捷变频联合波形熵的密集假目标干扰抑制算法

doi:10.12305/j.issn.1001-506X.2021.06.07

Abstract

Abstract:

Dense false target jamming has the dual characteristics of deception and suppression, which seriously affects the effectiveness of radar operations. Therefore, a jamming suppression algorithm based on frequency agility and waveform entropy is proposed. Firstly, the Kittler algorithm is used for binarization. Secondly, the waveform entropy is used to identify the target and interference. Then, the local outlier detection algorithm is used to eliminate the data with strong interference side lobes in the target echo. Finally, the sparse reconstruction algorithm is used to perform interpulse coherent processing. The results of digital simulation experiment and field measured data processing verify the effectiveness of the proposed algorithm. The algorithm performance analysis results show that when the interference signal ratio is 58 dB, the proposed algorithm can still effectively suppress the interference and correctly detect the target.

Key words: dense false targets jamming, frequency agility, waveform entropy, local outlier factor detection

CLC Number:

TN957.52

Wen FANG, Yinghui QUAN, Minghui SHA, Zhixing LIU, Xia GAO, Mengdao XING. Dense false targets jamming suppression algorithm based on frequency agility and waveform entropy[J]. Systems Engineering and Electronics, 2021, 43(6): 1506-1514.

Figures/Tables 7

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References 25

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参数	取值	参数	取值
目标1距离/km	10.000	目标1速度/(m/s)	150
目标2距离/km	10.025	目标2速度/(m/s)	210
目标3距离/km	10.068	目标3速度/(m/s)	250
信号脉宽/μs	4	信号带宽/MHz	20
脉冲重复频率/kHz	25	脉冲数	64
起始载频/GHz	8	跳频间隔/MHz	8
跳频总数	128	采样率/MHz	40

参数	数值
脉冲宽度/μs	4
脉冲重复周期/μs	250
信号带宽/MHz	20
采样率/MHz	60
脉冲数	128
跳频总数	256
载频跳变范围/GHz	33.2~34.2

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Dense false targets jamming suppression algorithm based on frequency agility and waveform entropy

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