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Volume 20 Issue 4
Jul.  1998
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Liu Sheng, Xiang Jingcheng. RANGE SUPER-RESOLUTION AT LOW SNR VIA INTERPULSE FREQUENCY HOPPING AND SIGNAL ENHANCEMENT[J]. Journal of Electronics & Information Technology, 1998, 20(4): 445-452.
Citation: Liu Sheng, Xiang Jingcheng. RANGE SUPER-RESOLUTION AT LOW SNR VIA INTERPULSE FREQUENCY HOPPING AND SIGNAL ENHANCEMENT[J]. Journal of Electronics & Information Technology, 1998, 20(4): 445-452.

RANGE SUPER-RESOLUTION AT LOW SNR VIA INTERPULSE FREQUENCY HOPPING AND SIGNAL ENHANCEMENT

  • Received Date: 1997-05-19
  • Rev Recd Date: 1997-10-29
  • Publish Date: 1998-07-19
  • For linear and non-linear frequency modulation (LFM/NLFM) signals with large time-bandwidth product (TB),radar super-resolution in range domain at low SNR is investigated.A novel signal enhancement algorithm based on FFT for LFM/NLFM signals used for preprocessing,which significantly raises the effective signal-to-noise ratio(SNR),is presented.By use of decorrelation between echoes of different targets achieved by pulse-to-pulse carrier frequency hopping,a vvariety of approaches are suggested to further lower the SNR threshold for range super-resolution.Monte-Carlo simulation results are presented to illustrate the inproved performance.
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  • 林茂庸,柯有安.雷达信号理论.北京:国防工业出版社.1984,115-151.[2]Krim H, Viberg M. Two decades of array signal processing research. IEEE SP Mag. 1996, 13(4), 67-94.[3]Bruckstein A M, et al. The resolution of overlapping echoes. IEEE Trans. on ASSP, 1985, ASSP-33(6): 1357-1367.[4]Gabriel W F. Superresolution techniques and ISAR imaging. IEEE National Radar Conf,Dallas, Texas: 1989, 48-55.[5]Gabriel W F. Superresolution techniques in range domain. IEEE Int. Radar Conf., Arlington, Virginia: 1990, 263-267.[6]Abatzoglou T J. Superresolution signal processing and its application. Proc. of SPIE, 1995, Vo1.2562,88-98.[7]Cadzow J A. Signal enhancement--A composite property mapping algorithm. IEEE Trans. on ASSP,1988,ASSP-36(1): 49-62.[8]Vax M, Kailath T. Determining the number of signals by information theoretic criteria. IEEE Trans. on ASSP, 1985, ASSP-33(2): 387-392.[9]Karhunen J T, Joutsensalo J. Sinusoidal frequency estimation by signal subspace approximation. IEEE Trans. on SP, 1992, SP-40(12): 2961-2972.[10]Johnson J A, Fairhead A C. Waveform design and Doppler sensitivity analysis for nonlinear FM chirp pulses. IEE Proc-F, 1986, 133(2): 163-175.
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