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

A wireless system, millimeter wave technology, applied in the directions of optical fiber radio, radio transmission system, electromagnetic wave transmission system, etc., can solve the problems of complex system structure, dispersion attenuation, and high system cost, to simplify the system structure, solve the attenuation problem, and increase transmission. effect of distance

Inactive Publication Date: 2009-04-29
BEIJING JIAOTONG UNIV
View PDF2 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problems to be solved by the present invention are the problems of high system cos

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • System for implementing uplink downlink wavelength reusing based on millimeter wave generator
  • System for implementing uplink downlink wavelength reusing based on millimeter wave generator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] The present invention will be further described below in conjunction with the accompanying drawings.

[0025] Such as figure 2 , the system based on the millimeter wave generator to realize the wavelength reuse of the uplink and downlink of the optical fiber wireless system, the system is composed of a central station 92, a base station 91, and a transmission optical fiber.

[0026] The millimeter wave generator 90 used in the present invention was applied on October 31, 2008, the application number is 200810025447.3, and the name is "a microwave and millimeter wave generator based on a double fiber grating structure". The output of the first fiber grating 50 is end is connected to the first port 421 of the third optical circulator 42, and the second port 422 of the third optical circulator 42 is connected to the input end of the third fiber grating 52; the output end of the second fiber grating 51 is connected to the fourth optical circulator 43 The first port 431 of...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

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 ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H04B10/12H04B7/00H04B10/2575
Inventor 吴树强裴丽宁提纲祁春慧郭兰
Owner BEIJING JIAOTONG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap