ABSTRACT
Radar imaging systems acquire information about the scene of interest by transmitting pulsed waveforms and processing the received backscatter energy to form an estimate of the range, angle of arrival, Doppler velocity, and amplitude of the reflectors in the scene. These range profiles from multiple pulses and/or multiple antenna elements can be processed jointly to solve a multitude of inference tasks including detection, tracking, and classification [1]. In this chapter, we focus on coherent multiple-input and multiple-output (MIMO) radar systems with closely separated antennas, such that the angle of arrival of each scatterer in the illuminated scene is approximately the same for all phase centers. The main advantage of coherent MIMO radar is its ability to synthesize a large virtual array with fewer antenna elements for improved spatial processing. Additionally, MIMO radar systems with multiple transmit and receive elements employing independent waveforms on transmit can provide spatial processing gains by exploiting the diversity of channels between targets and radar [2,3].
