W-band broadband millimeter wave full-duplex access method and system based on local oscillator broadcasting

Abstract

The invention discloses a W waveband broadband millimeter wave full duplex access method and system based on local oscillation broadcasting. In a central station, N downlink data generation modules generate N SSB signals, a sharing local oscillation generation module generates W waveband light local oscillations, and wavelength division multiplexing is carried out on the N SSB signals and the light local oscillations, and the N SSB signals and the light local oscillations are transmitted to far-end nodes. After demultiplexing is carried out on the far-end nodes, each path of signals are regrouped into a light local oscillation and an SSB signal, and local oscillation broadcasting is achieved. Nonlinear interaction is carried out various paths of signals trough SOAs to generate multi-idler-frequency-light, carrier waves in the SSB signals and certain idler frequency light carrying signals with frequency space within a range of 75-110GHz with the SSB signals are coupled to be transmitted to a base station, beat frequency is carried out, and W waveband radio frequency electrical signals are generated. In the base station, a part of carrier waves in down links are extracted through fiber bragg gratings to serve as carrier waves of uplink signals. Wavelength division multiplexing is carried out on the uplink signals after modulation on the far-end nodes, the uplink signals are transmitted to the central station, and a full duplex RoF link is completed.

Description

technical field [0001] The present invention relates to the fields of optical communication and millimeter wave communication, and in particular to a full-duplex network architecture for realizing optical domain processing of W-band millimeter wave signals and long-distance transmission through optical fibers using WDM-PON-based RoF technology and local oscillator broadcasting technology . Background technique [0002] In recent years, with the rapid development of communication technology, the business scope of communication has been continuously expanded, and people's requirements for the transmission capacity of communication networks have been continuously improved, which makes the transmission network develop towards the direction of wavelength division multiplexing transmission based on optical fiber switching. [0003] Wavelength Division Multiplexed Passive Optical Network (WDM-PON) uses wavelengths to identify ONUs at the user end. It has the advantages of protocol ...

AI Technical Summary

Problems solved by technology

Secondly, with the increase of SSB optical millimeter-wave frequency, the idle spectrum between the two optical frequency components also increases, and the utilization efficiency of optical fiber spectrum resources decreases.

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