Design Of Digital Down Conversion With FPGA

The research of using FPGA to implement DDC has been done in this paper.The focus is the design of three important modules.The system simulation is also be finished.The aim is to realize a single channel DDC chip with FPGA. the American Intersil company's HSP50214B is taken as an example,which is widly used and represent the highest level in the world now.The design refers to the chip in configuration and some parameters.An study on the theoretical knowledge of software radio and digital signal processing has been finished.The emphases is analysing the measure of using FPGA to implement DDC,framing systerm scheme,parting modules and defining interface signals.The arithmetics which are applied in the design are compared with each others to ascertain the efficient methods.With the FPGA design method,the main critical modules have been implemented,synthesized and simulated.Finally,the whole system is debugged on the StratixII EP2S60's special board.For the complexity of the design and the short of time,the system simulation has not been finished completely. However, the verification results show that the strucure and the idea of design is correct.Then the next work is to refine the design and finish the system simulation and verification.