相干解调是指利用乘法器，输入一路与载频相干（同频同相）的参考信号与载频相乘。　因此相干解调需要接收机和载波同步；-demodulation algorithm

一种32Gb的多载波数字相干光链路，频谱效率高，设计简单实用-One kind of 32Gb multi-carrier digital coherent optical links, high spectral efficiency, the design is simple and practical