IEEE Open Journal of Instrumentation and Measurement最新文献

High-Accuracy Frequency Standard Comparison Technology Combining Adaptive Frequency and Lissajous Figure

IEEE Open Journal of Instrumentation and Measurement Pub Date : 2025-02-12 DOI: 10.1109/OJIM.2025.3527536

Baoqiang Du;Yangfan Su;Zerui Yang

{"title":"High-Accuracy Frequency Standard Comparison Technology Combining Adaptive Frequency and Lissajous Figure","authors":"Baoqiang Du;Yangfan Su;Zerui Yang","doi":"10.1109/OJIM.2025.3527536","DOIUrl":"https://doi.org/10.1109/OJIM.2025.3527536","url":null,"abstract":"To meet the requirements of high-precision measurement of time-frequency multiparameters, a high-accuracy frequency standard comparison technology combining adaptive frequency and Lissajous figure is proposed. This technology uses only one reference frequency source to realize the frequency standard comparison and frequency measurement between any frequency signals without frequency normalization. First, a new frequency standard comparison signal is obtained by using an adaptive frequency standard generation module to roughly measure the measured frequency. Second, the turning period is measured by observing the Lissajous figure. Third, via the turning period and the function relation of frequency deviation, the relative frequency difference between the measured and frequency standard signals can be obtained. Finally, the phase relation between the measured and frequency standard signals is determined by oscilloscope, and then the high-accuracy measurement of the measured frequency can be realized. The testing results indicate that the accuracy of the frequency measurement in the radiofrequency range can achieve the <inline-formula> <tex-math>$10^{-12}$ </tex-math></inline-formula> order of magnitude. Compared with the traditional frequency standard comparison technology, this technology has many characteristics, such as simple operation, low cost, low noise, and high measurement accuracy.","PeriodicalId":100630,"journal":{"name":"IEEE Open Journal of Instrumentation and Measurement","volume":"4 ","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10883668","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143396328","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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OJIM 2024 Reviewer List

IEEE Open Journal of Instrumentation and Measurement Pub Date : 2025-02-06 DOI: 10.1109/OJIM.2025.3531742

reviewers

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2024 Index IEEE Open Journal of Instrumentation and Measurement Vol. 3

IEEE Open Journal of Instrumentation and Measurement Pub Date : 2025-01-15 DOI: 10.1109/OJIM.2025.3530263

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Ultrahigh-Performance Radio Frequency System-on-Chip Implementation of a Kalman Filter-Based High-Precision Time and Frequency Synchronization for Networked Integrated Sensing and Communication Systems

IEEE Open Journal of Instrumentation and Measurement Pub Date : 2025-01-09 DOI: 10.1109/OJIM.2025.3527532

Roghayeh Ghasemi;Patrick Fenske;Tobias Koegel;Markus Hehn;Ingrid Ullmann;Martin Vossiek

{"title":"Ultrahigh-Performance Radio Frequency System-on-Chip Implementation of a Kalman Filter-Based High-Precision Time and Frequency Synchronization for Networked Integrated Sensing and Communication Systems","authors":"Roghayeh Ghasemi;Patrick Fenske;Tobias Koegel;Markus Hehn;Ingrid Ullmann;Martin Vossiek","doi":"10.1109/OJIM.2025.3527532","DOIUrl":"https://doi.org/10.1109/OJIM.2025.3527532","url":null,"abstract":"The integration of radar sensing and imaging capabilities into future integrated sensing and communication (ISAC) networks enables advanced use cases, including autonomous vehicle navigation, real-time health monitoring, and smart city management. However, ultraprecise time and frequency synchronization is crucial for unlocking the full potential of such networked ISAC systems. In this article, a novel real-time wireless time and frequency synchronization scheme is developed and fully implemented on a high-end radio frequency system-on-chip field-programmable gate array (FPGA) platform. The excellent performance and robustness of the proposed solution in practical applications are demonstrated. It is evidenced that the recursive nature of the Kalman filter is well suited to the dynamic capabilities of FPGA-based simultaneous synchronization. Observed values obtained through the precision time protocol (PTP) are iteratively refined, thus effectively compensating for uncertainties encountered during a synchronization packet exchange. Due to the deterministic processing time inherent in the FPGA, the proposed synchronization method achieves exceptional precision, with clock offset deviations in the nanosecond range and clock rate deviations limited to only a few parts per billion, even across considerable distances between the network nodes.","PeriodicalId":100630,"journal":{"name":"IEEE Open Journal of Instrumentation and Measurement","volume":"4 ","pages":"1-15"},"PeriodicalIF":0.0,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10835166","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143106202","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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High-Volume OTA Production Testing of Millimeter-Wave Antenna-in-Package Modules

IEEE Open Journal of Instrumentation and Measurement Pub Date : 2025-01-09 DOI: 10.1109/OJIM.2025.3527529

Jose Moreira;Athanasios Papanikolaou;Jan Hesselbarth

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Enhancing Passive WiFi Device Localization Through Packet Timing Analysis

IEEE Open Journal of Instrumentation and Measurement Pub Date : 2024-12-27 DOI: 10.1109/OJIM.2024.3522345

Omar Dhawahir;Murat Torlak

{"title":"Enhancing Passive WiFi Device Localization Through Packet Timing Analysis","authors":"Omar Dhawahir;Murat Torlak","doi":"10.1109/OJIM.2024.3522345","DOIUrl":"https://doi.org/10.1109/OJIM.2024.3522345","url":null,"abstract":"This article presents an innovative timing-based localization method aimed at determining the positions of active WiFi devices through passive reception. The method involves capturing and analyzing the timing of over-the-air WiFi packets: request-to-send (RTS), clear-to-send (CTS), data (DATA), and acknowledgment (ACK) packets exchanged between WiFi routers and clients. The accuracy of round-trip time (RTT) estimation, crucial for distance calculation, can be affected by factors, such as clock variations between devices and, notably, the short interframe space (SIFS) time setting in the WiFi protocol. Despite SIFS time aiming to ensure a consistent interval between DATA and ACK frame transmissions, IEEE 802.11 standards permit up to a 10% variation in SIFS time. When combined with device-level disparities and environmental fluctuations, individual RTT measurements may not reliably estimate distances. In this study, we employ statistical clustering techniques, specifically k-means clustering, to enhance RTT estimation by refining coarse- and fine-timing estimates. Each captured packet pair, i.e., (DATA/ACK), is assigned to the cluster with the most similar coarse and fine RTT characteristics. Subsequently, the properties of the identified cluster (e.g., coarse RTT/fine RTT) are utilized as a more precise RTT estimate for localization computations. Simulations and experiments conducted under diverse multipath conditions demonstrate the algorithm’s accuracy in 2-D positioning, achieving an average accuracy of as low as 0.24 m in simulations and 1.18 m in experiments when the Wi-Fi router and device are separated by distances of up to 18 m. The proposed method offers a robust approach for accurate passive Wi-Fi positioning, highlighting its potential for real-world applications.","PeriodicalId":100630,"journal":{"name":"IEEE Open Journal of Instrumentation and Measurement","volume":"4 ","pages":"1-13"},"PeriodicalIF":0.0,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10817509","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143106201","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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IEEE Instrumentation and Measurement Society 仪器与测量学会

IEEE Open Journal of Instrumentation and Measurement Pub Date : 2024-12-27 DOI: 10.1109/OJIM.2024.3505992

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IEEE Instrumentation and Measurement Society 仪器与测量学会

IEEE Open Journal of Instrumentation and Measurement Pub Date : 2024-12-27 DOI: 10.1109/OJIM.2024.3505993

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Guest Editorial for Nondestructive Testing and Evaluation (NDT&E) Special Section 《无损检测与评价（NDT&E）专刊》特邀编辑

IEEE Open Journal of Instrumentation and Measurement Pub Date : 2024-12-24 DOI: 10.1109/OJIM.2024.3506272

James A. Smith;Helena Geirinhas Ramos

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Clamshell Inductive Current Coupler for Online Cable Condition Monitoring 用于在线电缆状态监测的翻盖式电感电流耦合器

IEEE Open Journal of Instrumentation and Measurement Pub Date : 2024-12-18 DOI: 10.1109/OJIM.2024.3517623

Samuel W. Glass;Jonathan R. Tedeschi;Muthu Elen;Mychal P. Spencer;Jiyoung Son;Leo S. Fifield

{"title":"Clamshell Inductive Current Coupler for Online Cable Condition Monitoring","authors":"Samuel W. Glass;Jonathan R. Tedeschi;Muthu Elen;Mychal P. Spencer;Jiyoung Son;Leo S. Fifield","doi":"10.1109/OJIM.2024.3517623","DOIUrl":"https://doi.org/10.1109/OJIM.2024.3517623","url":null,"abstract":"This document describes the adaptation of a clamshell inductive current coupler for online reflectometry testing (both frequency-domain reflectometry and spread spectrum time-domain reflectometry) to evaluate cable anomalies. The life span of safety-critical nuclear power plant cables is initially qualified for 40 years in accordance with IEEE 383 without additional testing. As plants extend their operating licenses to 60 and 80 years, justification for continued safe operation includes cable test and condition monitoring (CM) programs. Test programs traditionally involve manual interventions to disconnect the cables, perform one or several tests, then reconnect the systems, usually during refueling outages occurring only every two years. Offline testing poses an operational burden that can be minimized by online testing. This work investigates the adaptation of a clamshell inductive current coupler to inject a signal onto a cable conductor and listen for a reflected signal indicative of a damaged condition. The coupler provides >60 dB of protection, thereby allowing tests on cables up to 10 kV or more. Although the clamshell coupler is a known commercial product for cable performance testing, its use for energized cable CM constitutes a novel use case.","PeriodicalId":100630,"journal":{"name":"IEEE Open Journal of Instrumentation and Measurement","volume":"4 ","pages":"1-8"},"PeriodicalIF":0.0,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10807070","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142938284","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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