Abstract
An absolute calibration of navigation signal transmitting channel on navigation satellite based on multi-rate digital signal processing is addressed, it is applied for absolute calibrate of civil navigation signal transmitting channel. At first, the navigation signal and the pulse per second (PPS) generated by navigation processor are sampled synchronously, then the sampling data is processed base on multi-rate digital signal processing, the pesudocode starting point of navigation signal data can be gotten. With the sampling data of PPS, the stepping edge is denoting the PPS starting point. The space of the pesudocode starting point and the PPS starting point minutes the calibrating delay of the test cable, the absolute calibrate of navigation signal transmitting channel is obtained. The simulated result indicates the the precision of the calibrated algorithm is less than one sample period.