Two waveform design criteria for colocated MIMO radar

Different from phased-array radar, multiple-input multiple-output (MIMO) radar with colocated antennas would illuminate waveforms with different signatures into different spatial directions. In this paper, we study the waveform design problem for colocated MIMO radar and state the necessity to suppress sidelobes of returns of possible targets rather than the waveforms illuminated from antennas. A waveform design criterion for omnidirectional beampattern is proposed that suppresses both auto-correlation and cross-correlation sidelobes of angular waveforms. We also propose that received beamforming can also be taken into account in waveform design and then propose another waveform design criterion that suppresses only auto-correlation sidelobes of possible target returns, leaving cross-correlation sidelobes suppressed in receive beamforming. Numerical results indicate that the later can achieve a lower sidelobe level.