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差分预编码器是光差分相移键控调制(DQPSK)中的重要组成部分.不同的光DQPSK调制方式和接收模型需要不同的差分预编码器.现有的光DQPSK传输实验往往忽略了预编码器的设计实现.通过研究光DQPSK的调制方式和接收模型,可以得出一种用来推导DQPSK预编码器逻辑表达式的方法.使用该方法,可以根据光DQPSK的调制方式和接收模型,设计相应的预编码器.
The differential precoder is an important part of the optical differential phase shift keying modulation (DQPSK) .Different optical DQPSK modulation schemes and reception models require different differential precoders. Existing optical DQPSK transmission experiments often overlook the precoding The design and implementation of the optical DQPSK can be achieved by studying the modulation and reception modes of the optical DQPSK.A method for deriving the logical expression of the DQPSK precoder can be derived.Using this method, according to the modulation and reception model of optical DQPSK, Corresponding precoders.