在信号解调中，使用锁相环可取得较好的解调信号。以调频波和调幅波为例，通过用MATLAB 编程与Simulink 现有组件两种方法对载波同步进行建模与仿真，并详细给出仿真设计原理以及合理选择仿真参数的方法。最后，对仿真 结果进行深入分析，并比较两种方法的可行性与优缺点。

In the demodulation of signal, we can get good demodulating signals by PLL. The modeling and simulation of the carrier wave are completed synchronously using two methods of MATLAB and Simulink. The specific theories of simulation and the way of choosing adapted parameters are clearly elaborated. Finally, the results of simulation are analyzed deeply, and the practicability and characters of these methods are compared