Step tracking method for beam alignment in satellite communications

Abstract

The present invention relates to a step tracking method for beam alignment in satellite communications. The method performs peak location detection of a two-dimensional beam pattern within the main beam region by iterative bivariate quadratic approximation. Each iteration comprises: decoupling the bivariate joint function into two orthogonal one-dimensional quadratic functions; estimating the quadratic approximation parameters of each function; calculating the target two-dimensional peak location based on the estimated parameters; setting the obtained peak location as the initial position for the next iteration; and terminating the detection when stop criteria are satisfied. This invention provides fast convergence, low computational complexity, high accuracy, and robustness against noise for satellite tracking.

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