Systems Engineering and Electronics ›› 2021, Vol. 43 ›› Issue (7): 1766-1774.doi: 10.12305/j.issn.1001-506X.2021.07.05

• Radar sparse signal processing technology • Previous Articles     Next Articles

Jamming suppression method for hyperbolic frequency modulated waveform based on sparse reconstruction

Yan ZHANG, Chunmao YE*, Yaobin LU, Xuebin CHEN   

  1. Beijing Institute of Radio Measurement, Beijing 100854, China
  • Received:2020-12-30 Online:2021-06-30 Published:2021-07-08
  • Contact: Chunmao YE

Abstract:

Hyperbolic frequency modulated (HFM) waveform has a significant advantage in long-distance high-speed target imaging due to the characteristic of Doppler invariance. However, nonlinear frequency modulation limits the application of HFM waveform in demodulated receiving system. At the same time, the imaging performance is degraded significantly under the interrupted sampling repeater jamming (ISRJ). Accordingly, on the basis of analyzing the characteristics of HFM wideband stretching echo, a jamming suppression method based on sparse reconstruction is proposed. Firstly, the HFM wideband stretching waveform model and time domain suppression model of ISRJ are derived. Then, specific sparse matrices are constructed and the algorithm is accelerated due to the sparse structure information of targets. Therefore, the proposed method can not only suppress jamming but also reconstruct focused images of multi-targets. Finally, electromagnetic simulation datas verify the effectiveness of the proposed method.

Key words: hyperbolic frequency modulated (HFM), sparse reconstruction, interrupted sampling repeater jamming (ISRJ)

CLC Number: 

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