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

PS-PAM4 system based on bit weighted distribution matching

A PS-PAM4, bit technology, applied in the transmission system, digital transmission system, electromagnetic wave transmission system, etc., can solve the problem of mutual information low channel capacity value, etc., to achieve the reduction of nonlinear effects, low bit error rate, high acceptance sensitivity The effect of transmission

Active Publication Date: 2020-05-19
HUAQIAO UNIVERSITY
View PDF2 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the actual PAM modulation optical communication system, due to the influence of device nonlinear effects, dispersion, fiber loss, etc., the actual transmitted optical power is limited, which will make the actual mutual information lower than the theoretical channel capacity value

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
  • PS-PAM4 system based on bit weighted distribution matching
  • PS-PAM4 system based on bit weighted distribution matching
  • PS-PAM4 system based on bit weighted distribution matching

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] The present invention will be further described below through specific embodiments.

[0029] Such as figure 1 , a PS-PAM4 system based on bit weighted distribution matching, including: data source module, bit weighted distribution matching module, LDPC encoding module, PS-PAM4 mapping module, PS-PAM4 signal modulation module, link transmission module and PS- PAM4 signal receiving demodulation module;

[0030] The data source module generates a pseudo-random binary bit stream A that obeys the Bernoulli distribution (1 / 2) as the original input signal;

[0031] The bit weighted distribution matching module changes the weight of '0' in the pseudo-random binary bit stream A that obeys the Bernoulli distribution (1 / 2) generated by the data source module by adding redundant bits to obtain the binary bit stream B; the specific implementation is: The serial pseudo-random binary bit stream A that obeys the Bernoulli distribution (1 / 2) generated by the data source module will be...

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 probability shaping four-stage pulse amplitude modulation system based on bit weighted distribution matching (BWDM). The system comprises a data source module, a bit weighteddistribution matching module, a low density parity check code (LDPC) module, a PS-PAM4 mapping module, a PS-PAM4 signal modulation module, a link transmission module and a PS-PAM4 signal receiving and demodulating module. According to the system, a pseudo-random binary bit stream is generated by a data source module, a bit weighted distribution matching module changes the weight of '0' in the pseudo-random binary bit stream, an LDPC encoding module performs LDPC encoding, and a PS-PAM4 mapping module maps the encoded binary bit stream into a PS-PAM4 symbol; the PS-PAM4 signal modulation module carries out modulation and sends modulated signals to the link transmission module; the link transmission module realizes standard single-mode optical fiber transmission of the PS-PAM4 optical signal; and the PS-PAM4 signal receiving and demodulating module performs de-mapping and inverse bit weighted distribution matching on the signal to obtain a binary bit stream. According to the system, thenonlinear effect of the signal is reduced, and low-error-rate and high-receiving-sensitivity transmission is realized.

Description

technical field [0001] The invention relates to digital modulation technology in the field of optical fiber communication, in particular to a probability shaping four-level pulse amplitude modulation (PS-PAM4) system based on bit weighted distribution matching. Background technique [0002] With the increase of users' demand for transmission, optical fiber communication relies on its advantages in high transmission bandwidth, large information transmission capacity, easy expansion characteristics, low loss transmission performance, anti-electromagnetic interference, small size, light weight, relay Excellent features such as long distances have become the mainstream of communication. [0003] Four-stage pulse amplitude modulation (PAM4) is an efficient modulation technology that uses 4 different signal levels for signal transmission. Each symbol period can transmit 2 bits of information. In terms of cost, Under the same bit rate condition, the baud rate of PAM4 is only half ...

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): H04B10/524H04B10/54H04B10/69H04L1/00
CPCH04B10/524H04B10/541H04B10/691H04L1/0058H04L1/0061
Inventor 董泽赵雪赵有娣陈逸凡
Owner HUAQIAO UNIVERSITY