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      Multi-antenna Remote Differential Monitoring System Based on a Single GNSS-over-fiber Architecture

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          Abstract

          In this study, we designed and demonstrated the performance of a multi-antenna remote differential monitoring system based on a single GNSS-over-fiber architecture. In this system, multiple GNSS signals are received by remote antennas through a microwave photonic link and are then transmitted to local end points. To enable fine positioning, we established a double differential model equation for use between the carrier phase of each remotely received signal and the reference GNSS signal, with the help of the time division mode using a high-speed optical switch. In our experiment, we established a 10 km microwave photonic link among three remote monitoring points. We estimate the resulting positioning accuracy to be within several millimeters and we obtained a response time of less than 10 ms. Compared with traditional single-antenna schemes, our designed system has significant advantages with respect to coverage area, real-time response time, and the performance cost of large-scale monitoring at no cost to the positioning accuracy. As such, this system will find important applications for the monitoring of large-scale civil engineering and natural environments.

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          Author and article information

          Journal
          Journal of Radars
          Chinese Academy of Sciences
          01 April 2019
          : 8
          : 2
          : 197-204
          Affiliations
          [1 ] (School of Information Science & Technology, Southwest Jiaotong University, Chengdu 611756, China)
          Article
          f3486d0f1aa047478bc159f89cf98f3d
          10.12000/JR19015

          This work is licensed under a Creative Commons Attribution 4.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

          Categories
          Technology (General)
          T1-995

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