基于 MATLAB 的眼图仿真——及其与通信实验箱之结果的比较摘要通信实验往往可以从硬件和软件两方面着手设计，并加以横向比较，从而达到更深刻地理解和领悟通信理论原理的目的。本设计选取眼图为讨论对象。可靠性是通信系统的重要指标之一,而眼图是定性衡量传输系统可靠性能-—码间串扰大小及受信道噪声的影响等-—的方法，简单直观；除了用通信实验箱实现眼图的观察外,软件仿真具有前者所不具备的优点，本设计以 MATLAB 为主要工具实现了眼图的仿真模拟。硬件方面使用北京掌宇金仪科教仪器设备有限公司生产的 TIMS-301 F 系列实验系统，只需较少的模块就能完成眼图的实现,缺点是灵活性不够;MATLAB 由初始的矩阵实验室进展成一款具有广泛用途的科学实验软件，在通信系统仿真方面是有效而便捷的.MATLAB 本身内置功能强大的函数库和讲解详细的帮助文档,前者使得眼图的仿真更加高效。眼图仿真考虑了以下几方面因素的影响：调制数字信号的方式、传输系统（滤波)、信道噪声及其大小等等；给出了 MATLAB 语言编程和 Simulink 动态建模两种眼图的实现方式，通过仿真有效的验证了眼图推断噪声大小、系统性能的有效性，并尝试了通过眼图调整通信系统的抗干扰能力。关键字：通信系统,眼图，仿真，MATLABSimulation of Eye DiagramBased on Matlab—-＆ Comparison with the rusult of TIMSAbstractExperiment in communication system can often be coducted on hardware as well as by sofeware， and bydrawing comparison with each other,the principles of the theories in communication system could be understood more deeply and properly . The Eye Diagram was chosed to be studied in this design. The reliability is one of the most important indexes in evaluating the performance of a communication system. Eye Diagram is such a tool to observe the performance of communication systems. By using an Eye Diagram， the magnitude of the noise and the Intersymbole Interference （ISI) could be diagnosed by and large。Two methods were employed to achieve the Eye Diagram。 One was theTIMS—301Fteaching & experimental system， which is simple but inflexible； t...
