双基地机载雷达杂波和主瓣压制干扰抑制方法

doi:10.12305/j.issn.1001-506X.2023.03.10

Abstract

Abstract:

When the jamming enters from the main-lobe of the beam, the traditional spatial anti-jamming method not only cannot suppress the main-lobe jamming, but also causes the problem of main-lobe distortion and side-lobe elevation, which seriously affects the target detection performance of airborne radar. Aiming at this problem, an airborne radar clutter and main-lobe suppression jamming suppression method based on bistatic configuration is proposed. This method firstly forms multiple adjacent spatial beams for the primary and auxiliary radars respectively, then performs pulse Doppler (PD) processing on the beamformed data, and matches the jamming signals of the primary and auxiliary radars in the range-Doppler domain. On this basis, the Doppler channels corresponding to the primary and auxiliary radars are used to suppress the jamming through time-domain adaptive filtering. Finally, the data of adjacent beams are combined to suppress the residual clutter through reduced-dimension space-time adaptive processing (STAP). The simulation results show that the proposed method can effectively suppress the clutter and main-lobe jamming. Compared with the traditional sample matrix inversion (SMI) method and the joint domain localized (JDL) method, the signal to interference plus noise ratio performance is improved by about 20.6 dB and 21.5 dB respectively.

Key words: bistatic airborne radar, main-lobe suppression jamming, clutter suppression, jamming matching

CLC Number:

TN957

An'an WANG, Wenchong XIE, Wei CHEN, Yuanyi XIONG, Yongliang WANG. Clutter and main-lobe suppression jamming suppression method for bistatic airborne radar[J]. Systems Engineering and Electronics, 2023, 45(3): 699-707.

Figures/Tables 12

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References 30

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物理量	取值
行阵元数M/个	12
列阵元数N/个	16
脉冲数K/个	16
脉冲重复频率f_r/Hz	700
波长λ/m	0.4
阵元间距d/m	0.2
发射峰值功率/kw	200
脉冲宽度τ/μs	15
接收机带宽B/MHz	5

步骤	方法
步骤	JDL	JMBMC-STAP	SMI
降维处理	N′K′K_dL(8NK－2)	2N′K′K_dL(8NK－2)	-
空域波束形成	NK_dL(8NK－2)	2NK_dL(8NK－2)	-
多普勒滤波	K′K_dL(8K－2)	2NK_dL(8NK－2)	-
干扰配对	-	3N－1+K_d(L+1)(5N－2)	-
干扰对消	-	4NK_d+N(16L－18)	-
STAP	K_dL[P′³+8P′²－2P′]+ 16P′³K_dL+K_dL(8P′－2)	K_dL[P′³+8P′²－2P′]+ 16P′³K_dL+K_dL(8P′－2)	K_dL[P³+8P²－2P]+ 16P³L+K_dL(8P－2)
合计	2.664 7×10¹¹	3.229 1×10¹¹	1.499 1×10¹³

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Clutter and main-lobe suppression jamming suppression method for bistatic airborne radar

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