Networked radar system deceptive jamming resisting method

Abstract

The invention discloses a networked radar system deceptive jamming resisting method. The method comprises the following steps of (1) for n node radars, obtaining distance units corresponding to P point targets according to detection, and obtaining the slow time random complex envelope sequence Aipi of each point target; (2) estimating the correlation coefficient between the slow time random complex envelope sequence Aipi of the pith the point target detected by the ith node radar and the slow time random complex envelope sequence Ajpj of the pjth target detected by the jth node radar; (3) setting the real part of the correlation coefficient as correlation measure mupi,pj according to the correlation coefficient rhopi,pj; (4) estimating the target noise ratio (TNR) corresponding to the slow time random complex envelope sequence Aipi and the Ajpj, obtaining a correlation measure mupi,pj, and selecting a check threshold sigmapi,pj according to the expectation value phipi,pj of the check threshold sigmapi,pj; (5) carrying out an active false target correlation test on any two point targets according to the check threshold sigmapi,pj; (6) testing each target in the ith node radar and the jth node radar in a traversal mode, removing active false targets, and thereby achieving the purpose of deceptive jamming resistance.

Description

technical field [0001] The invention relates to the field of radar technology, in particular to data fusion anti-jamming technology, in particular to a networked radar system anti-spoofing jamming method. Background technique [0002] Active jamming can be divided into suppressive jamming and deceptive jamming. Suppressive jamming mainly covers or submerges target echo signals by emitting high-power noise or noise-like jamming signals to prevent radar from detecting target information. Deceptive jamming generates a large number of deceptive false targets near the real target by storing, modulating and forwarding the intercepted radar signal to interfere and confuse the radar detection system and tracking system. Compared with suppressive jamming, the pulse compression gain of the receiver can be used to complete the effective jamming of the radar with less power, so the jamming efficiency is higher, and it has received extensive attention. In particular, digital radio freq...

AI Technical Summary

Problems solved by technology

However, since each node radar in the networked radar will be subject to deceptive interference, dense false targets will lead to a high error rate in the correlation test between the measured values ​​of each node radar, and the location of the networked radar station is not ideal, and the It will affect the ability of networked radars to resist deceptive jamming

[0004] Existing networked radars use data-level fusion to counteract deceptive jamming. In the process of measuring targets, only the point track information or track information of the target is used, but other information is not effectively used. Therefore, , the data-level fusion anti-jamming method cannot fully exert its anti-jamming ability, and cannot make full use of the advantages of radar networking

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