Research on of Simulation Doppler Frequency-Shift in Satellite Signal Simulator
Bao Lian · Information Security and Communications Privacy · 2008
The production of Doppler frequency-shift is analyzed under the high dynamic condition. The algorithm of Doppler frequency-shift estimate is studied, and then mathematic models are listed. On this basis, a scheme for utilizing DSP, which is integrated with a professional Direct Digital Synthesizer AD9954, to simulate Doppler frequency-shift is proposed. A feasible working mode for AD9954 is selected in the light of the need for the data to be simulated. The method for calculating necessary parameters is described. Finally the program flow chat for DSP controlling AD9954 to simulate Doppler frequency-shift is advanced.