Based on the analysis of active jamming mechanism, a method using the effective area and the incision area at a certain level of the ambiguity function is put forward to evaluate inherent anti-jamming capability of spread spectrum Tracking, Telemetry and Command (TT & C) signals. The smaller the corresponding areas are, the stronger the inherent anti-jamming capability is. Numerically simulation results of DS/FH TT & C signals show that the proposed metrics are effective to assess signals anti-jamming performance. The proposed methodology is reasonable and computable, and would provide reference for anti-jamming capability evaluation and spread spectrum TT & C signals design.%在分析有源干扰机理的基础上,提出以基于模糊图的有效面积和一定高度下切割面积评价扩频测控信号固有抗干扰性能的方法.模糊函数的相应面积越小,则信号抗干扰能力越强.对直扩/跳频(DS/FH)测控信号模糊函数进行了数值仿真,结果表明模糊图的有效面积和切割面积均可有效反映扩频测控信号固有抗干扰性能.该方法合理可计算,可为扩频测控信号的抗干扰性能评价及设计提供方法依据.
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