Phase unwrapping error correction for phase-derived velocity measurement under low-SNR conditions
Phase unwrapping error correction for phase-derived velocity measurement under low-SNR conditions
- Author(s): L. Guo 1 ; Q. Liu 1, 2 ; H. Fan 1, 2
- DOI: 10.1049/icp.2021.0777
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- Author(s): L. Guo 1 ; Q. Liu 1, 2 ; H. Fan 1, 2
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View affiliations
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Affiliations:
1:
Radar Research Lab , School of Information and Electronics, Beijing Institute of Technology , Beijing 100081 , China ;
2: Key Laboratory of Electronic and Information Technology in Satellite Navigation (Beijing Institute of Technology) , Ministry of Education , Beijing 100081 , China
Source:
IET International Radar Conference (IET IRC 2020),
2021
p.
493 – 497
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Affiliations:
1:
Radar Research Lab , School of Information and Electronics, Beijing Institute of Technology , Beijing 100081 , China ;
- Conference: IET International Radar Conference (IET IRC 2020)
- DOI: 10.1049/icp.2021.0777
- ISBN: 978-1-83953-540-6
- Location: Online Conference
- Conference date: 04-06 November 2020
- Format: PDF
An algorithm to correct the phase unwrapping error for phase-derived velocity measurement (PDVM) method under low signal-to-noise ratio (SNR) conditions is presented in this paper. The PDVM method for wideband linear frequency-modulated (LFM) radar can measure the velocity of a space target with high-accuracy. Under low-SNR conditions, the phase unwrapping process might occur errors which reduces the accuracy of the measurement. The proposed method analyses the factors affecting the phase unwrapping process under low-SNR conditions and presents an accurate correction for the process. Simulation results demonstrate its effectiveness. The root-mean-square error (RMSE) of the PDVM results was less than 0.025m/s when the SNR was greater than 15.8dB.
Inspec keywords: FM radar; velocity measurement; measurement errors; phase measurement; error correction
Subjects: Phase and gain measurement; Measurement and error theory; Velocity, acceleration and rotation measurement; Measurement theory; Radar equipment, systems and applications; Velocity, acceleration and rotation measurement; Electrical instruments and techniques