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FPGA-based chaff cloud radar echo real-time simulation method

A radar echo and real-time simulation technology, applied in the radar field, can solve the problems of poor mobility, large simulation resource consumption, and no consideration of chaff movement, etc., and achieve high efficiency, low resource consumption, and good portability.

Active Publication Date: 2021-03-30
XIDIAN UNIV
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  • Application Information

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Problems solved by technology

This patent generates chaff echo based on the echo coefficient of the chaff, without considering the actual movement of the chaff, and cannot accurately reflect the change of the radar echo when the chaff spreads in the air; in addition, the simulation resource consumption based on the computer platform is large , poor mobility

Method used

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  • FPGA-based chaff cloud radar echo real-time simulation method
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  • FPGA-based chaff cloud radar echo real-time simulation method

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Embodiment Construction

[0025] Embodiments and effects of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0026] refer to figure 1 , the specific implementation steps of the present invention are as follows:

[0027] Step 1. Calculate the initial attitude of the chaff, the initial Cartesian coordinates of each chaff, and the RCS value of each chaff.

[0028] These three calculation processes are independent of each other and independent of each other. They are calculated in parallel in the FPGA. The specific implementation is as follows:

[0029] 1.1) Calculate the initial attitude of the chaff: When calculating the initial attitude parameters, it is necessary to generate uniformly distributed random numbers and Gaussian distributed random numbers; this example uses the xorshiro128 algorithm to generate uniformly distributed random numbers in the range of (0,1), and the module name is rand (), use the Box-Muller algorithm to calculate...

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Abstract

The invention discloses an FPGA-based chaff cloud radar echo real-time simulation method and mainly aims to solve the problems of poor transportability of chaff cloud radar echo simulation and capability of only simulating single chaff cloud echoes in the prior art. The method is implemented by simulating operation on an FPGA platform and performing hardware optimization on a calculation process and comprises the following steps of: 1) calculating initial attitude, initial rectangular coordinate and radar scattering cross section value of each chaff; 2) calculating to obtain atmospheric density according to the height of each chaff; 3) calculating the displacement increment of each chaff within a sampling time point, and further calculating the rectangular coordinate of each chaff; 4) calculating the distance between each chaff and a radar according to the rectangular coordinate of the position of each chaff and radar coordinates, calculating the radar signal echo of each chaff cloud according to the distance and the radar scattering cross section value of each chaff, and completing the calculation of one time point; repeating the steps 2)-4) to obtain the echoes of the chaff clouds at different moments. The method is good in transportability and can be used for simulating radar echoes of multiple chaff clouds.

Description

technical field [0001] The invention belongs to the technical field of radar, and in particular relates to a method for real-time simulation of echoes of chaff clouds by radar, which can be used to obtain dynamic echoes of individual chaffs in chaff clouds at different times. Background technique [0002] Chaff cloud is the most widely used passive jamming, because it has the characteristics of long time in the air, large area of ​​action, and strong echo, it is widely used in air defense, anti-ship and other fields. The calculation of chaff cloud echo is mainly divided into three parts, which are chaff motion diffusion calculation, chaff radar scattering cross section calculation and chaff echo calculation. Its motion diffusion is related to the chaff throwing speed and throwing direction of the chaff release platform, the wind force, air density and viscosity of the environment where the chaff is located, and is one of the main factors affecting the radar echo characterist...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/40G01S7/38G01S7/41
CPCG01S7/4052G01S7/38G01S7/415G01S7/418Y02A90/10
Inventor 张民张树豪李金星江旺强魏鹏博聂丁
Owner XIDIAN UNIV
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