基于穿越时刻的前向散射雷达网目标参数估计

doi:10.12305/j.issn.1001-506X.2023.05.08

Abstract

Abstract:

The passive radar based on global navigation satellite system (GNSS) is a hot spot in the current radar field. Firstly, a forward scatter radar (FSR) net model with GNSS as the radiation source is proposed. The estimation technique of the kinematic parameters of a moving target using only the time of target crossing baselines is realized, and the minimum network configuration is proved theoretically. Then, the accuracy of parameter estimation is derived, and the influence of crossing time error, station location error, transmitting/receiver layout, and target height on the accuracy of target parameter estimation are analyzed by simulation. The simulation results show that considering the actual parameter measurement error and station location error conditions, the target position estimation error can reach the order of 100 meters, which can meet the early warning requirements. The obtained conclusions can provide a reference for the construction of the FSR net in the mode of sky transmitting and earth receiving.

Key words: forward scatter radar (FSR), parameter estimation, crossing time, error analysis

CLC Number:

TN957

Yuqing ZHENG, Xiaofeng AI, Zhiming XU, Feng ZHAO, Yong YANG. Target parameters estimation of FSR net based on crossing times[J]. Systems Engineering and Electronics, 2023, 45(5): 1323-1332.

Figures/Tables 12

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References 30

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对象	参数	取值
目标	飞行轨迹/km	y=0.2x+7
	初始高度/km	7
	速度/(m/s)	250
接收站	R₁/km	(0, 0.01)
	R₂/km	(0.5, 0.005)
	R₃/km	(1.0, 0.01)
	R₄/km	(1.5, 0.01)
	R₅/km	(2.0, 0.01)
发射站	T₁/km	(0, 20 200)
	T₂/km	(100, 20 200)
	T₃/km	(200, 20 200)
	T₄/km	(300, 20 200)

基线数量/条	系统结构
4	两发两收(T₁, T₂)-(R₁, R₂)
6	两发三收(T₁, T₂)-(R₁, R₂, R₃)
8	两发四收(T₁, T₂)-(R₁, R₂, R₃, R₄)
10	两发五收(T₁, T₂)-(R₁, R₂, R₃, R₄, R₅)

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Target parameters estimation of FSR net based on crossing times

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