Research And Development Of TD-SCDMA Synchronization Module

As the rapid development of mobile communications industry, (3G) mobile communication technology comes upon the technology stage. Now China give priority to develop of TD_SCDMA Technology. Resolve synchronization problem plays a very important role in the TD_SCDMA system design.Because uplink and downlink signals are at the same frequency In the TD_SCDMA system , base stations should know the location information of the first change point and the second change point, avoiding conflicts of uplink and downlink communication. Therefore, base stations in TD-SCDMA system require the synchronization control module to control the alternation, which are able to gain the information of the change points from the physics channel.This paper belongs to the project of TD_SCDMA synchronization module design in Firehome Technologies corporation. Firstly this paper analyzed the Cell Search Method and presented the frame structure in TD-SCDMA system. Secondly this paper presented hardware architecture and FPGA program design. Particularly, the paper gave the analysis of AGC algorithms in detail. Thirdly, the paper presented some results of verification and gave a summary of system performance analysis.In the end, the paper gave the summary to the study, referred to some points that need improve in the future work, and outlook to the development direction of the TD_SCDMA technology in the future.