利用Simulink建立了两种仿真模型验证分析软件无线电中ADC孔径抖动对SNR的影响，模型一采用输入信号的抖动来仿真ADC采样孔径抖动产生的影响，模型二采用时钟源加入高斯噪声的方法较真实地模拟了ADC采样时钟的抖动情况。两种模型的仿真曲线与理论曲线基本吻合，证明了模型的正确性，尤其是模型二建模解决了有抖动的采样脉冲产生和参数计算中信号同步的关键问题，得到了更真实、准确的特性曲线，为深入研究高速高精度ADC的孔径抖动测量、分析和控制提供了一个比较可靠的依据，对系统设计提供了有益帮助。

Two simulation models are established by Simulink to verify and analyze the impact of aperture jitter on SNR in ADC in software radio. The first simulats the effect of the sampling ADC aperture jitter using the jitter of input signals, and the second simulats the ADC sampling clock jitter more accurately by adding the Gaussian noises to the clock source. The simulation curves of these two models are consistent with the theoreticalones, which verifies that the models are correct, especially for the second. It resolves two key issues, the generation of the sampling jitter pulses and the signal synchronization in parameter calculation, and more truly and accurately curves are obtained, and it provides a more reliable basis for an indepth study of measurement, analysis and control of highspeed and high precision ADCs’ aperture jitter, which is helpful in the design of the system.