In order to evaluate anti-jamming performance of passive radar seeker ,anti-jamming performance indication system is built up according to the intricate disturbing circumstances on the sea .Relative importance indicators are deter-mined by the expert mark method based on self-confidence .Estimating matrix is given after analyzed the importance probabil-ity density function relationships ,and indicator weight is calculated after checkout estimating matrix coherence .Passive radar seeker active jamming indicator importance weight is calculated for example ,the result reflect the importance between indica-tors accurately ,preparing for evaluating anti-jamming performance .%为了评估被动雷达导引头的抗干扰性能，根据可能面临的海上复杂干扰环境建立了抗干扰指标体系，基于自信度的专家打分法确定指标之间相对重要性，分析相对重要性概率密度函数关系后确定判断矩阵，对判断矩阵进行一致性检验得到指标权重。以被动雷达导引头抗有源干扰指标的下层子指标为例进行了指标权重的计算，结果能准确地反映各个指标间的轻重关系，为评估抗干扰性能打下基础。
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