DOPPLER-CODED JOINT DIVISION MULTIPLE ACCESS WAVEFORM FOR AUTOMOTIVE MIMO RADAR
Yanhua Wang (School of Information and Electronics, Beijing Institute of Technology;Electromagnetic Sensing Research Center of CEMEE State Key Laboratory, Beijing Institute of Technology, Beijing, China); Qiubo Pei (School of Information and Electronics, beijing institute of technology;Chongqing Innovation Center, Beijing Institute of Technology, Chongqing, China); Xueyao Hu (School of Information and Electronics, beijing institute of technology;Chongqing Innovation Center, Beijing Institute of Technology, Chongqing, China); Jiamin Long (School of Information and Electronics, beijing institute of technology;Chongqing Innovation Center, Beijing Institute of Technology, Chongqing, China); Hao Yu (School of Information and Electronics, beijing institute of technology;Chongqing Innovation Center, Beijing Institute of Technology, Chongqing, China); Le Zheng (School of Information and Electronics, beijing institute of technology;Chongqing Innovation Center, Beijing Institute of Technology, Chongqing, China)
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06 Jun 2023
The slow-time coded waveform is usually chosen for the automotive multiple-input multiple-output (MIMO) radars. The two types of slow-time coded waveforms, i.e., Doppler division multiple access (DDMA) and code di-vision multiple access (CDMA) suffer from Doppler am-biguity and high side lobes respectively. In this paper, we propose a Doppler-coded joint division multiple access orthogonal waveform for automotive MIMO radars. The proposed waveform adopts less coding sequences, which leads to lower sidelobes than the conventional CDMA waveform. Meanwhile, by using unequal intervals for Doppler division, the proposed waveform can greatly extend the maximum unambiguous velocity compared with the conventional DDMA waveform. A signal pro-cessing framework is established to correctly separate orthogonal signals. Both simulations and experimental results demonstrate the effectiveness of the proposed waveform.
