New types of spread-spectrum signals have been developed. There are fractal ultra-wideband (FUWB) signals. Using correlator model, numerical simulation of measurement of the FUWB signals on the background of interferences, was performed. Experimental investigation of synthesis and generation of the fractal information signals is undertaken. Spectral characteristics of the transmitted fractal signals are measured experimentally. The signal spectra are shown to have self-similar character. FUWB signals can be applied in the communication systems, operating in the conditions of complex electromagnetic environment.