期刊文献+

基于小波分解的OFDM与单载波信号识别 被引量:4

Recognition of OFDM and Single Carrier Digital Signals Based on Wavelet Decomposition
下载PDF
导出
摘要 针对多径信道下OFDM信号的识别问题,提出了一种基于小波分解获得细节特征的信号识别方法。由于不同调制方式信号的细节分量在同一分解水平下存在较大差异,而细节分量几乎包含了信号的全部细节信息,从而直接反应信号的变化情况。通过理论推导和仿真测试证明单载波和OFDM信号在进行多层小波分解后,每层对应细节分量的幅度值具有不同的变化,然后利用其幅度差作为特征参数,并基于最近邻法判决规则实现单载波信号和OFDM信号的有效识别。仿真结果证实了该方法在较低信噪比下识别的正确性和可行性。 Aiming at the problem of modulation recognition in OFDM signals under multi-path channel, a new algorithm based on wavelet decomposition geting detail feature is proposed. According to the different signal types have different detail component in the same decomposition level, the detail component of signals can be separated after the wavelet decomposition of signals. Because detail component contains almost all the signal's detail information, the detail information can directly reflect the change of different signal types. The theory and simulation demonstrate that the amplitude values corresponding to detail component change differently after OFDM signals and single carrier digital signals making wavelet decomposition. Then the amplitude difference is regarded as a feature value, and the rule of Nearest Neighbor is used to recognize of OFDM signals and single carrier digital signals. Computer simulation results show that the feature value is immune to multi-path channel, and the algorithm is both feasibility and correctness in low SNR environment.
出处 《电视技术》 北大核心 2013年第1期133-136,共4页 Video Engineering
基金 河北省自然科学基金项目(F2009000224)
关键词 小波分解 细节特征 OFDM信号 wavelet decomposition detail features OFDM signal
  • 相关文献

参考文献7

二级参考文献37

  • 1张文红,韩刚,李建东.基于支撑矢量机的通信信号调制识别方法研究[J].通信技术,2003,36(2):12-14. 被引量:4
  • 2王兵,羿旭明.一种提取小波脊线的迭代算法[J].数学杂志,2005,25(3):295-298. 被引量:12
  • 3朱洪俊,王忠,秦树人.小波变换对瞬态信号特征信息的精确提取[J].机械工程学报,2005,41(12):196-199. 被引量:11
  • 4吕挺岑,李兵兵,董刚.一种多径信道下的OFDM信号盲识别算法[J].现代电子技术,2007,30(11):13-16. 被引量:15
  • 5Hong Li, Yeheskel Bar-Ness, Ali Abdi, Oren S. Somekh, and Wei Su. OFDM Modulation Classification and Parameters Extraction [ C ]//International Conference on Cognitive Radio Oriented Wireless Networks and Communications, Piscataway, N J, USA : IEEE Press, 2006, 1-6.
  • 6NalanO, F Acar S. Determination of Wavelet Ridges of Nonstationary Signals by Singular Value Decomposition [J]. IEEE Transaction on Circuits and Systems-II: Express Briefs, 2005,25 ( 8 ) :480-485.
  • 7StephaneMallat著.杨力华,戴道清,黄文良,湛秋辉译.信号处理的小波引导[M].第二版.北京:机械工业出版社.2002.70-80.
  • 8Nalan Ozkurt, F. Aear Savaei. Determination of Wavelet Ridges of Nonstationary Signals by Singular Value Decomposition [ J]. IEEE Trans On Circuits and Systems II: Express Briefs, 2005, 52(8) :480-485.
  • 9AZZOUZ E E,NANDI A K.通信信号调制的自动识别[M].俞仁涛,李武皋,译.上海:中国人民解放军57394部队.1998.
  • 10PUNCHIHEWA A,DOBRE O A,RAJAN S,et al.Cyclostationaritybasedalgorithm for blind recognition of OFDM and single carrier linear digitalmodulations[C]//Proc.The 18th Annual IEEE International Symposiumon Personal,Indoor and Mobile Radio Communications.[S.l.]:IEEEPress,2007:1-5.

共引文献49

同被引文献43

  • 1徐立清,葛临东.一种多径环境下的调制识别算法[J].电子技术应用,2005,31(9):14-16. 被引量:3
  • 2廖红舒,魏平.多径衰落信道下MQAM信号的调制识别[J].电子技术应用,2006,32(10):138-140. 被引量:2
  • 3吕挺岑,李兵兵,董刚.一种多径信道下的OFDM信号盲识别算法[J].现代电子技术,2007,30(11):13-16. 被引量:15
  • 4王彬,葛临东,徐立清.一种多径信道中的调制识别算法[J].数据采集与处理,2007,22(4):440-446. 被引量:6
  • 5姚亚峰,黄载禄.通信信号调制识别技术[J].通信技术,2003(6):41-43.
  • 6Wang Y perform downlink S, Huang C C. On the arch itccture and ance of an FFT-based spread-specturn Rake receiver[J]. IEEE Transactions On Vehicular Technology,2001,50(1): 234-243.
  • 7Tong L, Xu G, Kailath T. Blind Channel Identi- fication and Equalization Using Second-Order Sta- tistics:A Time-Domain Approach[J].IEEE Trans.on Information Theory, 1994,40(2): 340-349.
  • 8Moulines E, Duhamel P, Duhamel P, et al Subspace Metheds for the Blind Identification of Multichannel FIR Filters[J].IEEE TR.On SP, 1995,43 (2):516-525.
  • 9Abed-Meraim K.Prediction error methods for time-domain blind identification of multichannel FIR filters[J]. Proceedings of ICASSP,1995: 1968-1971.
  • 10Farid A A,Luo Z,Ding Z.Blind Channel Equaliza- tion Based on Second Order Statistics[J]. Acostics, Speech and Signal Processing,2005(3):557-567.

引证文献4

二级引证文献10

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部