全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...
航空学报  2013 

基于周期FRFT的多分量LFMCW雷达信号分离

DOI: 10.7527/S1000-6893.2013.0145, PP. 846-854

Keywords: 分数阶Fourier变换,线性调频连续波,检测,信号分离,特征提取

Full-Text   Cite this paper   Add to My Lib

Abstract:

多分量线性调频连续波(LFMCW)信号的截获和特征提取是雷达情报侦察的难点,为了实现对多分量LFMCW信号的快速检测和有效分离,提出了一种基于周期分数阶Fourier变换(PFRFT)的多分量LFMCW雷达信号分离新方法。首先介绍了PFRFT,分析了PFRFT和FRFT之间的关系,讨论了LFMCW信号的PFRFT特征。然后给出了一种离散PFRFT的计算方法,结合周期分数阶Fourier域(PFRFD)的窄带滤波和CLEAN算法实现了多分量LFMCW信号的分离。仿真结果表明①PFRFT的计算效率较周期Wigner-Hough变换(PWHT)具有明显优势;②LFMCW信号分量在特定PFRFD中具有能量峰值,分离后能较好保留时频特征;③当两个LFMCW信号分量的功率相差较大时,适合在PFRFD分离,反之适合在时域分离;④当信噪比(SNR)为0dB时,两个具有相同功率的LFMCW信号分量分离后,与初始信号分量的相关系数都达到了0.9以上。

References

[1]  Muoz-Ferraras J, Perez-Martinez F, Burgos-Garcia M. Helicopter classification with a high resolution LFMCW radar. IEEE Transactions on Aerospace and Electronic Systems, 2009, 45(4): 1373-1384.
[2]  Gonzalez-Partida J T, Almorox-Gonzalez P, Burgos-Garcia M, et al. Through-the-wall surveillance with millimeter-wave LFMCW radars. IEEE Transactions on Geoscience and Remote Sensing, 2009, 47(6): 1796-1805.
[3]  Pace P E. Detecting and classifying low probability of intercept radar. 2rd ed. Massachusetts: Artech House, 2009: 31-37.
[4]  Barbarossa S. Analysis of multicomponent LFM signals by a combined Wigner-Hough transform. IEEE Transactions on Signal Processing, 1995, 43(6): 1511-1515.
[5]  Guo Q, Li Y J, Wang C H, et al. Novel detection method for multi-component LFM signals. First International Conference on Pervasive Computing Signal Processing and Applications, 2010: 759-762.
[6]  Liu F, Sun D P, Tao R, et al. Multi-component LFM signal feature extraction based on improved Wigner-Hough transform. 4th International Conference on Wireless Communications, Networking and Mobile Computing, 2008: 1-4.
[7]  Yuan Y, Fu Y, Li Q F. Detection and parameter estimation of multicomponent LFM signals based on Hilbert-Huang Hough transform. Asia-Pacific Conference on Computational Intelligence and Industrial Applications (PACIIA 2009), 2009(1): 476-479.
[8]  Cowell D M J, Freear S. Separation of overlapping linear frequency modulated (LFM) signals using the fractional Fourier transform. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 2010, 57(10): 2324-2333.
[9]  Qi L, Tao R, Zhou S Y, et al. Detection and parameter estimation of multicomponent LFM signals based on the fractional Fourier transform. Science in China Series F: Information Sciences, 2004, 47(2): 184-198.
[10]  Liu F, Xu H F, Sun D P, et al. Feature extraction of symmetrical triangular LFMCW signal using Wigner-Hough transform. Journal of Beijing Institute of Technology, 2009, 18(4): 478-483.
[11]  Liu F, Xu H F, Tao R. Detection and parameter estimation of symmetrical triangular LFMCW signal based on fractional Fourier transform. Journal of Electronics & Information Technology, 2011, 33(8): 1864-1870. (in Chinese) 刘锋, 徐会法, 陶然. 基于FRFT的对称三角线性调频连续波信号检测与参数估计. 电子与信息学报, 2011, 33(8): 1864-1870.
[12]  Millioz F, Davies M. Sparse detection in the chirplet transform: application to FMCW radar signals. IEEE Transactions on Signal Processing, 2012, 60(6): 2800- 2813.
[13]  Geroleo F G, Brandt-Pearce M. Detection and estimation of multi-pulse LFMCW radar signals. 2010 IEEE Radar Conference, 2010: 1009-1013.
[14]  Geroleo F G, Brandt-Pearce M. Detection and estimation of LFMCW radar signals. IEEE Transactions on Aerospace and Electronic Systems, 2012, 48(1): 405-418.
[15]  Wang Z Z. Interception and waveform recognition of a kind of continuous wave radars signals based on periodic WHT. Yantai: Naval Aeronautical Engineering Institute, 2012. (in Chinese) 王泽众. 基于周期WHT的一类连续波雷达信号截获与波形识别. 烟台: 海军航空工程学院, 2012.
[16]  Tao R, Deng B, Wang Y. Fractional Fourier transform and its applications. Beijing: Tsinghua University Press, 2009: 12-26. (in Chinese) 陶然, 邓兵, 王越. 分数阶傅里叶变换及其应用. 北京: 清华大学出版社, 2009: 12-26.
[17]  Liu F, Xu H F, Tao R, et al. Research on resolution among multi-component LFM signals in the fractional Fourier domain. Science China Information Sciences, 2012, 55(6): 1301-1312.
[18]  Deng B, Tao R, Qu C W. Analysis of the shading between multicomponent chirp signals in the fractional Fourier domain. Acta Electronica Sinica, 2007, 35(6): 1095-1098. (in Chinese) 邓兵, 陶然, 曲长文. 分数阶Fourier域中多分量chirp信号的遮蔽分析. 电子学报, 2007, 35(6): 1095-1098.
[19]  Bultheel A. A two-phase implementation of the fractional Fourier transform. Report TW 588, 2011: 1-11.
[20]  Zhao X H, Deng B, Tao R. Dimensional normalization in the digital computation of the fractional Fourier transform. Transactions of Beijing Institute of Technology, 2005, 25(4): 361-364. (in Chinese) 赵兴浩, 邓兵, 陶然. 分数阶傅立叶变换数值计算中的量纲归一化. 北京理工大学学报, 2005, 25(4): 361-364.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133