OTDR中伪随机码应用的新方法

Pseudorandom Code Application in OTDR

分析了OTDR中利用伪随机码进行测量时旁瓣产生的原因 ,提出一种新方法———周期伪随机码 .其特点在于连续周期性发射并接收普通伪随机码信号 ,在满足一定条件下 ,可以像互补码一样消除不规则旁瓣对测量的影响 ,但比互补码所需的测量时间和计算量更小 .

Reasons why side-lobes are caused when using pseudorandom codes in OTDR are given. A new method using periodicity pseudorandom codes is presented. Periodicity pseudorandom codes are continuously transmitted and their refection in optical fiber received.It can cancel the effect of side-lobes under certain conditions.The new method has quick measurement response and less computation burden compared with supplement code method.