A novel adaptive classification scheme for digital modulations in satellite communication

作     者：吴丹 Gu Xuemai Guo Qing 

作者机构：Communications Research Center Harbin Institute of Technology Harbin 150001 P.R.China t 

基　　金：国家高技术研究发展计划(863计划)(2004AA001210) 

出 版 物：《High Technology Letters》 (高技术通讯（英文版）)

年 卷 期：2007年第13卷第2期

页      码：145-149页

摘      要：To make the modulation classification system more suitable for signals in a wide range of signal to noise ratios （SNRs）, a novel adaptive modulation classification scheme is presented in this paper. Differ-ent from traditional schemes, the proposed scheme employs a new SNR estimation algorithm for small samples before modulation classification, which makes the modulation classifier work adaptively according to estimated SNRs. Furthermore, it uses three efficient features and support vector machines （SVM） in modulation classification. Computer simulation shows that the scheme can adaptively classify ten digital modulation types （i.e. 2ASK, 4ASK, 2FSK, 4FSK, 2PSK, 4PSK, 16QAM, TFM, π/4QPSK and OQPSK） at SNRS ranging from 0dB to 25dB and success rates are over 95% when SNR is not lower than 3dB. Accuracy, efficiency and simplicity of the proposed scheme are obviously improved, which make it more adaptive to engineering applications.

主 题 词：adaptive modulation classification support vector machine SNR estimation digital modulation 

学科分类：080904[080904] 0809[工学-计算机类] 08[工学] 0710[理学-生物科学类] 0831[工学-公安技术类] 0810[工学-土木类] 1205[管理学-图书情报与档案管理类] 0807[工学-电子信息类] 080402[080402] 0804[工学-材料学] 0805[工学-能源动力学] 0802[工学-机械学] 081001[081001] 0836[0836] 0811[工学-水利类] 0812[工学-测绘类] 0702[理学-物理学类] 

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