Imaging of FMCW MIMO radar with interleaved OFDM waveform

A novel scheme of the Frequency-Modulated Continuous-Wave Synthetic Aperture Radar (FMCW SAR) with multiple orthogonal transmitted waveforms is introduced in this paper. Based on the Interleaved Orthogonal Frequency Division Multiplex (I-OFDM) principle, the transmit waveform successfully combines the advantages of the linear frequency modulated waveform and the OFDM waveform. This maintains FMCW SAR system smart and miniature, with lower cross correlation and higher coherence. Instead of band pass filter for traditional frequency division waveform, the division of the novel waveform is performed efficiently by the demodulation using discrete Fourier transform. At last, to verify the novel scheme, a simulation of imaging of one point is performed with two transmit waveform.