350 rub
Journal Achievements of Modern Radioelectronics №3 for 2013 г.
Article in number:
Experimental study of indoor propagation of ultrawideband chaotic signal
Keywords: wireless communications ultrawideband signals dynamic chaos chaotic radio pulse microwave oscillations signal propagation multipath environment interference diffraction reception methods noncoherent receiver multipath gain
Authors:
Yu.V. Andreyev, A.S. Dmitriev, V.A. Lazarev, A.I. Ryzhov
Abstract:
Results of experimental studies of ultrawideband (UWB) chaotic radio pulse propagation in multipath environment are presented. The experiments showed practical absence of interference of UWB chaotic radio signals by indoor propagation; lower (than for narrowband signals) attenuation of UWB chaotic signals in building walls; and multipath amplification of receiver signal in multipath environment, which was earlier investigated only theoretically. These phenomena are analyzed from single viewpoint, as consequence of autocorrelation function of chaotic signals. Since the autocorrelation function of UWB chaotic signals rapidly decays, in multipath environment reflected or diffracted signals of transmitter appear to be uncorrelated at the receiver input, so they are summed «by power», which leads to the described phenomena. Conditions are derived, necessary to observe such effects. Different types of UWB signals are compared in view of the possibility of realization of the described phenomena.
Pages: 55-66
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