Realization and Application of a Dynamic Performance Test Method for GNSS Receiver Based on Signal Transponder

In this paper, a test method based on signal transponder was proposed to realize dynamic performance test and evaluation of high precision GNSS receiver, especially for the integrated receiver which was used in high-precision differential measurement under actual working conditions. In the method, a transponder was used to transmit navigation satellite signal into vehicular microwave anechoic chamber. The same satellite signal was simultaneously received by the tested receiver and the reference device installed in the chamber, which ensured that the observed position was equivalent to the same reference position, eventually the relative stability problem of comparison tests was solved. The test platform was constructed on the moving platform: the interior of the vehicle-type square cabin was installed with absorbing materials, and the vehicular microwave anechoic chamber was built to form an ideal signal transmitting condition. Several experiments were carried out on the platform to test the receiver’s differential measurement accuracy and velocity measurement accuracy under dynamic conditions. Test results fully verified the feasibility of the proposed method. This method could effectively test the performance of the high-precision receiver under the actual working condition, and provide an effective solution for dynamic performance test and evaluation of the receiver.