MIMO Radar OFD-LFM Waveform Design with Autocorrelation Grating Sidelobe Suppression

Aiming at solving the problems that the spatial synthesized signals of orthogonal frequency division-linear frequency modulation(OFD-LFM) waveform have high grating sidelobes, a new multiple input multiple output radar OFD-LFM waveform design method with suppressed grating sidelobes of autocorrelation function is propsoed. Firstly, the least frequency step is determined with which the transmit signals are completely orthogonal. Based on the least frequency step, frequency codes space is constructed. Then the frequency codes and the phases of transmitted signals can be calculated using genetic algorithm and sequential quadratic programming. Simulation results have demonstrated that the obtained waveforms realize the nullification of the grating sidelobes and are completely orthogonal.