The article discusses the fast playback functions of several variables formed during the processing of sensor readings, combining input-output analog data and the actual arithmetic calculations on the basis of multivariate splines. In this case, the allocated basic multivariate splines, which give the Fourier transform in a clear analytic expression based on the elementary functions of frequency arguments.
Keywords: B-splines, Multivariate splines basis, bilinear splines, piecewise polynomial, piecewise-planar splines
