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针对传统方法对DS/FH(直接序列扩频/跳频扩频)系统的综合性能测试不够全面有效的问题,提出通过最低性能指标约束法对系统抗干扰性能进行综合分析。以音调干扰、窄带噪声和脉冲干扰3种典型干扰为例,探讨了这3种干扰在不同参数条件下对最低性能指标的影响。并且进一步分析了动态条件下多普勒频偏对DS/FH系统捕获性能的影响。为便于对系统的综合性能进行定量分析,给出最低性能指标约束下的系统综合性能评价指标。最后通过实例分析说明了系统综合性能评估方法的正确性与有效性,该方法对DS/FH这一复杂系统的测试具有指导意义。
Aiming at the problem that the traditional method is not comprehensive and effective for the comprehensive performance test of DS / FH (Direct Sequence Spread Spectrum / Frequency Hopping Spread Spectrum) system, a comprehensive analysis of anti-jamming performance of the system is proposed based on the minimum performance index constraint method. Taking the typical interference of pitch interference, narrowband noise and impulsive interference as examples, the influences of these three kinds of interference on the lowest performance index under different parameters are discussed. The influence of Doppler frequency offset on the acquisition performance of DS / FH system is further analyzed. In order to facilitate the quantitative analysis of the comprehensive performance of the system, the comprehensive performance evaluation index under the constraints of the lowest performance index is given. At last, the correctness and validity of the system performance evaluation method are illustrated by examples. This method is instructive for the testing of DS / FH, a complex system.