Transmit Energy Focusing for DOA Estimation in MIMO Radar with Colocated Antennas

In this paper, we propose a transmit beamspace energy focusing technique for multiple-input multiple-output (MIMO) radar with application to direction finding for multiple targets. The general angular directions of the targets are assumed to be located within a certain spatial sector. We focus the energy of multiple (two or more) transmitted orthogonal waveforms within that spatial sector using transmit beamformers which are designed to improve the signal-to-noise ratio (SNR) gain at each receive antenna. The subspace decomposition-based techniques such as MUSIC can then be used for direction finding for multiple targets. Moreover, the transmit beamformers can be designed so that matchedfiltering the received data to the waveforms yields multiple (two or more) data sets with rotational invariance property that allows applying search-free direction finding techniques such as ESPRIT or parallel factor analysis (PARAFAC). Unlike previously reported MIMO radar ESPRIT/PARAFAC-based directi...

• Type: Journal
• Year: 2010
• Where: CORR
• Authors: Aboulnasr Hassanien, Sergiy A. Vorobyov
• Keywords: CORR 2010, Education, Multiple Targets, Rotational Invariance Property, Transmit Beamformers