基于分层极化特性的箔条云识别方法

doi:10.12305/j.issn.1001-506X.2021.08.10

Abstract

Abstract:

As a typical passive jamming method, chaff movement in the air and its distribution orientation are complex and changeable, with uncertainties. Its radar characteristics are quite complicated, even the advanced synthetic aperture radar (SAR) seeker is difficult to deal with. Under this situation, a chaff clouds interference recognition method from the polarization characteristics and aerodynamic characteristics of chaff clouds is proposed. The unique layered polarization characteristics of chaff clouds can be used to recognize the chaff jamming. The height dimension information of the target is obtained by using the interference principle, and the feature recognition quantity ρ is used to measure the polarization difference between the chaff clouds and the ship target. The application scope of the proposed method is also discussed. Theoretical analysis and simulation results verify the feasibility of the proposed method.

Key words: polarization, chaff clouds, target recognition, synthetic aperture radar (SAR) seeker

CLC Number:

TN95

Yongzhen LI, Yemin LIU, Chen PANG, Datong HUANG. Chaff clouds recognition method based on layered polarization characteristics[J]. Systems Engineering and Electronics, 2021, 43(8): 2099-2107.

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References 19

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参数	取值
平台速度v_a/(m·s^-1)	400
信号载频f_c/GHz	35
信号带宽B/MHz	150
信号脉宽T_p/μs	2
最近斜距R₀/km	1.13
方位向波束宽度θ_H/(°)	0.86
脉冲重复频率P_rf/Hz	150
平台高度H/km	8
斜视角θ_s/(°)	45
基线长度B/m	1

箔条分布类型	ρ值
情况1	0.9
情况2, θ₀=40°	0.8
情况3, θ_g=45°, σ=20°	0.8

箔条分布类型	ρ值
情况1	0.8
情况2, θ₀=40°	0.8
情况3, θ_g=45°, σ=20°	0.7

箔条分布类型	ρ值
情况1	0.8
情况2, θ₀=40°	0.7
情况3, θ_g=45°, σ=20°	0.7

船只目标	ρ值
γ_s=45°, φ_s=0°	0.2
γ_s=45°, φ_s=30°	0.4
γ_s=45°, φ_s=45°	0.3
γ_s=45°, φ_s=60°	0.5

Chaff clouds recognition method based on layered polarization characteristics

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