Modeling And Simulation Of UWB Wireless Communication Channel

Ultra-Wideband (UWB) wireless communications technique originated from1960s which wasapplied to radar and positioning system. The remarkable advantages of UWB such as great systemcapacity, high transmission speed, excellent anti multipath interference capability, and lowcommunication cost make it a hotspot of wireless communication research. UWB was considered asthe key technology of the next generation wireless communications.This dissertation mainly studies the UWB indoor model based on IEEE802.15.3a modelaccording to the characteristics of UWB signal propagation and a couple of improved models areproposed. The aim of this study is to establish the appropriate channel models which can betterdescribe the propagation characteristics of UWB.The main achievements of this dissertation are to propose the improved channel models of theindoor LOS/NLOS environments based on IEEE802.15.3a model. The semi-deterministic channelmodel based on LOS environments generate impulse responses which resembles the measuredchannel impulse responses better than IEEE model, it is simplified by alternating IEEE model’srandom arriving multiple clusters to two deterministic clusters, which simplified the model itselfand the model parameters. The two-cluster model reflects the observed clustering of the multipathin the scattering environment well and it’s parameters are easily computed from the data, which canmake this model used in the practice better.After the study about UWB channel model, the dissertation did some extension research aboutthe RAKE receiver, analyzed the performance of A-RAKE, S-RAKE and P-RAKE by theoreticaldeduction and computer simulation.