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In this paper, we propose a cyclic prefix (CP) based MIMO-OFDM rangereconstruction method and its corresponding MIMO-OFDM waveform design forco-located MIMO radar systems. Our proposed MIMO-OFDM waveform design achievesthe maximum signal-to-noise ratio (SNR) gain after the range reconstruction andits peak-to-average power ratio (PAPR) in the discrete time domain is alsooptimal, i.e., 0dB, when Zadoff-Chu sequences are used in the discretefrequency domain as the weighting coefficients for the subcarriers. We alsoinvestigate the performance when there are transmit and receive digitalbeamforming (DBF) pointing errors. It is shown that our proposed CP basedMIMO-OFDM range reconstruction is inter-range-cell interference (IRCI) free nomatter whether there are transmit and receive DBF pointing errors or not.Simulation results are presented to verify the theory and compare it with theconventional OFDM and LFM co-located MIMO radars.

IRCI Free Colocated MIMO Radar Based on Sufficient Cyclic Prefix OFDM Waveforms