As an important part of anti-radiation missile,passive radar seeker plays a vital role in actual combat.Active jamming against passive radar seeker can be divided into active noise jamming and active decoy jamming.In this paper,the principles,characteristics and related technologies of the above two jamming methods were intro-duced,and the operational effectiveness evaluation index system of passive radar seeker under the condition of ac-tive jamming was established.By using fuzzy comprehensive evaluation method,the operational effectiveness evalu-ation method of passive radar seeker based on information entropy index weighting was studied.
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