On Parameter Identifiability of MIMO Radar

A multi-input multi-output (MIMO) radar system, unlike a standard phased-array radar, can transmit multiple linearly independent probing signals via its antennas. We show herein that this waveform diversity enables the MIMO radar to significantly improve its parameter identifiability. Specifically, we show that the maximum number of targets that can be uniquely identified by the MIMO radar is up to $M_{t}$ times that of its phased-array counterpart, where $M_{t}$ is the number of transmit antennas.