Research On Wireless Channel Model Based On Geometric Statistical Method

With4G licenses finally released, the mobile communication industry ushers in anunprecedented opportunity. In order to satisfy the high-speed data transmission and high quality ofthe signal, the research about wireless channel models which are suitable for our country’scommunication propagation environment has become a crucial research topic.On the basis of introducing classical geometric models, in this thesis, geometric statisticalmethod is used to simulate channel characteristics of a novel disk channel model which include thedistribution of angle-of-departure (AOD), angle-of-arrival (AOA), time-of-arrival (TOA) and thedelay spread. Furthermore,compared with the classical geometrically based single bounce circularmodel (GBSBCM), simulations illustrate that the novel disk channel model can be better fit for therealistic communication environment. Subsequently, by varying the radius of the disk and thedistance between base station and mobile station, the difference of channel characteristics issimulated and analyzed. At last, the improved disk scattering model which is studied can control thedensity of local scatterers in a disk by adjusting the shape factor. So the improved model candescribe complex scattering conditions.In consideration of actual communication environment, the shape factor can be determinedaccording to properties of scatterers distributed. Consequently, the proposed models can be moreconvenient for channel modeling, and the correlate results can provide a theoretical reference fordesigning directional antennas and constructing base stations.