Step tracking method for beam alignment in satellite communications

A step tracking method for beam alignment in satellite communications,

• wherein an antenna of a user terminal performs peak location detection on a two-dimensional beam pattern within a main beam region and executes the peak location detection using iterative bivariate (two-dimensional) quadratic approximation (curve fitting), thereby realizing step beam tracking for satellite communications;
• wherein, in each iteration, the step beam tracking method comprises:
• decoupling:
• at a given initial position, decoupling a bivariate (two-dimensional) joint function into two mutually orthogonal one-dimensional quadratic functions;
• estimation:
• for each of the one-dimensional quadratic functions, respectively estimating quadratic approximation parameters thereof;
• tracking:
• based on the respectively estimated quadratic approximation parameters, calculating and obtaining a target two-dimensional peak position;
• setting an initial position for a next iteration:
• setting the two-dimensional peak position obtained in a current iteration as an initial position for a subsequent iteration;
• and
• stopping:
• terminating the peak location detection when predefined stop conditions are satisfied.