Dissertation > Excellent graduate degree dissertation topics show

Design of High-Speed Power-line Communication Based on OFDM Technology

Author: GuWei
Tutor: PengJiHu
School: Tsinghua University
Course: Electronic Science and Technology
Keywords: Power Line Carrier Communication OFDM Synchronous PAPR Channel estimation
CLC: TN915.853
Type: Master's thesis
Year: 2005
Downloads: 426
Quote: 1
Read: Download Dissertation

Abstract


With the increasing development of communication technology, the increasing demand for high-speed digital communications. How to achieve internet access, as well as how to achieve within the family network has become a hot research problem. Unique advantages due to the power line communication, more and more researchers began to study how to achieve high-speed digital communications through power lines, the industry has also been launched on the power line communication protocol home plug 1.0. Now, however, not yet mature powerline communication products come out. Based on the above background, this paper analyzes the characteristics of the power line channel channel, and based on the characteristics of the power line channel a high-speed power line carrier communication system based on OFDM technology. OFDM (orthogonal frequency division multiplexing) is a multi-carrier communication system, the basic idea is to convert the high-speed serial data stream of string and a low-speed parallel sub-data stream, thereby increasing the duration of the entire OFDM symbol, can effectively resist the inter-symbol the crosstalk (ISI) caused by the multipath channel. Currently, OFDM is a widely used in the field of high-speed digital communications such as DVB, DAB, WLAN technology. OFDM system, there are also the following problems: The system is very sensitive to frequency offset system PAPR. This paper presents the design of the OFDM system, given the structure of the entire system, and gives the system the choice of parameters. Meanwhile, this paper analyzes the baseband digital signal processing of the entire system in a few key algorithm: synchronization, channel estimation and equalization PAPR suppression and channel codec. The paper, based on the two-dimensional pilot symbol channel estimation and equalization method: DFT-based channel estimation method in the time domain using a linear interpolation method for channel characteristic estimation in the frequency domain. In this paper, a frequency-based training sequence synchronization algorithm: the system uses short training sequence time synchronized and get the system frequency offset coarse synchronization; further fine synchronization of the system frequency offset using long training sequence; and use of data symbols pilot Partial correction. This article uses the A-law compression expansion algorithm processing OFDM system, reduce the PAPR value of OFDM system. In the channel codec, the system uses a cascade of RS code and convolutional code encoding method for error correction. Finally, Synopsys, Inc. The the CCSS software simulation environment, the performance of the whole system simulation, and get a good system performance.

Related Dissertations

  1. Research on Synchronous Acquisition and Processing System Detecting Defocus Signal Based on DSP,TH741
  2. Simulation Research on Compound-Structure Permanent-Magnet Synchronous Machine System Used in Hybrid Electric Vehicles,TM341
  3. Research on High Efficiency Interior Permanent Magnet Synchronous Motor,TM341
  4. Synchronization and Channel Estimation Algorithm in Bursted OFDM System and Its Implementation on FPGA,TN919.3
  5. The Technology Research on Channel Coding and Channel Estimation in MC-CDMA Systems,TN929.533
  6. The Research of Decoding Algorithm for Statistical Machine Tranlation,TP391.2
  7. Development of Pxibus High Performance Digital I/O Module,TP274
  8. The Research on Reliability of Low-Voltage Power Line Communication,TM73
  9. Polycyclic aromatic hydrocarbons degradation of the growth characteristics of bacteria in soil remediation,X172
  10. A Study of the Methods to Reduce Peak-to-average Power Ratio of MIMO-OFDM System,TN919.3
  11. Research on Sidelobe Suppression for NC-OFDM Systems,TN919.3
  12. Research on Channel Estimation Technique in OFDM System,TN919.3
  13. A Project about Intergrative Control System of Elevator Drive and Power Feedback,TP273
  14. The Anti-interference Research of Cell in LTE System,TN929.5
  15. Research on the Reduction of Peak to Average Power Ratio in SLM OFDM Systems,TN919.3
  16. Research on the Peak to Average Power Ratio Reduction for OFDM System by BFGS,TN919.3
  17. Study on Frequency Offset Estimation in High-Speed Mobile Environment,TN919.3
  18. Research on PAPR Technology of Wavelet Packet Multicarrier Modulation System,TN919.3
  19. Study on the Related Parameters of High-Speed Mobile Channel,TN919.3
  20. Study on the High-Speed Mobile Channel Estimation,TN919.3
  21. Research and Design of Electronic Equalization Based on Most Likelihood Sequence Estimation,TN911.5

CLC: > Industrial Technology > Radio electronics, telecommunications technology > Communicate > Communication network > Private communication network > Electric Power Communication Network
© 2012 www.DissertationTopic.Net  Mobile