数字Costas环的matlab仿真及其FPGA实现
Simulation of Matlab and Implementation of FPGA Platform on Digital Costas Loop
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摘要: 基于锁相环的模型,研究了数字Costas环的结构和性能.首先介绍了Costas环的基本原理及数学模型,其次使用matlab编程的方法实现了软件上的仿真,最后在QuartusⅡ+ModelSim环境中用VHDL语言实现了该算法.仿真和实验结果表明,该Costas环路具有十分优良的性能.Abstract: This article work over the structure and capability of Costas loop on the basis of the model of Pase-locked loop.Firstly,principle of Costas loop and mathematic model are presented.Secondly,matlab program is used to achieve the software simulation.Finally,in Quartus Ⅱ+ModelSim environment,VHDL language is used to implement the algorithm.Simulation and experimental results show that high performance can be achieved using this kind of all-digital Costas loop.
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