| 非AWGN环境下调制类型自动识别 |
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| 引用本文： | 谭文芬,陈启兴.非AWGN环境下调制类型自动识别[J].现代电子技术,2003,26(18):18-21. |
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| 作者姓名： | 谭文芬 陈启兴 |
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| 作者单位： | 1. 西南交通大学,应用数学系,四川,成都,610031
2. 西南交通大学,移动通信研究所,四川,成都,610031 |
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| 摘 要： | 在非AWGN环境下，针对CW，AM，FM，OOK，PSK，QPSK，16QAM，FSK，MSK，SSB十种混合调制信号，对调制类型特征提取方法和自动识别算法进行了分析、综合、设计和计算机仿真。提出了梯层电平分析方法、频率瞬时信号分析、剔除载波的归一化能量分析、平方后信号的频谱分析、四次方后的信号频谱分析等方法。当SNR=10dB时，计算机仿真结果是正确识别率不低于95％，自动识别的平均处理时间为不超过10s。
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| 关 键 词： | 非AWGN环境 调制类型 特征提取 自动识别 信号频谱分析 混合调制信号 |
| 文章编号： | 1004-373X(2003)18-018-04 |
| 修稿时间： | 2003年6月10日 |
Automatic Recognition of Modulation Schemes Under Non-AWGN Channel |
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| TAN Wenfen ,CHEN Qixing.Automatic Recognition of Modulation Schemes Under Non-AWGN Channel[J].Modern Electronic Technique,2003,26(18):18-21. |
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| Authors: | TAN Wenfen CHEN Qixing |
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| Institution: | TAN Wenfen 1,CHEN Qixing 2 |
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| Abstract: | Under nonAWGN channel, aimed at CW, AM, FM, OOK, PSK, QPSK, 16QAM, FSK, MSK, SSB, the methods of characteristic extraction and the algorithm of automatic recognition of modulation schemes has been analyzed, synthesized, designed and simulation. A few methods have been proposed,such as stepped voltage level analysis, normalized carrierfree spectral energy analysis, squared signal and fourth powered signal analysis, etc.When SNR is equal to 10 dB, it is shown from simulation that, the correct recognition rate is not lower than 95% and the average recognition time is not more than 10 s. |
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| Keywords: | non-AWGN channel characteristic extraction modulation schemes algorithm of automatic recognition of modulation schemes decision theory |
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