Calibrations of Satellite Navigation Signal Simulator channel-delay based on Hilbert Transform Envelope Detection Method |
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| Hu Lizhi, Ma Zhichao, Xu Jie, Zhang Yu, Xu Liang, Dong Lian, Lai Lei, Sang Yu |
- Abstract:
- Satellite navigation signal simulators are widely used in validation of navigation system and test of navigation receivers, so the correctness and accuracy of the signal simulated are highly concerned in the field of satellite navigation. Channel-delay is one of the important parameters in Calibration for Satellite Navigation Signal Simulators. This paper designs an auto-test system of channel-delay based on Hilbert Transform Envelope Detection method, which can automatically complete multiple test of channel delay and calculate the uncertainty of measurement through high speed oscilloscope. In order to determine the exact location of the turning point, the system processes the signal by using the envelope detection method based on Hilbert Transform, and the minimum point of the signal level envelope is used as the turning point. Then, the channel delay of the simulator is finally obtained. The actual results show that the method can improve work efficiency, and is capable to raise the channel delay measurement accuracy up to 0.1ns. In conclusion, analysis of the test result implies that this method can be applied to test and calibration of the channel delay of the simulator. This methods also can be applied to high-precision calibration of GNSS simulator zero value and pseudorange.
- Keywords:
- Satellite Navigation Signal Simulator, channel-delay, Hilbert Transform
- Download:
- IMEKO-TC4-2016-43.pdf
- DOI:
- -
- Event details
- IMEKO TC:
- TC4
- Event name:
- TC4 Symposium 2016
- Title:
21st IMEKO TC4 Symposium on Measurements of Electrical Quantities (together with 19th TC4 International Workshop on ADC and DCA Modeling and Testing, IWADC)
"Understanding the World through Electrical and Electronic Measurement"- Place:
- Budapest, HUNGARY
- Time:
- 07 September 2016 - 09 September 2016