A Novel Transmit Weight Scheme for MIMO Radar Multiple Target Detection

Multiple-input multiple-output (MIMO) systems have shown a new paradigm of radar research in recent times. MIMO radar with transmit and receive schemes received special attention from many research topics due to their ability to improve system performance. Recently, a joint transmit and receive weight scheme is proposed for MIMO radar, outperforming the existing receive combining schemes of MIMO radar. However, the scheme can tackle the detection of only one target in a coherent processing interval (CPI) for optimal performance. The scheme still works for multiple resolvable targets in a CPI with transmit weights selected optimally for only one target. Hence, the performance deteriorates due to the deviation in the transmit weights for other targets. Therefore, in this paper, a novel transmit weight scheme that can optimally address multiple targets in a CPI is proposed. MIMO radar with the proposed transmit weight scheme performs optimally over the popular schemes addressed in the literature.