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Frequency-Modulated Signal Measurement Using Closed-Loop Methodology

Frequency-modulated (FM) signals are widely used in sensing, measurement, and signal detection due to their strong anti-interference and easy transmission characteristics. Although the high-precision measurement methods for static signals are quite complete, the high-precision measurement methods fo...

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Autores principales: Sun, Xinglin, Wu, Haojie, Tan, Xinyue, Wang, Wenrui, Ye, Lingyun, Song, Kaichen
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9611454/
https://www.ncbi.nlm.nih.gov/pubmed/36298171
http://dx.doi.org/10.3390/s22207822
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author Sun, Xinglin
Wu, Haojie
Tan, Xinyue
Wang, Wenrui
Ye, Lingyun
Song, Kaichen
author_facet Sun, Xinglin
Wu, Haojie
Tan, Xinyue
Wang, Wenrui
Ye, Lingyun
Song, Kaichen
author_sort Sun, Xinglin
collection PubMed
description Frequency-modulated (FM) signals are widely used in sensing, measurement, and signal detection due to their strong anti-interference and easy transmission characteristics. Although the high-precision measurement methods for static signals are quite complete, the high-precision measurement methods for dynamic FM signals still need to be studied, and the measurement accuracy in the high-sampling system still has room for improvement. Traditionally, the equal-precision measurement method is widely applied in most scenarios. However, its accuracy is limited by the quantization error of ±1 word and the sampling gate time, making it difficult to improve the frequency measurement accuracy while ensuring a high sampling rate at the same time. In this paper, a high-precision feedback frequency measurement system with the capability to eliminate the quantization error of ±1 word is proposed. The proposed system consists of two stages, the rough measurement stage based on the equal-precision measurement method and the precise measurement stage based on the negative feedback tracking architecture using the phase–frequency detector (PFD) and direct digital synthesizer (DDS). The effectiveness and feasibility of the system are verified by both simulation and experiment. At the sampling rate of 2 kHz, the frequency measurement accuracy is improved by more than 30 dB.
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spelling pubmed-96114542022-10-28 Frequency-Modulated Signal Measurement Using Closed-Loop Methodology Sun, Xinglin Wu, Haojie Tan, Xinyue Wang, Wenrui Ye, Lingyun Song, Kaichen Sensors (Basel) Article Frequency-modulated (FM) signals are widely used in sensing, measurement, and signal detection due to their strong anti-interference and easy transmission characteristics. Although the high-precision measurement methods for static signals are quite complete, the high-precision measurement methods for dynamic FM signals still need to be studied, and the measurement accuracy in the high-sampling system still has room for improvement. Traditionally, the equal-precision measurement method is widely applied in most scenarios. However, its accuracy is limited by the quantization error of ±1 word and the sampling gate time, making it difficult to improve the frequency measurement accuracy while ensuring a high sampling rate at the same time. In this paper, a high-precision feedback frequency measurement system with the capability to eliminate the quantization error of ±1 word is proposed. The proposed system consists of two stages, the rough measurement stage based on the equal-precision measurement method and the precise measurement stage based on the negative feedback tracking architecture using the phase–frequency detector (PFD) and direct digital synthesizer (DDS). The effectiveness and feasibility of the system are verified by both simulation and experiment. At the sampling rate of 2 kHz, the frequency measurement accuracy is improved by more than 30 dB. MDPI 2022-10-14 /pmc/articles/PMC9611454/ /pubmed/36298171 http://dx.doi.org/10.3390/s22207822 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Sun, Xinglin
Wu, Haojie
Tan, Xinyue
Wang, Wenrui
Ye, Lingyun
Song, Kaichen
Frequency-Modulated Signal Measurement Using Closed-Loop Methodology
title Frequency-Modulated Signal Measurement Using Closed-Loop Methodology
title_full Frequency-Modulated Signal Measurement Using Closed-Loop Methodology
title_fullStr Frequency-Modulated Signal Measurement Using Closed-Loop Methodology
title_full_unstemmed Frequency-Modulated Signal Measurement Using Closed-Loop Methodology
title_short Frequency-Modulated Signal Measurement Using Closed-Loop Methodology
title_sort frequency-modulated signal measurement using closed-loop methodology
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9611454/
https://www.ncbi.nlm.nih.gov/pubmed/36298171
http://dx.doi.org/10.3390/s22207822
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