An analysis of fourier spectrograms of different ultra-wideband signals for radio systems

The paper presents theoretical bases of the signal time frequency analysis with use of the short-time Fourier transform (STFT) in a form of Fourier spectrograms. The Fourier spectrograms' properties for the different nanosecond radio ultra-wideband (UWB) signals with different functions and widths of the window for the short-time Fourier transform are analyzed.