Dissertation > Excellent graduate degree dissertation topics show

Researches on the Super Forward Error Correction Concatenated Code for Optical Transmission Systems

Author: ZhangBen
Tutor: YuanJianGuo
School: Chongqing University of Posts and Telecommunications
Course: Physical Electronics
Keywords: The optical transmission system Concatenated code Super FEC Net coding gain BER
CLC: TN929.1
Type: Master's thesis
Year: 2010
Downloads: 83
Quote: 0
Read: Download Dissertation

Abstract


Forward error correction (FEC) coding technology by adding a small amount of redundant information in the signal to detect and correct bit error, thereby reducing the receiving end of the optical signal-to-noise ratio tolerance, to improve the system bit error rate, improve system reliability, extend the transmission distance, while reducing system cost. Which is currently widely used in the optical transmission system. But with the increasing development of optical transmission technology, optical fiber transmission effects (such as chromatic dispersion, polarization mode dispersion (PMD) and nonlinear effects will seriously affect the transmission rate and transmission distance further improve this, people continue to research and development better performance, the new super FEC code type, so that the higher net coding gain (NCG) and better error correction performance to meet the needs of the development of high-speed optical transmission systems and avoid the implementation of expensive equipment and complex dispersion compensation technology etc. In the super FEC implementations, since the concatenated codes with a strong correcting burst random error correction capability, therefore, it is the main object of study of the optical transmission system efficiency encoding This article for the optical transmission system Super strong FEC concatenated codes the pattern alternatives can be explored. the super FEC encoding technology is the main object of study, one of the 2003 National -863 ‖ major scientific and technological projects - optical fiber communication innovations ‖ This topic is national -863 ‖ major projects (Project No.: 2A001AA122012)-WDM ultra-long-haul optical communication technology Research and Implementation ‖ application background to carry out the study of this work the following conclusions: 1 optical transmission system noise analyzed, establishing the optical transmission system of the channel model: additive white Gaussian noise (AWGN) letter tract, and on the basis of the letter tract model of conduct the bit error rate (BER) analysis. Further on Properties of impact FEC pattern mainly parameters discussed, the proposed FEC code type in the optical transmission system construction method and from the point of view of tectonic pattern and error correction performance analysis of the theory of linear block codes, cyclic codes and BCH codes and RS codes by comparative analysis. concatenated code based on the pattern of several existing concatenated codes, redundancy and error correction performance is discussed. proposed adding interleaver concatenated codes using iterative decoding techniques is to improve the error correction performance of the existing cascade code pattern one of the ideal solution. 3 Analysis of the two kinds of the optical the Concatenated Code characteristics in a transmission system and the ITU-T G.975.1 super FEC concatenated codes interleaved concatenated codes proposed a novel super FEC pattern: RS? 2 55,239? BCH? 2 040,1930?, simulations show that the concatenated codes with ITU-T G.975.1 RS (255,239) CSOC (k0/n0 = 6/7, J = 8) code compared with lower redundancy and better error correction performance, and after three iterations, BER of 10-12 net coding gain (NCG (2040,1930) code and the RS (255,239) CSOC) than the ITU-T G.975.1 BCH (3860,3824) BCH (k0/n0 = 6/7, J = 8) code respectively 0.45dB and 0.48dB than RS (255,239) big 2.81dB and therefore it is more suitable for ultra-high-speed, large capacity and ultra-long haul optical transmission system and explore the design and implementation of the cascading pattern.

Related Dissertations

  1. Research on Ad Hoc Network Routing Protocol Base on Quantum Search Algorithm,TN929.5
  2. Research on the Nonlinear Effects of DPSK Optical Fiber Communication Systems,TN929.11
  3. A Beamforming Algorithm Based Relay Matrix,TN929.5
  4. Cooperative communication network technology research cooperative relay node selection,TN929.5
  5. Complex three-dimensional electrode - Removal of biofilm reactor Experimental Study of nitrate in drinking water,X703
  6. \,V520
  7. Design and Realization of Host Computer for Burst Error Tester Based on LabVIEW.,TP274
  8. Research on Key Technologies of DVB-C Transmission System and Its Error Analysis,TN949.197
  9. Research on Key Techniques of Frequency-Hopping Communication System,TN914.41
  10. Performance Analysis and Research of Frequency-hopping Multiple-access Communications System with OFDM Scheme,TN919.3
  11. Research on the Chaotic Spread Spcetrum Signals Blind Estimation Algorithm and the Design of Ranging Scheme,TN914.42
  12. Research on Adaptive Narrowband Suppression Techniques in Spread Spectrum Communication Systems,TN914.42
  13. Multi-user cooperative communications networks and performance study,TN915.0
  14. Energy Efficiency in Cooperative Communication,TN92
  15. The Base Excision Repair Functional Investigation of the Mutant DNA Polymeraseβ in Human Gastric Cancer Tissue,R735.2
  16. Research and Application of LDAP Message Encoding and Decoding Based on BER,TP311.13
  17. Research on Transmission Characteristics of Atmospheric Laser Communication System,TN929.1
  18. Research of Precoding in LTE and Its Evolution Versions,TN929.5
  19. The Design and Research of Performance of Signature Code for OCDMA System,TN929.533
  20. Turbo Codes Based on Chaotic Mapping DRP interleaver design and related performance analysis,TN911.22
  21. Time coding MIMO communication system precoding hollow Research,TN919.3

CLC: > Industrial Technology > Radio electronics, telecommunications technology > Wireless communications > Lightwave communications, laser communications
© 2012 www.DissertationTopic.Net  Mobile