Abstract

In this paper, the application of DS-SS for ranging in radar system is investigated where the radar signal is modulated by a chosen pseudo-random sequence. Based on the orthogonal characteristics of the these sequences, the correlation of emitted and received sequences is calculated and its maximum value is attained when the delayed time of emitted sequence coincides with the two-way propagation time of the radar wave. By choosing appropriate temporal scale on the delay unit, the distance of the considered object to the radar is deduced. The modelisation algorithm of the system and the simulations are set up which provide meaningful applied results for cases of noise-free and of noisy propagation medium