INTERPOLATION OF FUNCTION WITH DISCRETE FOURIER TRANSFORM
St. Petersburg State University of Aerospace Instrumentation, Department of Information Network Technologies; Professor
Abstract. There are investigation of linear distortion in the time of irregular process interpolation on the principles of its spectral concentration samples, that were received with the discrete Fourier transform. Interpolation mistakes for different spectral correlation characteristics of irregular process are analysed. It’s showed that interpolation mistakes amount to zero in the sample points and they amount to their maximum meaning in the middle of sampling period.
Keywords: spectrum, digitization, reconstruction, errors.