Design And Implementation Of Demoboard Integrated Baseband And Intermediate Frequency

There is less limit of space between people with the development of mobile communication. In the recent dozes of years communication technology has greatly developed from analogy mobile communication and GSM to 3rd Generation including WCDMA, cdma2000, TD-SCDMA, WiMax. With the development of mobile communication, there are many problems including kinds of communication systems kinds of criterions frequency resource starvation. The traditional communication system foucsing on hardware and special function is not suitable in these environment. The criterions limits the communication between devices in diferent bands and ways of modulation. We need a radio which has kinds of modes and bands and is programable and universal. The software defination radio is born because of the problems.Due to the problems above some organizations make their own structure of SDR. In this text we design an assembly line demoboard based in OMAP-L137 in baseband module refering to SEED-DEC137 and XC3S2000 in intermediate frequency module refering to USRP2. The design of demoboard and system migration are successful.At first some kinds of structure of SDR are introduced. After that the baseband module and intermediate frequency module are introduced including their memory module, communication module, power module, A/D module and so on. And then the communication between two modules and radio frequency module including the relationship between bandwidth and the type of devices are introduced. Once more the software of demoboard is explained, including the design of software , system migration and driver.At last in the text the test of the process of system is explained, including the problems, the course and the ways that how to work out the problems. In the end of the text, the improvement of demoboard is introduced.