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

Enhanced optical space modulation method suitable for logarithmic normal turbulence channel

A technology of optical space modulation and logarithmic normal, which is applied in the field of wireless optical communication, can solve the problems of high laser combination redundancy and waste of space resources, and achieve the effects of low complexity, low energy consumption, and high transmission rate

Active Publication Date: 2019-10-22
LANZHOU UNIVERSITY OF TECHNOLOGY
View PDF6 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the laser combination that can be used by GSM is only a power of 2, and the redundancy of the laser combination is high, which will cause a waste of space resources

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
  • Enhanced optical space modulation method suitable for logarithmic normal turbulence channel
  • Enhanced optical space modulation method suitable for logarithmic normal turbulence channel
  • Enhanced optical space modulation method suitable for logarithmic normal turbulence channel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] In order to increase the transmission rate of the optical space modulation system, the invention proposes an enhanced optical space modulation scheme with variable number of activated lasers. Its goal is to increase the spatial domain mapping by activating one or two combinations of laser serial numbers each time, and use the characteristics of PPM modulation to map different PPM modulation symbols on different combinations, so as to ensure better bit error performance. , which greatly improves the transmission rate of the system and reduces the computational complexity of the system. The present invention will be described in detail below with specific implementation in conjunction with the accompanying drawings.

[0019] The present invention achieves through following technical measures:

[0020] For one with N t lasers (LD), N r A photodetector (PD) EOSM system, the system model is as follows figure 1 shown. exist figure 1 , the input binary information bit st...

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 enhanced optical space modulation method suitable for a logarithmic normal turbulence channel. The enhanced optical space modulation method mainly comprises the following steps: carrying out space domain mapping and signal domain mapping on a binary information block, detecting and de-mapping a received signal, and calculating an upper bound of an error rate of an enhanced optical space modulation system. The spatial domain mapping is to divide different activated laser serial number combinations into three types, and the signal domain mapping is to determine pulse position modulation symbols mapped on different types of activated lasers according to a mapping rule. the mapped signal is sent out by the optical antenna, passes through the atmospheric turbulence channel, is received by the optical antenna and then is converted into an electric signal by the photoelectric detector. The detection of the serial number of the laser and the digital modulation signalis completed by using a maximum likelihood decoding detection algorithm, and the bit information of the transmitting end is recovered after corresponding demapping. Furthermore, the upper bound of the bit error rate of the enhanced optical space modulation is derived by using a joint bound technology.

Description

technical field [0001] The invention relates to the technical field of wireless optical communication, and specifically proposes an enhanced optical spatial modulation method with a variable number of activated lasers for a logarithmic normal turbulent channel, which further improves the transmission rate and spectrum efficiency of optical spatial modulation. Background technique [0002] The traditional multiple-input multiple-output (MIMO) technology has become one of the research hotspots in the field of wireless optical communication (WOC) in the past ten years because of its large capacity and high reliability. However, its wide application in practice is limited due to its shortcomings such as strong interference between channels, high synchronization requirements between sub-channels, and complex processing of received signals. In order to achieve the high-speed, reliable, and low-energy communication goals proposed in the field of wireless optical communication, spat...

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): H04B10/516H04B10/524H04B10/50H04B7/0413
CPCH04B7/0413H04B10/503H04B10/5161H04B10/524Y02D30/70
Inventor 张悦王惠琴曹明华毛一聪马玉昆吕佳芸豆红霞
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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