摘要：In this paper, the output harmonics of jammer system is tested for deception of the velocity and range. Jammer system simultaneously steals the range and velocity gate. This output signal spectrum has two important characteristics. First, the central frequency shift is smaller and measurable than the central frequency of input signal. Second, the presence of harmonics with small amplitude being around the central frequency of the data shift. The main factor of the spectrum characteristics is the discrete nature of DRFM. We investigated the development of the states to predict the central frequency shift and harmonics location as a function of radar and DRFM parameters. When electronic war engineers could affect the system performance, these spectrum characteristics are taken attention. The analyzers of signal by these spectrum characteristics can evaluate electronic war systems better
