This paper introduces the composition and operation principle of the identification friend or foe (IFF) system,analyzes the difference and relation between IFF system and traditional primary radar,then brings forward a design method which combines IFF system and primary radar.%介绍了敌我识别(IFF)系统的组成和工作原理,分析了IFF系统和传统一次雷达的区别与联系,并提出了一种融合IFF系统与一次雷达的设计方法。
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