A new multi-frequency random phase code radar signal designing method

We propose what we believe to be a new multi-frequency random phase code (MRPC) radar signal designing method. Its core consists of: (1) we use the chaotic biphased code based on the improved Logistic mapping and the piecewise Logistic mapping to modulate the phase of the multi-carrier phase code (MCPC) radar signal; (2) we introduce the quasi-random properties of a chaotic signal into the MCPC radar signal and design the MRPC radar signal, whose ambiguity function, interception factor and peak-to-mean envelope power ratio (PMEPR) is then analyzed; (3) to select the initial value of the chaotic sequence of the MRPC radar signal, the number of its frequency carriers and the number of its phase-modulated bits, we present their influence on the PMEPR. The simulation results, given in Figs. 2 through 6, and their analysis show preliminarily that: (1) the new MRPC radar signal we thus designed keeps the strong points of the MCPC radar signal, has the thumbtack function of the quasi-noise radar signal and the excellent anti-jamming and LPI performances; (2) the piecewise Logistic MRPC radar signal has a better performance of these kinds than the improved one.