理解无码间串扰的条件；利用matlab仿真，验证无码间串扰的条件，画出相关波形及眼图，并画出有噪声时的误码率特性曲线；对仿真结果进行性能分析

-Understand the inter-symbol interference-free conditions　using matlab simulation, verification without inter-symbol interference conditions, draw relevant waveforms and eye diagram, bit error rate characteristic curve and draw when there is noise　performance analysis of simulation results