Abstract
Focusing on the signal-to interference-plus-noise ratio (SINR) maximization in colocated multiple-input multiple-output (MIMO) radars, using the covariance matrix design of transmitted waveforms, we propose a kind of transmit covariance matrix (TCM) $\mathrm{R}_{pm}$ with the form of symmetrical Toeplitz matrix, whose full rank characteristic firstly can sufficiently exploit the waveform diversity advantage of MIMO radar to further suppress the maximum number of interfering sources. Meanwhile, the positive semi-definition characteristic of $\sin((\pi/2)\mathrm{R}_{pm})$ guarantees that these TCMs can be synthesized with binary phase shift keying (BPSK) waveforms in closed form. Furthermore, employing certain proposed TCM, higher SINR level can be yielded, and lower sidelobe levels (SLLs) can be obtained for the unwanted sidelobe interference suppression. Simulation results validate the better performance of our proposed TCMs in comparison with the phased array, omnidirectional MIMO radar and the recently proposed TCMs.
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