Unlock instant, AI-driven research and patent intelligence for your innovation.

Direct detection optical fiber communication system and communication method based on many-to-one mapping PS-PAM4

A technology of PS-PAM4 and optical fiber communication system, which is applied in the direction of optical fiber transmission, transmission system, electromagnetic wave transmission system, etc., can solve the problem of decreased receiving sensitivity and achieve the effect of improving spectrum utilization

Inactive Publication Date: 2019-09-24
HUAQIAO UNIVERSITY
View PDF4 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the optical fiber transmission system, the directly detected signal is affected by the nonlinear effect of the optical fiber, and the receiving sensitivity is greatly reduced.

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
  • Direct detection optical fiber communication system and communication method based on many-to-one mapping PS-PAM4
  • Direct detection optical fiber communication system and communication method based on many-to-one mapping PS-PAM4
  • Direct detection optical fiber communication system and communication method based on many-to-one mapping PS-PAM4

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0046] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0047] In order to solve the problem in the prior art that the directly detected signal is affected by the nonlinear effect of the optical fiber in the optical fiber transmission system and the receiving sensitivity is greatly reduced, the present invention provides a four-stage pulse amplitude modulation PS- PAM4 direct detection fiber optic communication systems such as figure 1 As shown, it includes a data generation module, a probability shaping module, a PS-PAM4 modulation module, a transmission module, a PS-PAM4 receiving module, an equalization module and a decoding module connected in sequence.

[0048] The data generation module generates a pseudo-random binary bit stream PRBS, and encodes the PRBS with a low-density parity check code LDPC to obtain binary information according to a probability codebook. The probability shaping modul...

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 relates to a direct detection optical fiber communication system and a communication method based on many-to-one mapping probability shaping four-stage pulse amplitude modulation PS-PAM4. Based on a probability codebook generated offline, the binary information is subjected to many-to-one mapping according to the probability codebook, and then digital-to-analog conversion, transmission, optical / electric conversion and analog-to-digital conversion, de-mapping and decoding inspection are carried out to complete direct detection optical fiber communication. Shaping gain can be obtained, and the spectrum utilization rate of optical fiber communication is improved.

Description

technical field [0001] The present invention relates to digital modulation technology in the field of optical fiber communication, more specifically, to a direct detection optical fiber communication system based on many-to-one mapping PS-PAM4, and a four-level pulse amplitude modulation PS based on many-to-one mapping probability shaping - PAM4's direct probe fiber optic communication method. Background technique [0002] With the growth of users' demand for transmission, optical fiber communication, as a long-distance and large-capacity transmission method, has become the main direction of communication. [0003] The four-level pulse amplitude modulation PAM4 signal has great advantages in short-distance, high-speed optical fiber transmission systems due to its simple implementation and low computational complexity. The combined application of PAM4 and direct detection technology can reduce cost and energy consumption. However, in the optical fiber transmission system, t...

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
Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/25H04B10/524H04B10/54
CPCH04B10/524H04B10/541H04B10/25891
Inventor 董泽肖庆华吴新星陈逸凡
Owner HUAQIAO UNIVERSITY