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| Modulation Identification of Digital Signals with Wavelet Transform |
| Chen Jian①; Kuo Yong-hong②; Li Jian-dong①; Ma Yu-bao② |
| ① National Key Lab. of ISN, Xidian University, Xi’an 710071, China; ②School of Telecommunication Engineering, Xidian University, Xi’an 710071, China |
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Abstract A new method of digital modulation identification with wavelet transform is introduced in this paper. There are two ways to get the characteristics. One is to get the local maximum with the continuous wavelet transform; the other is the multiresolution analysis. Both of them have been used. For different modulated signals, different characteristics have been used. Compared with others, the classifier is easy to realize and the decision is simple. It is not necessary to estimate the code period and the synchronization time. The percentage of correct identification is improved. The speed of modulation identification is increased as well.
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Received: 15 March 2005
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2006, Vol. 28 
