UWB Radio: A Real Chance for Application of Chaotic Communications

For lack of empty radio bands, ultra-wideband (UWB) radio that allows the reuse of already occupied frequency bands is the only solution to accommodate new wireless data communication services. The recovery of the very short and extremely wideband wavelets used in UWB radio is not feasible. This is why noncoherent demodulation techniques have to be used. Introducing a general model for the noncoherent UWB modulation schemes the paper evaluates and compares the noise performances of the noncoherent pulse polarity modulation and the transmitted reference system. Closed-form expressions are given for the noise performance of both modulation schemes. Although the former requires a deterministic carrier, the TR system may use either deterministic or chaotic wavelets.