Wideband channel modeling and diversity techniques for satellite-UMTS

Next-generation satellite systems aim at providing both high-data-rate services and mobility to the users. Therefore wideband propagation channel modeling becomes crucial for system planning. This paper introduces a novel approach of generating and processing realistic wideband time series of land mobile satellite (LMS) propagation channels. It uses the results of a ray-tracing propagation model to evaluate the performance of satellite and polarization diversity including the effects of imperfect power control and signaling delay, as well as intersymbol and multiple access interference. Exemplary results are shown for the wideband code division multiple access (W-CDMA) radio interface of future S-UMTS (Satellite-Universal Mobile Telecommunications Systems)/IMT-2000 (International Mobile Telecommunications)