FINITE FOURIER SERIES DECOMPOSITION OF FUNCTIONS (SIGNALS) OF TWO VARIABLES | Asian Journal of Math

In this paper, we use the inverse of the generalised difference operator to apply the principles of discrete orthonormal systems of functions and deduce certain findings on trigonometric functions. In addition, we use MATLAB to build a new approach for determining the finite Fourier series decomposition of real-valued functions of two variables and analysing the output signals following decomposition of input signals such as trigonometric functions.

Please see the link :- https://www.ikprress.org/index.php/AJOMCOR/article/view/1046