汽车雷达多域联合调制波形

doi:10.12305/j.issn.1001-506X.2023.11.05

Abstract

Abstract:

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.

Key words: automotive radar, multiple input multiple output (MIMO) radar, multi-domain joint modulation, velocity ambiguity solution, orthogonal waveform

CLC Number:

TN958.94

Hongfei LIAN, Jiamin LONG, Xueyao HU, Yanwen JIANG, Dongsheng LI, Hongqi FAN. Multi domain joint modulation waveform for automotive radar[J]. Systems Engineering and Electronics, 2023, 45(11): 3402-3410.

Figures/Tables 17

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References 30

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参数	参数值
载频/GHz	77
带宽/MHz	150
发射天线个数/个	3
接收天线个数/个	4
脉冲重复周期/μs	50
脉冲个数/个	192
距离分辨率/m	1
速度分辨率/(m·s^-1)	0.2
最大无模糊速度范围/(m·s^-1)	±6.5

参数	目标1	目标2	目标3	目标4
真实距离/m	10	20	30	50
真实速度/(m·s^-1)	5	-15	30	45
真实角度/(°)	5	10	15	20
距离估计/m	10.01	20.04	30.05	50.1
模糊速度估计/(m·s^-1)	5.01	4.46	-8.93	6.09
奇序列二维谱峰点相位/rad	2.15	-2.97	-1.56	1.45
偶序列二维谱峰点相位/rad	-3.12	0.41	-2.03	-2.40
模糊数估计	0	-1	1	2
速度估计/(m·s^-1)	5.01	-15.02	30.03	45.05
角度估计/(°)	5.0	10.08	14.99	20.02

参数	电动车	汽车
真实速度/(m·s^-1)	-4.17	12.50
模糊速度/(m·s^-1)	1.07	1.47
相位信息1/rad	-2.13	-1.33
相位信息2/rad	1.05	-2.88
模糊倍数	-1	2
估计速度/(m·s^-1)	-4.34	12.29
估计角度/(°)	11.3	1.5

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Multi domain joint modulation waveform for automotive radar

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