| 基于SNR估计的MQAM信号调制识别算法 |
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| 引用本文： | 张 启,王 军,陈 旭,陈超群. 基于SNR估计的MQAM信号调制识别算法[J]. 太赫兹科学与电子信息学报, 2014, 12(2): 218-222 |
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| 作者姓名： | 张 启 王 军 陈 旭 陈超群 |
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| 作者单位： | School of Electronic Engineering，University of Electronic Science and Technology of China，Chengdu Sichuan 611731，China;School of Electronic Engineering，University of Electronic Science and Technology of China，Chengdu Sichuan 611731，China;School of Electronic Engineering，University of Electronic Science and Technology of China，Chengdu Sichuan 611731，China;School of Communication and Information Engineering，University of Electronic Science and Technology of China，Chengdu Sichuan 611731，China |
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| 摘 要： | 针对现有多进制正交幅度调制(MQAM)信号调制方式的不足,提出了一种改进的MQAM信号调制识别算法。该算法对通信系统中信号的信噪比(SNR)进行估计,通过计算MQAM信号矢量图的最小环带的方差,得到不同调制类型的QAM最小环带的方差,最后根据估计的SNR与信号求出合适的参考门限,与之前求出的最小环带的方差进行比较,完成调制方式的识别。该算法运算量小,识别率高,且适用于实际工程应用。仿真结果表明在SNR≥-1?dB时,5种不同阶数的QAM信号的识别概率≥96%。
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| 关 键 词： | 调制识别 SNR估计 多进制正交幅度调制 最小环带 矢量图 |
| 收稿时间： | 2013-03-20 |
| 修稿时间： | 2013-05-05 |
MQAM signals modulation recognition algorithm based on SNR estimation |
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| ZHANG Qi,WANG Jun,CHEN Xu and CHEN Chao-qun. MQAM signals modulation recognition algorithm based on SNR estimation[J]. Journal of Terahertz Science and Electronic Information Technology, 2014, 12(2): 218-222 |
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| Authors: | ZHANG Qi WANG Jun CHEN Xu CHEN Chao-qun |
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| Affiliation: | ZHANG Qi;WANG Jun;CHEN Xu;CHEN Chao-qun;School of Electronic Engineering,University of Electronic Science and Technology of China;School of Communication and Information Engineering,University of Electronic Science and Technology of China; |
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