Systems Engineering and Electronics ›› 2023, Vol. 45 ›› Issue (7): 2031-2042.doi: 10.12305/j.issn.1001-506X.2023.07.13

• Sensors and Signal Processing • Previous Articles     Next Articles

Multi-waveform adaptive pulse compression for range sampling mismatch

Jiazheng PEI1,2, Yong HUANG1,*, Baoxin CHEN3, Jian GUAN1, Xiaolong CHEN1   

  1. 1. Naval Aviation University, Yantai 264001, China
    2. Academy of Military Science, Beijing 100091, China
    3. Uint 92337 of the PLA, Dalian 116000, China
  • Received:2021-11-25 Online:2023-06-30 Published:2023-07-11
  • Contact: Yong HUANG

Abstract:

Aiming at the phase mismatch between echo waveform and reference signal waveform and the degradation of adaptive pulse compression method's performance when the mismatch between echo sampling point of frequency modulation (FM) signal echo in a range cell is mismatched with the target point (i.e., range sampling mismatch), a multi-waveform adaptive pulse compression (MWAPC) method for range sampling mismatch is proposed. The algorithm applies the multistatic adaptive pulse compression (MAPC) method to the monostatic radar. Firstly, the original transmitted signal of the monostatic radar is oversampled to obtain multiple sampled versions of the transmitted signal, and various sampled versions are regarded as different waveforms. Then with the help of the sensitivity of adaptive pulse compression to phase mismatch, the different sampled versions of the transmitted signal are utilized to perform multi-waveform adaptive pulse compression on the echo signal, and the two-dimensional output of range dimension and sampling dimension is constructed to obtain the relative position relationship between target point and echo sampling point in a range cell can be obtained. Experiments show that the proposed algorithm can extend the two-dimensional output of adaptive pulse compression into one-dimensional according to the sampling order of the multiple sampling versions. Compared with the conventional pulse compression method, the proposed method not only suppress the range sidelobes caused by range sampling mismatch, but also obtain the resolution which beyond the traditional pulse compression methods to distinguish different targets in the same range cell.

Key words: frequency modulation (FM) signal, sampling mismatch, oversampling, adaptive pulse compression (APC), radar imaging, range sidelobes suppression

CLC Number: 

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