基于自适应IIR滤波的抗干扰DDS系统设计

摘要

介绍了利用FPGA实现抗干扰DDS系统的设计，着重阐述了DDS系统在FPGA中的具体设计方案以及相位累加器设计和相位幅度转换电路及控制电路的设计；给出了利用FPGA实现DDS系统的仿真结果以及控制原理图；滤波器模块采用了自适应IIR滤波器，增强了该系统的抗干扰效果。%The design of the anti-jamming DDS system realized by using FPGA is introduced. The design scheme of the DDS system,design of phase accumulator,phase amplitude switching circuit and control circuit are elaborated. The simulation result control schematic diagram of the DDS system realized by using FPGA are offered in this paper. The adaptive IIR notch fil-ter is used as filter module to enhance the anti-jamming effect of the system.