Research on the Test Method of the Interior Noise of the Receiver Based on the Satellite Signal Simulator

摘要

High precision GNSS (Global navigation satellite systems) receiver is used for precision geodetic survey, crustal movement monitoring, engineering deformation monitoring, and integrity monitoring system and so on. The interior noise level is an important index to affect the positioning accuracy of GNSS receiver. Further research on the evaluation method of this paper in the detection of GNSS receiver's interior noise level; put forward the research of interior noise of GNSS receiver evaluation method based on satellite signal simulator. Based on the original zero baseline test principle, the radio frequency navigation signal generated by simulation is used to receiver test. From the test results, it can be seen that the measurement results of the simulator based on zero baseline test is 0.5mm; the measurement results are 0.4mm based on the real environment, and the measurement values are better than the 1mm design requirements. Test results show that the high precision satellite signal simulator based on zero baseline tested results are feasible. However, with the increase of the baseline length, the baseline measurement error also increases. When the baseline length is greater than or equal to 10m, the baseline error is beyond the design requirements of the receiver's nominal target 1mm. The simulation environment is repeatable and controllable, which can directly test the interior noise of the GNSS receiver without reference to the GNSS receiver configuration, which is convenient and effective.