| 引用本文: | 邹丽蓉， 朱 莉， 邵文浩. 基于改进LFMCW雷达的多目标识别算法[J]. 雷达科学与技术, 2020, 18(5): 509-516.[点击复制] |
| ZOU Lirong, ZHU Li, SHAO Wenhao. Multi-Targets Recognition Algorithm Based on Improved LFMCW Radar[J]. Radar Science and Technology, 2020, 18(5): 509-516.[点击复制] |
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| 摘要: |
| 线性调频连续波（LFMCW）雷达在单目标情况下可以根据上下扫频段的两个差频信号准确探测目标距离信息及其径向速度。在多目标情况下，上下扫频段的差频信号由于缺乏关联信息无法准确配对，导致虚假目标数目远大于真实目标数目。为准确识别真实目标，本文提出一种改进LFMCW波形，在LFMCW波形前加上两段频率值互异的恒频波段，两段恒频波段组成双频调制连续波（FSK-CW），可得到运动目标的距离信息及其径向速度用于剔除虚假目标。仿真结果表明，基于该波形的雷达在多目标情况下能够准确识别目标，且测速和测距精度都较高。 |
| 关键词: 多目标 频率匹配 虚假目标 改进LFMCW |
| DOI：DOI:10.3969/j.issn.1672-2337.2020.05.008 |
| 分类号:TN958.94 |
| 基金项目: |
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| Multi-Targets Recognition Algorithm Based on Improved LFMCW Radar |
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ZOU Lirong, ZHU Li, SHAO Wenhao
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Department of Detection and Control Engineering, Institute of Electro-Optical, Nanjing University of Science and Technology, Nanjing 210094, China
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| Abstract: |
| Linear frequency modulated continuous wave(LFMCW) radar can explore target’s range and radial velocity precisely according to two beat signals of the upper and lower sweep bands.When there are multiple targets, the beat signals of the upper and lower sweep bands cannot match correctly due to the lack of related information. Therefore, the number of fake targets is much greater than the number of real targets. To correctly recognize real targets, the article proposes an improved LFMCW waveform. Two constant frequency bands with different frequencies are added to the front of LFMCW waveform and the two constant frequency bands consist of frequency-shift keying continuous wave(FSK-CW). The range and radial velocity of the moving target can be obtained from FSK-CW and the information can be used to eliminate fake targets. The simulation results show that the radar based on this waveform can recognize targets correctly when there are multiple targets and has high range and velocity detection precision. |
| Key words: multi-targets frequency matching fake targets improved LFMCW |
