Dissertation > Excellent graduate degree dissertation topics show

Design of VAR Multi-services Optical Transmission and Switching Integrated System

Author: ShaoHaiFeng
Tutor: ShiXuGang
School: Zhejiang University of Technology
Course: Communication and Information System
Keywords: clock synchronization delay variety buffer size statistical-averaging algorithm least square linear regression algorithm weighted average algorithm
CLC: TN929.1
Type: Master's thesis
Year: 2007
Downloads: 2
Quote: 0
Read: Download Dissertation

Abstract


VAR multi-services optical transmission and switching integrated system can satisfy the requirement of future monitoring system. It can replace many equipments in traditional monitoring system, and it is very simple and useful.The backgrounds, principle and some important technologies are described in the thesis. The clock synchronization of VAR is studied as emphases, and it is divided into two parts for designing. SDH technologies are used in VAR transmission and switching integrated network, and adaptive synchronous algorithm is used between VAR center and terminal.During the study of synchronization between VAR center and terminal, delay variety of packets network which between VAR center and terminal is measured, and the result shows that the delay variety of packets network is very small. So the adaptive synchronous algorithm for clock recovery can be used at terminal. Then the thesis analyzes the adaptive synchronous algorithm[18] in detail. And introduces Least Square Linear Regression based clock recovery algorithm at terminal. The algorithm has the ability to filter out buffer level flucation efficiently and remove the negative contribution of delay jitter in clock recovery. The new algorithm enables the terminal clock to be synchronized with the VAR center more accuracy. The thesis also try to adopt weighted average algorithm to smooth the packet jitter, and analyses performance of the algorithm. The algorithm is implemented on FPGA circuit board. At last, a new scheme about detection and processing of packet lost is gived in thesis.

Related Dissertations

  1. Research and Realization of Precision Clock Synchronization Protocol,TP393.11
  2. EPL Industrial Ethernet real-time strategy and its application in the SOE system,TP273
  3. The Design of ZigBee Wireless Sensor Network with Precision Time Synchronization,TP212.9
  4. Predictive control network control system based on delay estimates,TP273
  5. Study on Time Synchronization and Network Optimization in Wireless Sensor Networks,TP212.9
  6. Distributed virtual target test system real-time data communication and management technology research,TP273
  7. Quantum Algorithms’ Analyses and Physical Realizations,O413
  8. Research and Implementation of Positioning Technology Based on Wireless Sensor Network,TP212.9
  9. Studies and Developments of Time Synchronization of Wireless Sensor Networks,TP212.9
  10. Study on Time Synchronization Method for Urban Lighting Management System,TM923
  11. Network Clock Synchronization and Its Security,TP316.4
  12. Clock Synchronization and Stability Analysis Based on Clock Drift Rate,TP316.4
  13. Based on IEEE802.11a OFDM synchronization algorithm research protocol,TN925.93
  14. Clock Synchronization Algorithm in Distributed System Based on CAN Bus,TP273.5
  15. Clock Synchronization Based on Clock Precision Difference and Wavelet,TP316.4
  16. Authentication and Security in Light-weight Drop-and-Go Networks,TP393.08
  17. Efficient energy constrained wireless sensor networks division mechanism,TP212.9
  18. The audio transmission system based on the Ethernet,TP393
  19. A Study on Signal Processing and Fieldbus Technology for Intelligent Vortex Flowmeter,TH814
  20. Design and simulation of the DVB-T demodulator synchronization module,TN76

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