A Method of Estimating DCB of the GNSS Receiver by Using the Signal Simulator
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摘要: 硬件时延是利用GNSS双频信标测量电离层总电子含量过程中非常重要的误差源,本文提出一种基于GNSS信号模拟器模拟TEC测量来间接测定接收机硬件时延的方法。模拟实验结果表明,本方法可以有效测定GNSS接收机硬件时延,且可以准确获得各通道的硬件时延信息。对某GNSS接收机测试结果显示,其GPS接收通道平均硬件时延为16.067ns,估计精度约0.14ns。本方法对GNSS接收机性能评估、硬件时延标定等具有重要意义。Abstract: DCB is the main error term while measuring the total electron content of the ionosphere based on the GNSS dual-frequency beacons.A method is proposed in this paper to estimate the GNSS receiver DCB by measuring the simulated TEC from GNSS simulator.Hardware-in-the-loop experiment has been carried out to test the validity of the proposed method.The results show that the average DCB of the tested GNSS receiver was about16.067 ns with the accuracy of about 0.14 ns.It proves the effectiveness of the presented method,which could be a useful way in GNSS receiver performance evaluation and calibration.
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Key words:
- GNSS /
- receiver DCB /
- simulator
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