Waveform design and processing for multichannel MIMO radar

In MIMO radar several transmitters broadcast independent waveforms which must be separated at the receivers. Typically waveforms having low auto- and cross-correlation values are used. This study proposes the transmission of several waveforms across multiple independent channels by each transmitter. Waveform sets formed from mutually-orthogonal complementary codes are shown to provide perfect resolution of returns with no cross-transmitter interference when separated in time. Square-complementary waveforms separated in frequency and subject to nonlinear processing can also resolve targets but introduce cross terms instead of correlation sidelobes. Cross terms are mitigated with frequency agility and pulse-Doppler processing.