Abstract
The multiple-input multiple-output (MIMO) radar has drawn considerable interest recently. Many notable research results have been obtained, such as virtual receive array (VRA) concept for orthogonal waveform transmitting MIMO radar. The mono-static MIMO radar proposed in this paper shares the same transmit and receive antenna array, so it is very similar to conventional transmit/receive (T/R) digital beamforming (DBF) radar. The VRA concept can be easily extended to T/R DBF radar system by re-designing the antenna array structure. In this paper, an optimal antenna array design for mono-static MIMO radar is proposed in order to improve the interferences rejection capabilities. The minimum redundancy array (MRA) concept is also used to maximize the antenna virtual aperture for an array of given numbers of elements. Simulation results show that compared with the T/R DBF radar, the proposed monostatic MIMO radar can effectively improve the interferences rejection capabilities, especially the mainlobe interferences rejection capabilities. Moreover, mono-static MIMO radar with MR VRA has better interferences rejection performance than mono-static MIMO radar with uniform VRA.
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