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Eliminate the impact of information and data for the hopping carrier spectrum analysis based on parallel acquisition algorithm using trigonometric function transform method using three-point quadratic interpolation to refine the frequency estimate. By this method improved to improve the accuracy of the Doppler capture, to further improve the accuracy of carrier acquisition. FPGA design and implementation of the program provides a theoretical basis. In the study of signal acquisition algorithm should also consider some of the monitoring and control of its own characteristics. In the field of measurement and control, spacecraft trajectories are known, in most cases you can use the spacecraft trajectories in terms of the spacecraft motion brought by the Doppler effect, but will also appear Spacecraft on track the situation, therefore should be considered in the capture of the optimal conditions for capture unknown Doppler algorithm and under known conditions Doppler algorithm for optimal capture.

Research on a modified carrier capture based on frequency analysis