Abstract
Noise radar waveforms are unlikely to be detected and can reduce mutual interference when multiple radars are in operation. The polyphase codes, employed as noise waveforms, are to be designed to minimize the objective function, which is the sidelobe level of the autocorrelation function of each code and the cross-correlation functions between them. Optimization techniques are required to design the optimal phase code, accompanied by long code lengths and large distinct phase numbers. In this paper, we present the results of designing polyphase codes using the simulated annealing algorithm. By applying simulated annealing to the case of several distinct phase numbers and multiple codes, with code lengths of 512 or lesser, we can design optimal codes requiring short computation times of about a day.
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