Abstract:

Discrete frequency coding waveform(DFCW)is a kind of waveform in common use for multiple input multiple output(MIMO)radars. Replacing the fixed frequency individual pulses with linear frequency modulation （LFM） pulses can improve the auto correlation performance of DFCW. The genetic simulated annealing algorithm (GASA) based on the genetic algorithm(GA)and simulated annealing(SA)is used to design the discrete frequency coding waveformlinear frequency modulation(DFCW-LFM)waveform. The comparison results indicate that the performance of the designed waveform is enhanced. In addition,a modified DFCWLFM design method is proposed. Phase coding waveform is applied to the subpulses of DFCW-LFM,thus forming a compound waveform,and the GASA algorithm is also employed in its optimization. Compared with the existing DFCW-LFM,simulation results show that the performance of the proposed compound waveform in correlation is improved.