针对利用FPGA进行2FSK系统的设计问题,通过复用高性能的Xilinx IP Core,选择相位抖动、泰勒级数纠正等方法改进输出频率特性,构建了关键的DDS电路模块。按相互协调方式分别进行了调制、解调部分的设计实现和主要模块编程,仿真表明完全满足工作要求,方法简便且系统性能可调控,较利用传统方法或DDS电路模块实现该系统节约FPGA资源,极大提高设计效率。%Aiming at design of 2FSK system based on FPGA,high-performance Xilinx IP Core can be used to realize the key circuit of DDS with options of phase dithering or Taylor series correction, which can improve output frequency characteristic. Modulator and demodulator are designed respectively in intercoordination manner,and main modules are programmed. It is proved that system can fulfil requirement of operation from simulation. This method is simple and convenient,meanwhile,performance can be adjusted. It saves a FPGA resource comparing to traditional method or using DDS module directly,and enhances the design efficiency obviously.
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