正交基带通信信号的调制方式盲识别

doi:10.3778/j.issn.1002-8331.2010.35.040

计算机工程与应用 ›› 2010, Vol. 46 ›› Issue (35): 139-141.DOI: 10.3778/j.issn.1002-8331.2010.35.040

• 数据库、信号与信息处理 • 上一篇下一篇

正交基带通信信号的调制方式盲识别

刘芳¹，彭玉华¹，张顺利¹，许建华²，张超²

1.山东大学信息科学与工程学院，济南 250100
2.电子测试技术国家重点实验室，山东青岛 266555

收稿日期:2009-04-13 修回日期:2009-06-01 出版日期:2010-12-11 发布日期:2010-12-11
通讯作者: 刘芳

Blind modulation recognition of quadrature communication signals on baseband

LIU Fang¹，PENG Yu-hua¹，ZHANG Shun-li1，XU Jian-hua2，ZHANG Chao2

1.Department of Information and Science Technology，Shandong University，Jinan 250100，China
2.The State Key Laboratory of Electronic Measurement Technology，Qingdao，Shandong 266555，China

Received:2009-04-13 Revised:2009-06-01 Online:2010-12-11 Published:2010-12-11
Contact: LIU Fang

摘要/Abstract

摘要： 基于基带信号频率低，算法计算量小的优点，提出了一种在不需信号先验知识的情况下识别基带正交调制信号的方案。该方案利用接收信号的基带谱特性和统计特性，从中提取抗噪声，且对频偏和相偏不敏感的特征，对信号进行模拟数字的联合自动识别。对真实采集信号进行实验验证，结果表明：在信噪比不小于7 dB时，对数字和模拟调制方式都未知的信号，算法可以得到95%以上的正确识别率。

关键词: 调制盲识别, 基带特征参数提取, 通信信号

Abstract: A recognition method of quadrature modulated signals on baseband is presented.Compared with conventional methods operated in mid-frequency，the computational complexity of this method is reduced for its lower frequency property.By extracting robust features from the received signals’ spectrum and statistical characteristics，it can classify the signals automatically without prior knowledge whether the signal modulation group is analogue or digital.These features perform well under a low SNR circumstance and are insensitive to frequency offset and phase offset.The performance of this algorithm is verified by some real data，and experiment results show that its overall recognition rate can exceed 95% when SNR is above 7 dB.

Key words: blind modulation recognition, baseband feature extraction, communication signal

中图分类号:

TN911.7

刘芳¹，彭玉华¹，张顺利¹，许建华²，张超². 正交基带通信信号的调制方式盲识别[J]. 计算机工程与应用, 2010, 46(35): 139-141.

LIU Fang¹，PENG Yu-hua¹，ZHANG Shun-li1，XU Jian-hua2，ZHANG Chao2. Blind modulation recognition of quadrature communication signals on baseband[J]. Computer Engineering and Applications, 2010, 46(35): 139-141.

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正交基带通信信号的调制方式盲识别

Blind modulation recognition of quadrature communication signals on baseband

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