Design of Integrated Stealth Measure for Radar Waveform Stealth Performance

Abstract

Stealth measure is a key index to measure radar signal stealth capability. However, current radar signal stealth measure is mostly a single evaluation index, which is difficult to comprehensively evaluate radar signal stealth capability. Based on this, this paper improves the evaluation factor on the basis of previous LPI evaluation factor, relative entropy and interception factor, and eliminates the factors that have no influence on the power spectrum distribution. A new spectral distribution factor is constructed and the spectral distribution factor of ideal LPI signal is used to normalize the spectral distribution factor. The final calculation formula of relative entropy is simplified to reduce the dependence on the calculation process. The relative entropy can be calculated only by the beginning and end of the empirical distribution function of random variable after integral transformation. The interception factors are sorted out again to extract the power, time width, bandwidth and other factors that affect the stealth performance of radar signal. A new comprehensive stealth measure was constructed from the above three stealth evaluation indexes by means of equal weight product. The comprehensive stealth measure is used to simulate common LPI radar signals, and the effectiveness of the comprehensive stealth measure is proved by simulation analysis.