强杂波背景下调频步进DBS技术研究

doi:10.12305/j.issn.1001-506X.2024.09.08

Abstract

Abstract:

To address the technical problems of target detection and identification of missile-borne radar in the background of strong ground clutter, we propose to combine the high resolution range profile (HRRP) technology and Doppler beam sharpening (DBS) technology to carry out two-dimensional high-resolution imaging of the ground to improve the performance of radar target detection and identification in the presence of clutter. The method uses the linear frequency modulation stepped frequency (LFM-SF) signal as the basic waveform. Firstly, the Doppler effect caused by the platform speed is discussed in detail and corrected. Then, HRRP sequences corresponding to each frame are obtained through distance profile extraction, and azimuth high resolution is achieved using fast Fourier transform (FFT). Finally, motion compensation is applied to the errors caused by the platform in actual flight conditions, completing the two-dimensional resolution of the area within the beam. The processing of measured data has verified the effectiveness and practicality of the proposed algorithm.

Key words: clutter, linear frequency modulation stepped frequency (LFM-SF), high resolution one-dimensional range profile, Doppler beam sharpening (DBS), motion compensation

CLC Number:

TN951

Kaixin ZHOU, Danyang LIU, Yongfeng ZHU, Yongjie ZHANG, Jianxiong ZHOU. Research on DBS technology of LFM-SF in strong clutter background[J]. Systems Engineering and Electronics, 2024, 46(9): 2960-2967.

Figures/Tables 10

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参数	数值
脉冲积累数N	64
脉冲带宽B_N/MHz	48
合成带宽B/MHz	500
脉冲重复周期T_r/μs	100
帧间间隔时间T/ms	500
平台估计速度v/(m/s)	1

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Research on DBS technology of LFM-SF in strong clutter background

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