A Radiation Source Correlation Method for Active-Passive Radar Coordination
An active radar and radiation source technology, applied in the field of radiation source correlation, can solve the problems of divergent tracking effect and large positioning result error.
Active Publication Date: 2020-07-10
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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In this system, since the active radar can detect the number of targets, and the passive radar detects the radiation source information, the process of target location and tracking needs to know which active radar the radiation source information received by the passive radar is in a group with, otherwise it will The error of the positioning result is large, and the tracking effect is divergent.
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[0028] Suppose there are 8 targets, two multi-radiation source ships each carry 2 radiation sources, and 6 single-radiation source ships each carry a radiation source. The coordinates of the 8 targets are [200,(i-1)*R ,0], i=1,2,...,8, the unit is Km, where R is the distance between ships. It is assumed that i=2,8 is a multi-radiation source ship (carrying 2 radiation sources, and the distance between radiation sources is 50m). The coordinates of the three receiving stations are s 1 =[0,0,30],s 2 =[25,43,30],s 3 =[25,-43,30], the unit is Km, and the self-positioning error of the three receiving stations is 50m. The speed at three stops is v 1 =[1020,0,0],v 2 =[1020,0,0],v 3 =[1020,0,0], unit m / s. The number of simulations is 5000 times.
[0029] Match by time difference only. Assume that the time difference measurement error is 50ns, and the coordinate distance between ships is R=1, 2, 5, 10km. u 1 ~ u 8 is the radiation source on the 1st to 8th targets, u 9 , u ...
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The invention belongs to the technical field of radar signal processing in particular to a radiation source correlation method under active and passive radar coordination. The radiation source correlation method mainly comprises: Through the active radar, the initial locator value Uiis measured; The passive radar obtains the radiation source time-frequency difference information Tauiand f ithrough time-frequency two-dimensional correlation; According to the initial locator value Uimeasured by the active radar, the estimated time-frequency difference value at the target is obtained; As for the received time-frequency difference value of the radiation source, the estimated time-frequency difference value between and f closest to is considered that the radiation source is located on the itarget. The radiation source correlation method under the active and passive radar coordination has the advantages of effectively resolving the problem of information matching between the active radar and the passive radar under the active and passive radar coordination detection system as well as finding the corresponding objects in the radiation source when the target is equipped with multiple radiation sources.
Description
technical field [0001] The invention belongs to the technical field of radar signal processing, and in particular relates to a method for associating radiation sources under the cooperation of active and passive radars. Background technique [0002] Active radar itself radiates electromagnetic waves to detect targets, but it is easy to be detected. Passive radar itself does not radiate electromagnetic waves, but its positioning effect is worse than that of active radar. Therefore, the detection system of active and passive radar cooperative positioning and tracking has attracted more and more attention. In this system, since the active radar can detect the number of targets, while the passive radar detects the radiation source information, the process of target location and tracking needs to know which active radar the radiation source information received by the passive radar is in a group with, otherwise it will As a result, the error of the positioning result is relativel...
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IPC IPC(8): G01S7/02
CPCG01S7/02
Inventor 李万春唐遒彭丽陈锐滨
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA