汽车雷达多域联合调制波形

In view of the problems of low time-space utilization and Doppler ambiguity of high-speed targets in time division multiplexing (TDM) multiple input multiple output (MIMO) waveforms of automotive radar, a multi domain jointly modulated automotive radar waveform is proposed. The waveform is jittered with pulse repetition intervals in the time domain, so that the phase difference between odd and even sequences can be used to realize velocity ambiguity resolution. In frequency and spatial domain, the waveform orthogonality is achieved by Doppler frequency modulation, which improves the transmission efficiency in time and space. The effectiveness of the proposed waveform is verified by simulation and experimental results based on the automotive radar waveform verification system. Compared with the traditional TDM-MIMO waveform, this waveform has a larger unambiguous velocity range and coherent accumulation gain. The waveform not only has strong application value for automotive radar engineering practice, but also has guiding significance for low-cost guidance or collision avoidance detection systems.