Dissertation > Excellent graduate degree dissertation topics show

The Research of Peak to Average Ratio in OFDM System

Author: LiHao
Tutor: ZengXingZuo
School: Xi'an University of Electronic Science and Technology
Course: Communication and Information System
Keywords: OFDM Peak-to-average power ratio Interleaving limiter Companding
CLC: TN919.3
Type: Master's thesis
Year: 2006
Downloads: 43
Quote: 0
Read: Download Dissertation

Abstract


Orthogonal frequency division multiplexing (OFDM) is a multicarrier transmission scheme , which uses a plurality of mutually orthogonal sub - carriers to transmit information . OFDM high spectrum efficiency, and anti-multipath fading ability , it has been widespread concern , has been applied to broadcast audio , video and wireless technology other high - rate data transmission communication systems . However , due to the output signal of the OFDM system is a superposition of the plurality of sub- carrier signal , thereby generating a high peak to average power ratio problem , and it may cause interference between subcarriers , greatly reduce the performance of OFDM systems , and this has become an obstacle to the OFDM system a major obstacle in the application . Therefore , in order to avoid the emergence of non-linear distortion , this article is to reduce the PAPR discussion . The paper introduces the basic principles of OFDM system , composed of key technologies , OFDM systems , peak-to-average power ratio (PAPR) of the system , and the statistical distribution of the PAPR characteristics . Classification method in accordance with the signal distortion , the encoding method and signal scrambling method summarizes the results of previous studies , a brief explanation of the working principle and characteristics of the various methods , proposed on the basis of the analysis and comparison of the factors to be considered in the selection method . Paper μ-law companding method to reduce the PAPR of OFDM system have been studied and discussed different parameter selection on the the companding method of performance impact . Threshold averaging C transformation method in addition to the traditional methods , further research , and through the simulation , which companding parameter selection problem discussed . This paper proposes a new interleaver limiting method to reduce the PAPR . The the limiter method and the principle and design of interleaver simulation platform is built using Matlab software simulation method validation , a comparative analysis of simulation results with similar systems , show that the limiting new interleaver reducing the PAPR of the system , the system performance is effectively improved.

Related Dissertations

  1. Synchronization and Channel Estimation Algorithm in Bursted OFDM System and Its Implementation on FPGA,TN919.3
  2. The Research on Reliability of Low-Voltage Power Line Communication,TM73
  3. Research of Channel Estimation Based on Pilot for MIMO-OFDM System,TN919.3
  4. Research of Adaptive OFDM Modulation and Demodulation Project Based on Coal Mine Communication,TN919.3
  5. Study on Synchronization for OFDM System Based on IEEE 802.11a,TN919.3
  6. Study of OFDM/OFDMA Sychronization Technique in the Physical Layer of WIMAX,TN929.5
  7. Channel Parameter Estimation Algorithms for OFDM Systems,TN919.3
  8. Hopping OFDM system performance and synchronization technology and simulation,TN919.3
  9. A Study of Oblique Projection and Its Application in Blind Channel Estimation,TN911.5
  10. OFDM-MIMO Physical Layer Simulation for IEEE802.11N,TN919.3
  11. Efficient FFT Cognitive Radio Networks clipping algorithm,TN925
  12. Throughput Analysis for Adaptive Transmission Cognitive Radio,TN925
  13. Reduceing Papr of OFDM System Based on SLM and Constellation Mapping,TN919.3
  14. The Research on Signal Detection and Parameter Estimation for OFDM System with Antenna Array,TN919.3
  15. Research on the Decoding Algorithms of LDPC and Performance Analysis,TN911.2
  16. Optimization and Implementation for Key Technologies in MIMO-OFDM Transceiver,TN919.3
  17. Study on the Technology of OFDM in Aircraft TT & C System,TN919.3
  18. Research on Cyclostationary Signature Detection Algorithm of Cognitive Radio,TN925
  19. 802.16 physical layer based OFDM system simulation and key technology research,TN919.3
  20. Research on LTE Cell Search and Downlink Synchronization Process,TN929.5
  21. Study of Antenna Selection Technologies im MIMO-OFDM System,TN919.3

CLC: > Industrial Technology > Radio electronics, telecommunications technology > Communicate > Data communication > Data transmission technology
© 2012 www.DissertationTopic.Net  Mobile