The core idea of software radio is in the general hardware platform of communi- cation software, loaded with different ways of communication between the conversions. This new design make different communication hardware equipment different communication, this discusses project is an FPGA-based system of UUC and UDC in the software radio. The paper put up a method of digital converter system design based on FPGA and research, and then simulation by Quartus II and proved the feasibility of the design.

　　Firstly, this article briefly introduces the basic structure of software radio, and analyzes in detail its key technology—digital frequency parts of the functions and pri- nciples. Then separately design function module, including the NCO’s design, digital signal decimation filter(CIC integral comb filter、HB half band filter)design, FIR plastic filter’s design, SCIC interpolation filter’s design. At last, on this basis, with VHDL language description and through the Quartus II platform to get the right simulations results, and verify the feasibility of the FPGA design.

　　Keywords: Software radio, DDC/DUC, FPGA, VHDL 哪里有射频培训机构