光记录通道的眼图分析

Eye Diagram Analysis in the Optical Recording Channel

本文在一维光记录读出信号模型的基础上，分别对脉冲位置调制（ＰＰＭ）记录和脉冲宽度调制（ＰＷＭ）记录读出信号眼图的高度进行分析，从而发现适合两种记录方式的游程长度受限码（ＲＬＬ）．该方法可论证：（２，７）码适用于ＰＰＭ格式，而（１，７）码适合ＰＷＭ格式．

On the basis of one dimension model of the optical recording readout signal,theeye diagram'S height in Pulse Width Modulation recording and Pulse Position Modulation recording is analyzed respectively so as to find effective RLL code. With this method,it can be provedthat the (2, 7) code is suitable for PPM recording and (1, 7)code for PWM recording.