Signal design based on post-detection SINR for MIMO radar in the presence of signal-dependent interference

In this study, the target detection and signal design problems in the presence of signal-dependent interference for a colocated multiple-input multiple-output (MIMO) radar employing a space-(slow) time transmit signal are addressed. Due to the large dimension of the clutter covariance matrix (CCM) in MIMO radars, the Kronecker form of the CCM is exploited to derive a Rao-based detector, which does not require the secondary data. According to the numerical results, the proposed detector considerably outperforms its competitors. Additionally, by tackling a non-convex sum of ratio problem, a low-complexity algorithm is devised to maximise the post-detection signal-to-interference-plus-noise ratio (SINR) under constant modulus and similarity constraints. Finally, using the simulation results, the effectiveness of the designed signal on the system performance is highlighted.