In this thesis, we achieve a platform that receives analog signals and converts them into digital signals. By using Field Programmable Gate Array, this platform processes the digital signals in demodulation or others processes. The processed signals be passed to personal computer by Universal Serial Bus. Finally, the computer’ program shows or saves the signals. We realize this platform in the idea of FPGA’s variously design and USB’s high speed. And the signals received by computer are analog. The platform supplies a convenient and direct way for computer in processing analog signals. The purpose is to realize a receiver platform that is convenient by using computer to show, analyze and save the signals. This platform uses the idea of Software Defined Radio.