Research On Realization Of IF Digitization Key Algorithms Based On FPGA

The technique of Software Defined Radio has been applied widely once it was provided in 90th. A design for SDR commuanication ststem was investigated in this paper. Design and realization of IF unit were investigated with more attentions. Given the practical application, a digital IF/BB process platform based on FPGA and DSP was put forward in the paper. The excellence of FPGA and DSP could be joined by the platform. The characteristic of this architecture was all the IF signal process arithmetics were realized by software. The platform mainly included high speed A/D, very large scale FPGA, high speed DSP, external memory, and so on. FPGA and DSP was the core of the system. The DSP C6416 and FPGA XC2V2000FG676 were adopted in the system. It could both give attention to the speed and agility.Research on the establish of digital IF process platform based on FPGA and DSP and the realization of several key arithmetics were provided in this paper, IF digitization of new SDR communication module and the realization of several key arithmetics were accomplished. It included design of the universal digital IF circuit, the interface of FPGA and DSP, A/D, the realization of digital communication key techniques (digital up/down convertion, modulation and demodulation, channel encoding and decoding, interleaving and deinterleaving) based on FPGA. The system has been simulated and validated in software such as Matlab, ISE, Modelsim, Visual DSP++, ChipScope Pro and so on. The system has been used. The result indicated that the scheme introduced in the paper was right and it has reached the request. The work in the paper had important reference value for realization of other SDR system.