Enhanced Nicolson´s method for Fourier transform of step-like waveforms

If the discrete Fourier transform of a step-like waveform is taken, a large truncation error results since only a finite number of samples is used. Several methods have been published to overcome this problem. The authors propose a novel method, based on Nicolson´s method, to enhance resolution. This novel method is very powerful, particularly for time domain network analysis applications. The authors show the mathematical validity of the method developed. A practical demonstration is described in which the method is applied to an analytical truncated ramp and a measured waveform