The parameter setting problem of signal OFDM-LFM for MIMO radar

Multiple Input Multiple Output (MIMO) radar is a new radar technique, which transmits orthogonal signal at the transmitter and forms wide beam. In this paper, we select the orthogonal frequency division multi LFM signal as the orthogonal waveform. In this model, the bandwidth of single LFM and the frequency interval are important. Only the situation of equi-interval frequency is studied here. Assume the bandwidth is fixed, the selection of frequency interval affects not only the range resolution and processing speed, but also other performance of radar. In this paper, we investigate the relationship of the two parameters, also the concepts of range sidelobe are introduced. Then we demonstrated the random initial phase can suppress the second-class sidelobe. In the end, we draw the conclusion that by appropriate parameter setting, the OFDM-LFM waveform can has good performance in MIMO radar.