Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

System adopting phase diversity receiving technology to receive coherent light orthogonal frequency division multiplexing access signals

A technology of orthogonal frequency division and phase diversity, which is applied in the field of new optical access systems, can solve the problems that the receiving performance needs to be further improved and improved, and achieve technical feasibility, resistance to fiber dispersion and polarization mode dispersion, and convenient implementation Effect

Inactive Publication Date: 2013-11-27
CHONGQING THREE GORGES UNIV
View PDF3 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the optical carrier self-extraction OOFDM signal scheme proposed in the industry (Lei Xu, Junqiang Hu, Dayou Qian, et al. Coherent Optical OFDM Systems Using Self Optical Carrier Extraction. Proc.OFC'08, OMU4 (2008)) has certain The ability to resist the negative effects of fiber dispersion and polarization mode dispersion, but its receiving performance needs to be further improved and improved

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 adopting phase diversity receiving technology to receive coherent light orthogonal frequency division multiplexing access signals
  • System adopting phase diversity receiving technology to receive coherent light orthogonal frequency division multiplexing access signals
  • System adopting phase diversity receiving technology to receive coherent light orthogonal frequency division multiplexing access signals

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] Such as figure 1 As shown, at the transmitter, the generated data input sequence (digital signal) undergoes serial-to-parallel transformation, quadrature amplitude modulation (QAM), inverse Fourier transform (IFFT), parallel-to-serial transformation, and adding a fixed-length cyclic prefix (for 1 / 16 of the input sequence length) and digital-to-analog conversion to realize the generation of baseband OFDM electrical signals; then through the radio frequency up-conversion process, the generation of OFDM subcarrier modulation signals is completed; then the OFDM subcarrier modulation signals are modulated to obtain OFDM The electrical signal is loaded on a phase modulator 2, and the phase modulator 2 simultaneously receives the signal (laser signal) sent by the distributed feedback laser 1, and processes it to generate an OOFDM signal; the OOFDM signal is transmitted through a standard single-mode optical fiber (SMF-28 ) to the erbium-doped fiber amplifier 3, the erbium-dope...

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 invention discloses a system for adopting a phase diversity receiving technology to receive coherent light orthogonal frequency division multiplexing access signals. The system comprises a phase modulator, an erbium-doped optical fiber amplifier, an optical phase diversity receiver, a first photoelectric detector, a second photoelectric detector and a phase estimation module. The OOFDM signals after standard single mode optical fiber long-distance transmission are processed by the optical phase diversity receiver and the phase estimation module respectively, therefore, the negative effects of optical fiber dispersion and polarization mode dispersion can be effectively resisted, and the receiving quality of the OOFDM signals after long-distance transmission is improved.

Description

technical field [0001] The invention belongs to a new type of optical access system for receiving coherent optical orthogonal frequency division multiplexing (CO-OOFDM) signals by using optical phase diversity receiving technology in an optical communication network, and can be used to improve the reception of coherent optical orthogonal frequency division multiplexing (CO-OOFDM) signals performance. Background technique [0002] Orthogonal Frequency Division Multiplexing (OFDM, Orthogonal Frequency Division Multiplexing) signal, as a modulation signal with high spectral efficiency, has attracted widespread attention and interest in the field of wireless communication. In recent years, it has been found that optical orthogonal frequency division multiplexing (OOFDM, Optical OFDM) signals can effectively reduce the negative effects of dispersion and polarization mode dispersion in long-distance fiber channels, and can be applied to optical network units (ONUs) of access netwo...

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): H04B7/02H04L27/26
Inventor 邵宇丰王仕奎谭泽富罗映祥赖于树
Owner CHONGQING THREE GORGES UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com