Tdd Mode Of Baseband Signal Processing Hardware Platform Design And Implementation

With the TD-SCDMA system applied in the enterprise market in China, TDDtechnology has been paid a lot of attention unprecedentedly, and the advantage of TDDhas also been fully exploited. TDD technology has only been served as a backup planin3G(3rd-generation) Era. However, in4G(4rd-generation) Era, TDD technology hasalready been able to parallel with FDD technology. In the future, TDD technology willbe definitely more competitive than FDD technology.The research on wireless data transmission communication system based on theTDD technology has been made in this paper. TDD technology has many incomparableadvantages which can provide a brand-new solution for wireless communicationsystem, such as conserving resource of frequency spectrum, suitability forasymmetrical data service, low cost and easy implementation. Hardware platform isessential in every system. Our system is based on V5series FPGA XC5VSX35T ofXilinx Company and TI’s DaVinci series DSP TMS320DM6437; in addition, thesystem adopts FPGA+DSP architecture. Our system connects network interface withthe host or the Ethernet, thereby it can implement IP business transmission.The thesis of paper is to design and implement baseband signal processinghardware platform based on TDD mode. It introduces the overall design scheme ofTDD system, and it describes TDD frame cycle, TDD frame structure and TDDimplementation. Then, it illustrates the system hardware circuit design, the modulardesign concept, the function and the features of each module, and design method ofeach module circuit. After that, it focuses on the DSP software implementation whichbased on TDD communication mode characteristics. Finally, the hardware platformand software part of the system are debugged, and the paper points out the key pointsin the debugging.