基于System Generator的Costas锁相环设计实现

Design and Implementation of Costas-PLL Based on System Generator

介绍了一种基于Xilinx公司FPGA开发工具System Generator进行全数字Costas锁相环的设计仿真方法。通过对Costas锁相环原理的分析,从离散域变换阐述了环路参数的计算及电路设计,基于对CORDIC算法设计DDS的讨论,利用FPGA实现了设计,最后全面分析了环路性能。

This paper presented a designing and simulation method of all-digital Costas PLL based on the System Generator of Xilinx＇ s FPGA developing tool. We analyzed the principal of the Costas PLL. From the discussion in the discrete domain, we expatiate the parameter computing and circuit designing. The design is implemented with FPGA that based on the DDS contriver with the CORDIC arithmetic. At last, we studied the performance in different aspect of the Costas loop.