Dissertation > Excellent graduate degree dissertation topics show

FPGA Design and Implementation of Channel Estimate Based on OFDM System

Author: HuangZuo
Tutor: ZhengZiWei
School: Dalian Maritime University
Course: Communication and Information System
Keywords: OFDM FPGA Channel Estimation Implementing Baseband
CLC: TN919.3
Type: Master's thesis
Year: 2009
Downloads: 264
Quote: 0
Read: Download Dissertation

Abstract


OFDM(orthogonal frequency division modulation) is regarded as the key technology for the next mobile communication system.Due to its high bandwidth efficiency and robustness against frequency selective fading channel.But the radio channel is time-variant,frequency-selective and noisy;the received OFDM signals are corrupted by intercarrier interference.Channel estimation algorithms are adopted to demodulate the OFDM signals accurately.Nowadays,the theoretics and simulation performance of channel estimation for OFDM have matured.But it is considered to be a key point to the implement of channel estimation system based on hardware.This paper analyses the performances of some channel estimation methods,then puts emphasis on building up a channel estimation platform for OFDM baseband system which bases on Field Programmable Gate Array (FPGA).This paper analyses the performances of block pilot arrangement and comb-type pilot arrangement.1) Use matlab to simulate the the slow-fading estimation algorithms based on block pilot arrangement(LS,LMMSE and SVD algorithms),then analyses their performances.2) Use matlab to simulate the fast-fading channel estimation algorithms based on comb-type pilot arrangement(constant,liner,gauss),then analyses their performances.This paper puts LS algorithm based on block pilot arrangement as the channel estimation method in the implement of hardware.Because LS algorithm is easy,and performs good after it is optimized by liner.In FPGA designing part,this paper designs the transmitter and receiver apart.The transmitter includes constellation mapping,pilot insert,IFFT translation,multiply, cyclic prefix insert modules,and the receiver includes cyclic prefix expurgate,divide, FFT translation,data separate,channel estimate,constellation demapping modules.The whole system is built up and passed through the software simulation.The final results show effectiveness of the design.The software platform of QuartusⅡ8.1 and VHSIC Hardware Description Language(VHDL) are used to design.

Related Dissertations

  1. Research on Electromagnetic Acoustic Transducer Detection System Based on FPGA,TH878.2
  2. Study on Drive and Control System of Five-Phase PMSM Based on FPGA,TM341
  3. Development of LXI Arbitrary Waveform Generator,TM935
  4. Design of Digital Predistorter for RF Power Amplifier Based on FPGA,TN722.75
  5. Synchronization and Channel Estimation Algorithm in Bursted OFDM System and Its Implementation on FPGA,TN919.3
  6. Performance Analysis of Anti-Multipath Capability in DSSS System and Study on the Compensation Methods,TN914.42
  7. Study on Implementation Technology of Channel Estimation in OFDM System Based on DSP,TN919.3
  8. Optimizing and Realising Research on Vedio Compression in TV Guidance System,TN919.81
  9. The Technology Research on Channel Coding and Channel Estimation in MC-CDMA Systems,TN929.533
  10. Research and Hardware Simulation of Multiuser Spread Spectrum Code Acquisition Based on FPGA,TN914.42
  11. Research on Basic Algorithms of Digital Image Processing and Implementation with FPGA,TP391.41
  12. Research of High Speed Image Pre-processing System Based on FPGA,TP391.41
  13. Design of High-Speed Digital Image Acquisition and Interface Based on FPGA,TP274.2
  14. Development of Inductance Sensor Data Acquisition System Based on FPGA,TP274.2
  15. Development of Serial Bus Analyzer Based on Nios,TP274
  16. Development of PMC High-speed Data Transmission Board Design Based on FPGA-RocketIO_X,TP274.2
  17. Development of Pxibus High Performance Digital I/O Module,TP274
  18. Development of LXI Counter,TP274
  19. A High-Speed and Real-Time Data Acquisition System Based on FPGA,TP274.2
  20. The Research on Reliability of Low-Voltage Power Line Communication,TM73
  21. Design of GPS Information Receiving System Based on Nios Ⅱ,TN967.1

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