Low SNR FMCW signal processing with prior information

HOU Qing-wen; XU Zhi-wei; LU Yi-fang

doi:10.13374/j.issn2095-9389.2015.03.016

Volume 37 Issue 3

Jul. 2021

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HOU Qing-wen, XU Zhi-wei, LU Yi-fang. Low SNR FMCW signal processing with prior information[J]. Chinese Journal of Engineering, 2015, 37(3): 366-372. doi: 10.13374/j.issn2095-9389.2015.03.016

Citation:

HOU Qing-wen, XU Zhi-wei, LU Yi-fang. Low SNR FMCW signal processing with prior information[J]. Chinese Journal of Engineering, 2015, 37(3): 366-372. doi: 10.13374/j.issn2095-9389.2015.03.016

HOU Qing-wen, XU Zhi-wei, LU Yi-fang. Low SNR FMCW signal processing with prior information[J]. Chinese Journal of Engineering, 2015, 37(3): 366-372. doi: 10.13374/j.issn2095-9389.2015.03.016

Citation:

HOU Qing-wen, XU Zhi-wei, LU Yi-fang. Low SNR FMCW signal processing with prior information[J]. Chinese Journal of Engineering, 2015, 37(3): 366-372. doi: 10.13374/j.issn2095-9389.2015.03.016

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Low SNR FMCW signal processing with prior information

doi: 10.13374/j.issn2095-9389.2015.03.016

HOU Qing-wen^{1,2
,
,},
XU Zhi-wei^1,2,
LU Yi-fang¹

1. School of Automation & Electrical Engineering, University of Science and Technology Beijing, Beijing 100083, China;
2. Key Laboratory of Advanced Control for Iron and Steel Process (Ministry of Education), Beijing 100083, China

Received Date: 2013-12-26
Available Online: 2021-07-10

Abstract

Abstract

A solid surface frequency modulated continuous wave (FMCW) radar signal model was built to solve the range ambiguity problem of wideband and low signal-to-noise ratio (SNR) FMCW signal under severe measurement conditions. Based on prior information, a distanee 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 interception, respectively.
- radar,
- prior information,
- signal-to-noise ratio,
- processing algorithm,
- distance measurement