Wcdma Mobile Station Receives A Number Of Key Technologies And Realization

The researches in this dissertation focus on several key technologies in MT receiving of wideband code division multiple access(WCDMA) system, including digital matched filter, RAKE receiver, design method of synchronization and digital shaping filter. The main contents consist of six parts. The first part focuses on the development, organization, features and the key technologies of the third generation mobile communication. In the second part, based on the comprehensive survey of the operational principle of matched filter and its application in CDMA system, we present a time division digital matched filter according to the channel setting for WCDMA system, which is used for mobile tenninal(MT) receiving. The third part deals with a RAKE receiver based on the time division digital matched filter. We set the system model of the RAKE receiver, analyze its principle and propose its implementation scheme. Furthermore, we study a RAKE receiver which supports macro diversity. Some problems which must be concerned in the system realization are also discussed in this part. In the forth part, we study the problems of synchronization in WCDM MT receiving. First, we analysize the performance of coherent and noncoherent DLLs, then we give an implementation scheme of DLL and a design method of carrier tracking loop.The design methods and a implemention scheme of a FIR shaping filter is proposed in the fifth part.