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

Optical communication high-performance information transmission system based on IM/DD

An information transmission, high-performance technology used in the field of optical communications

Pending Publication Date: 2022-08-05
NORTHEAST NORMAL UNIVERSITY
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, in the communication network based on artificial intelligence, the transmission and processing of massive data also brings further challenges to operators

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
  • Optical communication high-performance information transmission system based on IM/DD
  • Optical communication high-performance information transmission system based on IM/DD

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Embodiment 1 A high-performance CFMO-OFDM transmission scheme for optical communication based on IM / DD

[0051] The structural block diagram of the proposed CFMO-OFDM transmission scheme is shown in figure 1 shown. For a frame length of N The data modulation L Floor Asymmetrically clipped O-OFDM (ACO-OFDM). The first layer of ACO-OFDM occupies odd carriers, the second layer occupies the odd part of the remaining carriers, and so on. is the first l Floor The occupied subcarriers can be expressed as: .

[0052] Apply Hermitian symmetry to each layer, and then modulate as many as possible on one frame of data, you can get:

[0053] (1)

[0054] in, represents a conjugate operation;

[0055] means the first l Carriers occupied by layer ACO-OFDM.

[0056] By applying inverse fast Fourier transform (IFFT) to the frequency-domain symbols obtained by formula (1), a bipolar real-valued time-domain signal can be obtained:

[0057] (2)

[0058] At this ...

Embodiment 2

[0081] Embodiment 2 A receiving end for IM / DD-based optical communication high-performance CFMO-OFDM information transmission,

[0082] is a Re0 receiver suitable for CFMO-OFDM; such as figure 1 As shown in the receiving part of an inherent 0 value. However, due to the noise generated in the transmission process, these inherent zero values ​​will be distorted and shifted to their original positions, and the purpose of denoising can be achieved by finding the positions of these zero values.

[0083] Following the signal generation process, the received signal is After performing analog-to-digital conversion, serial-to-parallel conversion, and removing the cyclic prefix, perform the cycle division operation:

[0084] (10)

[0085] Then perform the column minimization operation on equation (10), and remember the corresponding position, then determine the position as the original 0 value position, and return it to 0 to obtain the processed signal . In the case where th...

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 an IM / DD-based optical communication high-performance information transmission system. According to a transmitting end, a non-clipping signal generated by multiple layers of orthogonal amplitude modulation symbols and periodic direct current bias are superposed in a time domain. While the transmission requirement based on IM / DD is met, signal generation and demodulation are realized by adopting single inverse fast Fourier transform and fast Fourier transform respectively. On the premise of avoiding negative clipping, the periodic direct current bias of the transmitter raises the power efficiency of the system as much as possible. And negative clipping and interlayer interference do not exist. At a receiving end, a receiver based on a zero value regression thought is provided to optimize symbol demodulation precision. A numerical simulation result shows that the scheme can improve the bit error rate performance on the premise of lower system complexity. Finally, the scheme has a relatively low peak-to-average ratio, so that the method has relatively good robustness for nonlinearity of the system, and has a good application prospect in the field of optical communication.

Description

technical field [0001] The invention belongs to the technical field of optical communication, and in particular relates to an IM / DD-based optical communication high-performance CFMO-OFDM transmission system. Background technique [0002] The information age vision of high capacity, high speed, and low latency places new demands on existing communication models. In addition, the transmission and processing of massive amounts of data in AI-based communication networks poses further challenges for operators. Therefore, in order to achieve a more efficient, stable, reliable and low-latency connection mode (ie, access point), in recent years, in the fields of VR, AI, and deep learning-based communication technologies, such as computing power network, cloud network collaboration, The layout of emerging technologies such as the integration of space and earth. [0003] Optical communication using light waves as an information carrier has always been a hot topic in the field of com...

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): H04L27/26H04B10/516
CPCH04L27/2614H04L27/2628H04L27/2626H04L27/265H04L27/2647H04B10/5161
Inventor 张天王宏旭
Owner NORTHEAST NORMAL UNIVERSITY
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