Optimal signal design for frequency diversity MIMO radar

The method to solve the problem of co-located multiple input multiple output (MIMO) radar optimal signal design for extended target detection and identification is proposed. To realize frequency diversity and increase degrees of freedom, it applies multiple frequency array (MFA) to co-located MIMO radar for performance enhancement. And it is based on mutual information (MI) in the frequency domain by means of optimizing power distribution on different frequency antenna to design radar signal for cognitive function. Radar optimizes signal power allocation again in the presence of clutter and interference, where the interference is released by target on the basis of radar power allocation to avoid detection and identification. Simulation results indicate that the optimized signal can adjust distribution of power again according to statistical characteristic of noise, clutter and interference, improve mutual information between target frequency response and target echo, and lay the foundation for performance improvement of target detection and identification.