| 模拟数字通信信号调制识别研究 |
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| 引用本文： | 孟玲玲,刘春亮. 模拟数字通信信号调制识别研究[J]. 无线电通信技术, 2006, 32(5): 18-20,37 |
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| 作者姓名： | 孟玲玲 刘春亮 |
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| 作者单位： | 燕山大学信息科学与工程学院,河北,秦皇岛,066004 |
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| 摘 要： | 在符号变化的时刻,数字调制信号存在幅度、频率等变化的奇异点,而模拟调制信号却不然。利用2次小波变换检测奇异点的有无,提出了1种逼近相消算法来区分数字调制方式和模拟调制方式。通过对通信系统中常用的PSK、FSK、QAM、ASK、FM、AM信号调制方式的仿真,验证了此识别算法的有效性。
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| 关 键 词： | 调制识别 小波变换 中值滤波器 信噪比 |
| 文章编号： | 1003-3114（2006）05-18-3 |
| 收稿时间： | 2005-12-08 |
| 修稿时间： | 2005-12-08 |
Method of analog and digital communication signal modulation and identification |
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| MENG Ling-ling,LIU Chun-liang. Method of analog and digital communication signal modulation and identification[J]. Radio Communications Technology, 2006, 32(5): 18-20,37 |
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| Authors: | MENG Ling-ling LIU Chun-liang |
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| Affiliation: | The College of Information Science and Engineering, Yanshan University, Qinhuangdao Hebei 066004, China |
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| Abstract: | While the symbol changing,there are singularities with varying amplitude or frequency in digital modulation.We take advantage of wavelet transform twice to detect whether the singularities exist,and then put forward the approximation cancellation algorithm to distinguish digital modulation type and analog modulation type.The validity of the identification algorithm is verified through simulations of modulation types of PSK,FSK,QAM,ASK,FM,AM which are usually used in communication systems. |
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| Keywords: | modulation and identification wavelet transform median filter R_ SN |
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