Research on Coherent Detection Technology of 100G Optical Energy Signal Based on FPGA Design

Abstract

Blind reception of optical communication signals is also called non-cooperative
reception. It is mainly from the perspective of a third party, under the condition of lack
of prior information, to conduct a detailed analysis of the interception of the signals of
the receiving and sending parties of the system and It can also play a role in restoring
communication information. To a certain extent, the blind reception of optical
communication signals usually requires more processing procedures to achieve the
restoration of information data. In these processes, on the one hand, it is necessary to
detect the frequency position of the communication signal. With the rapid development
of my country's communication system, in order to improve the effective utilization of
spectrum resources, relevant researchers have a relatively large span in the frequency
pool of the communication system. Another aspect is that in a frequency band where a
variety of communication signals are distributed, to realize the detection of
communication signals, it is necessary to carry out real-time detection of signals in a
wide frequency band. Therefore, broadband spectrum detection is also the main
problem of blind reception of optical communication signals. Finally, the blind
reception of optical communication signals requires, to a certain extent, the modulation
parameters and types of specific signal data from the separated narrowband signals.
The automatic identification of modes is the focus of long-term research in fields such
as optical communication spectrum management.