Research Of Technology About The TD-SCDMA Propagation Model In The 3G Mobile Communication System

As our country's contribution to the international communication domain,the TD-SCDMA RTT specification that was proposed by our country has been improved and integrated by more one year.The TD-SCDMA RTT specification had been a part of the ITU IMT-RSPC.In this paper,the first part is the introduction of the TD-SCDMA RTT,the second part is the theory about the choice and the revisment of the TD-SCDMA propagation model,the last part is the discussion about the TD-SCDMA network planning theory.Firstly,this paper shows the outline of the TD-SCDMA system physical layer transmission technology.In the physical layer parameters' aspects,the paper maks the difference between the TD-SCDMA and the other specification --UTRA TDD.The paper discourses upon the concept and function of the radio propagation model.By the MATLAB software,all kinds of the propagation models are simulated.Using the simulation result,we can set up the basic concept of the propagation model.The paper demonstrates the whole plan of the propagation model application software.With the Delphi software, an application software including the function of the realtime calculating path loss value is compiled completely.The paper analyses the planning theory of the TD-SCDMA network.Its main aspects include thebackbone of the network,the link budget report,the budget of the effective distance,the analyse of the link interference and the analyse of the system capacity.