Abstract
In this paper, we presented a novel waveform design method for orthogonal frequency division multiplexing (OFDM) multiple input multiple output (MIMO) radar with low sidelobe level and high range resolution. The signal model that all OFDM subcarriers are transmitted on each antenna is established to ensure high range resolution. And code domain orthogonality is achieved through complex orthogonal design (COD). Moreover, we transform range sidelobe suppression into an unconstrained optimization problem based on the relationship between the transmitted waveform and the phase. The Integrated Sidelobe Level (ISL) is utilized as the objective function, and then solved by Broyden-Fletcher-Goldfarb-Shanno (BFGS) algorithm. Simulation results show that the proposed method has remarkable performance in suppressing sidelobe and high range resolution.
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