划分，从而更好地提取信号的时频特征.作者首先介绍了卷积型小波包算法，然后分析了三种主要的数字调制信号的小波变换特征，提出了一种基于小波的数字调制信号识别算法，仿真结果表明该算法能够识别典型的数字调制信号，而且具有较好的抗噪声性能.
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| 关 键 词： | 小波包 数字信号 调制识别 |
| 文章编号： | 0490-6756（2007）06-1281-04 |
| 收稿时间： | 2006-06-28 |
| 修稿时间： | 2007-07-10 |
A wavelet-based identification algorithm of digital modulation signals |
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| GAO Jian-qin,XIONG Shu-hua and ZHAO Jing.A wavelet-based identification algorithm of digital modulation signals[J].Journal of Sichuan University (Natural Science Edition),2007,44(6):1281-1284. |
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| Authors: | GAO Jian-qin XIONG Shu-hua and ZHAO Jing |
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| Affiliation: | School of Electronics and Information Engineering, Sichuan University;School of Electronics and Information Engineering, Sichuan University;School of Electronics and Information Engineering, Sichuan University |
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| Abstract: | Wavelet packet transform can decompose the spectrum of signals into uniform sub-bands, thus it can extract the signal's time-frequency characteristics clearly. In this paper, convolution wavelet-packet algorithm is first introduced, then wavelet transform features of three main digital modulation signals are analyzed. Finally, a identification algorithm of digital modulation signals is put forward. Simulation results show that this algorithm is reasonable and has good noise performance. |
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| Keywords: | wavelet packet transform digital signal modulation identification |
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