Frequency domain solution time delay fuzzy method for deep space antenna

The invention proposes a frequency domain solution time delay fuzzy method for a deep space antenna and aims at providing the method which does not depend on prior information (accurate site location and the transit trajectory of a spacecraft). The method is achieved through the following technical scheme which comprises the steps: calculating and obtaining a non-fuzzy frequency range of a frequency domain phase spectrum in an initial time delay range between given channels according to the geometric orientation between the spacecraft and a ground station; carrying out the correction of time delay between channels in the range according to the precise estimation results, obtained through curve fitting, of time delay; updating the non-fuzzy frequency range of the frequency domain phase spectrum according to the correction precision of time delay, obtaining the further precise estimation of time delay in the range through curve fitting, and carrying out the correction of time delay between channels according to the estimation results; carry out quitting if the correction precision of time delay meets the requirements, or else repeating the last step till the correction precision of time delay meets the requirements. The method gets rid of the excessive dependence on accurate site location and the transit trajectory of the spacecraft.