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Acta Armamentarii ›› 2013, Vol. 34 ›› Issue (1): 76-81.doi: 10.3969/j.issn.1000-1093.2013.01.014

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Reconstruction and Extraction Methods for Micro-Doppler Feature of Ballistic Missile Precession with Sparse Frequency-stepped Chirp Signal

  

  1. 1. Institute of Information and Navigation, Air Force Engineering University, Xi’an 710077，Shaanxi, China; 2. Unit 93508 of PLA, Beijing 100079, China; 3. Institute of Air and Defense, Air Force Engineering University, Xian 710051，Shaanxi, China; 4. Institute of Science, Air Force Engineering University, Xi’an 710051, Shaanxi, China; 5. Unit 95947 of PLA, Chengdu 610081, Sichuan, China
  • Online:2013-07-22

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Abstract:

Some microDoppler features of ballistic missile precession with frequencystepped chirp signal (FSCS) were analyzed theoretically. Combined with compressed sensing (CS) theory, a new method of microDoppler spectrum reconstruction method based on sparse FSCS was proposed. The spectrum information can be reconstructed exactly, in obviously reduced subpulses of FSCS, and the sidelobes of spectrum can be effectively suppressed. Furthermore, aimed at the reconstructed spectrum, a new extraction method for microDoppler features of ballistic missile precession was proposed on the basis of dynamic planning, by using the smooth character of microDoppler curves. The effectiveness and robustness of the method was validated numerically.

Key words: information processing, frequency-stepped chirp signal, compressed sensing, ballistic missile precession, micro-Doppler, dynamic planning