Subcarrier multiplexing optical network uplink transmission system based on filter multi-carrier modulation

Abstract

The present invention provides a subcarrier multiplexing optical network uplink transmission system based on filter multi-carrier modulation, which includes a sequentially connected access control module, a filter-based multi-carrier modulation module, a subcarrier modulation module, a multiplexing module, and a feeder Type optical fiber, optical amplifier, demultiplexing module, photodetector, subcarrier demodulation module, uplink data receiving module. In the present invention, the data generated by the access control module is modulated by a filter-based multi-carrier modulation method, and the modulated user data is modulated to different optical sub-carriers by using the radio frequency sub-carrier modulation of the optical carrier for transmission. The data of the unit is multiplexed to the upstream fiber channel. The present invention utilizes filter-based multi-carrier modulation technology combined with sub-carrier multiplexing technology to make efficient use of uplink spectrum resources, and at the same time has good performance against inter-symbol interference and inter-subcarrier interference between uplink users, thereby supporting Higher transmission rate and spectral efficiency.

Description

technical field [0001] The invention belongs to the technical field of optical communication, and in particular relates to a subcarrier multiplexing optical network uplink transmission system based on filter (group) multi-carrier modulation technology. Background technique [0002] With the deployment and implementation of the State Council's "Broadband China" strategy, broadband has become the country's strategic public infrastructure for the first time. At present, the development of broadband Internet is changing with each passing day. With the deepening of the "three-network integration" strategy, operators' broadband networks will face a transformation from low-bandwidth requirements, non-real-time, fixed service access to ultra-high bandwidth requirements, real-time multi-service platform service system evolution. As a pipeline for network transmission, in order to cope with the rapid growth of uplink access bandwidth, optical networks are facing unprecedented pressur...

AI Technical Summary

Problems solved by technology

Obviously, although this paper realizes the transmission of uplink and downlink heterogeneous network signals, the waste of spectrum efficiency is serious, and the advantages of subcarrier modulation are not well utilized.

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