| 摘要: |
| 针对卫星数字混合信号的特征,提出了在载波速率和符号速率初判基础上的自动识别方案.该方案利用数字混合信号与常用数字调制信号在信号频谱以及星座点的差异提取特征参数进行自动识别.仿真结果表明,该方案具备实用性和可行性. |
| 关键词: 卫星通信 调制识别 谱特征 聚类 星座图 |
| DOI：10.3969/j.issn.1001-893X. |
| Received:March 12, 2006Revised:July 03, 2006 |
| 基金项目: |
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| Automatic Modulation Recognition of Digital Mixed Signals in Satellite Communication Systems |
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| Abstract: |
| According to the features of digital mixed signals in a satellite communication systems, a recognition scheme is proposed based on preestimation of carrier frequency and symbol frequency. In the scheme, a set of feature parameters are extracted from signal spectrum and constellation based on the differences between digital mixed signals and common digital modulation signals. The simulations indicate that the scheme is feasible and practical. |
| Key words: satellite communication modulation recognition spectrum feature clustering constellation |
