Satellite navigation signal code-carrier coherence analysis

Satellite navigation system Signal quality directly influence on the performance of the satellite navigation system. An ensured coherence of the code phases of the carrier phases is not only the premise for pseudo-random code ranging and carrier phase ranging, but one of the main factors that influence the positioning accuracy of navigation signals. In this paper, aiming at the code-carrier phase coherence, a key criterion for assessing the quality of navigation signals, the oscilloscope based, data collection based, and monitoring receiver based analysis and test methods are proposed, and a comparison of the characteristics of each analysis and test method are presented, with special focus on the validation of the monitoring receiver based test method. The test results show that the accuracy of the code-carrier coherence test is less than 0.5 degree.