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传统的八进制不能完美的调解键空光信号,因此马赫-曾尔延时利用检查模块的工作原理,对八进制的相移控制格式进行了改革。在这改革中,其改革方案非常有意义,能够将产差分八进制移到键控光信号中进行调解。之后采用调解方法对单信道中差分八进制相移键控调制格式中的色散和非线性传输性能进行分析研究。经分析研究结果显示其他低进制的调制格式的色散容忍度会低于差分八进制相移键控。其线性容忍度会比差分二进制相移键控和差分四进制相移键控,不过,普通的二进制幅度键控会比其要低。
The traditional octal system can not perfectly reconcile the key optical signal, so the Mach-Zehnder delay uses the working principle of the checking module to reform the octal phase shift control format. In this reform, its reform program is very meaningful, able to produce differential octal shift keying optical signal for mediation. After that, the dispersion and non-linear transmission performance in single octave differential phase-shift keying (QPSK) modulation schemes are analyzed by using the mediation method. The results of the analysis show that the dispersion tolerance of other low-bit modulation formats is lower than that of differential octal phase shift keying. Its linear tolerance will be worse than differential binary phase shift keying and differential quaternary phase shift keying, however, ordinary binary amplitude keying will be lower than it.