Software defined radio prototype for W-CDMA and IEEE802.11a wireless LAN

In this paper, the configuration and key technologies of a newly developed small-size software radio terminal for new generation seamless mobile communication systems are introduced. The terminal consists of a common platform that includes an original field programmable gate array (FPGA) board with four FPGAs, a CPU board that has two CPUs and is operated by μITRON, and RF boards with open interfaces. Users have only to prepare software for the FPGAs and CPUs that can configure mobile communication systems that the users wish to operate. In addition, the common platform has control software that can change communication systems as users require. On the common platform, the W-CDMA and IEEE802.11a software that realizes the physical layer, data-link layer, and network (TCP/IP) layer has been established. Users can change communication systems by using programmed control software that receives users´ requests, propagation characteristics, data errors, and so on from the RF board and FPGA board.