| 基于先验信息的低信噪比调频连续波雷达信号处理 |
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| 引用本文： | 侯庆文,胥志溦,鲁亿方.基于先验信息的低信噪比调频连续波雷达信号处理[J].北京科技大学学报,2015(3):366-372. |
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| 作者姓名： | 侯庆文 胥志溦 鲁亿方 |
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| 作者单位： | 1. 北京科技大学自动化学院，北京100083; 北京科技大学钢铁流程先进控制教育部重点实验室，北京100083;2. 北京科技大学自动化学院,北京,100083 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 针对恶劣测量条件下宽频带低信噪比调频连续波雷达信号距离模糊问题，建立了固态料面调频连续波雷达信号模型，并提出了以先验信息为辅助，包含信号频域预处理、频带截取及频带能量加权的距离反演方法.实际数据处理结果显示：经过预处理的信号频谱平均信噪比由原来的-5.55 dB 提高到8.32 dB；采用包络线截频带法和最小二乘截频带法进行距离反演后拟合料线与实际料线间的料形相似度由0.46分别提高到0.71和0.79.
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| 关 键 词： | 雷达 先验信息 信噪比 处理算法 距离测量 |
Low SNR FMCW signal processing with prior information |
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| HOU Qing-wen,XU Zhi-wei,LU Yi-fang.Low SNR FMCW signal processing with prior information[J].Journal of University of Science and Technology Beijing,2015(3):366-372. |
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| Authors: | HOU Qing-wen XU Zhi-wei LU Yi-fang |
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| Institution: | HOU Qing-wen;XU Zhi-wei;LU Yi-fang;School of Automation & Electrical Engineering,University of Science and Technology Beijing;Key Laboratory of Advanced Control for Iron and Steel Process (Ministry of Education); |
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| Abstract: | A solid surface frequency modulated continuous wave (FMCW) radar signal model was built to solve the range ambigu-ity problem of wideband and low signal-to-noise ratio (SNR) FMCW signal under severe measurement conditions. Based on prior in-formation, a distance inversion method was proposed, which contained signal pretreatment, band intercepting, and energy weighting. Actual data processing results show that the SNR of the frequency spectrum rises from - 5. 55 to 8. 32 dB after pretreatment. The index of similarity of the stock level shape increases from 0. 46 to 0. 71 and 0. 79 by band envelope interception and least squares intercep-tion, respectively. |
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| Keywords: | radar prior information signal-to-noise ratio processing algorithm distance measurement |
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