| Software defined radio is the way to solve the problem of multi-system coexistence and non-uniform stands among different system in radio communication field. Since the software defined radio is based on the software programming to implement various functions, the main feature is its flexibility and openness. As long as the signal frequency band can be processed in hardware system, one can apply software to add more communication function in that signal frequency. Software defined radio’s feature reflects in that it can be programmed and upgraded. The software radio hardware platform is the one to process the signal and implement various communication functions. So it is an indispensable part in software defined radio system.Firstly, the technical principles of the software defined radio and the structure of the software defined radio hardware platform from theoretical and technical perspective are investigated in this thesis. Their advantage and disadvantage are compared by us, the software defined radio is made finally, where ADI’s AD9361 which is a RF transceiver chip processor core pieces is used. Secondly, the software radio hardware platform is divided into three main parts: AD9361 module, signal interface module and power module. A number of options about AD9361 chip, the signal input or output interface implementations, the FMC connector implementation, the power supply circuit implementations, the power monitor circuit implementations are introduced in this thesis. In the promise of ensuring signal integrity and power integrity, we complete the PCB layout design. Finally, with the ML605 development board, the hardware platform is tested. It can correctly receive the signal of the GSM by connecting the software defined radio and the antenna. The test result show the correctness of the design of software radio hardware platform and also verifies its good functionality and performance.This thesis proposes a design of software radio hardware platform based on AD9361. The working frequency of this platform is between 70 MHz and 6GHz. It contains the complete transmitting and receiving function, with various operating modes and wide applicability. By connecting the FMC connector with Xilinx’s Virtex-6 FPGA ML605 Evaluation Module, it can achieve RF development, broadband communications, modules test and evaluation. It is of great value and significance to the software radio product at the present stage. |
