System for implementing uplink downlink wavelength reusing based on millimeter wave generator

Abstract

The present invention relating to the fields of microwave photonics, fiber wireless communication and the like, discloses a system for realizing the re-use of uplink and downlink wavelength of a fiber wireless system on the basis of a millimeter-wave signal generator. The system comprises a central station (92), a base station (91) and a transmission fiber. The present invention solves the problems of high system cost, dispersion attenuation, complex system structure and the like existing in the re-use process of wavelengths. Uplink re-use light carriers are obtained by using the third fiber grating (52), and the downlink re-use light carriers are obtained by using the fourth fiber grating (53), therefore, wavelength re-use of the system can be realized. An output terminal of an external modulator (81) of the base station is connected with the central station (92) through a sixth fiber grating (55) and an uplink transmission fiber (9); an output terminal of an external modulator (80) of the central station (92) is connected with the base station (91) through a fifth fiber grating (54) and a downlink transmission fiber (4), and a sideband of modulating signals is filtered, therefore, the problem of dispersion attenuation is solved.

Description

technical field [0001] The invention relates to optical fiber wireless communication and microwave photon technology, and is suitable for the fields of optical fiber-wireless communication system, microwave photon, optical fiber sensing, optical fiber communication, mobile cellular communication and radar. Background technique [0002] At present, the development of mobile communication is extremely rapid. With the practical application of 3G mobile communication technology in the world, mobile wireless access is developing towards wide bandwidth and high-speed access. However, with the rapid development of mobile communications, the limitation of lack of wireless spectrum resources is becoming more and more prominent. However, frequency bands below 3 GHz, where most services are concentrated, have long been crowded, and resources in low frequency bands have almost been exhausted. In order to increase the capacity and access rate of the wireless communication system, it is ...

AI Technical Summary

Problems solved by technology

[0004] The technical problems to be solved by the present invention are the problems of high system cost, attenuation caused by dispersion, and complicated system structure in the wavelength reuse technology

Images