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Volume 34 Issue 4
Mar.  2011
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Simulation of 4FSK and performance analysis of bit error rate in the RoFSO system

  • 1.

    School of Automation & Information Engineering, Xi'an University of Technology, Xi'an 710048, China

  • Received Date: 2009-09-09
    Accepted Date: 2009-10-29
  • It takes advantages of free space optical communication (FSO) to transmit RF signal,which is proved to have special predominance.In order to research radio over free space optics technology,under the background of FSO,the simulation was adopted to study coding and decoding system based on the theory of 4 frequency-shift keying modulation and demodulation.The error rate and channel capacity after the RF signal passing Gaussian noise and Rayleigh channel were also analyzed.The simulation results on bit error rate(BER) of two demodulation methods show that the zero crossing detection system has the better BER than the coherent demodulation system when the signal-to-noise ratio is 12dB.
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    PAN J J,JIA Zh H.Performance analys is of subcarrier atmospheric laser communication system over Gamma-Gamma channel[J].Journal of Xinjiang University,2007,24(1):92-96(in Chinese).
    [2]

    KE X Zh.Introduction to wireless laser communication[M].Beijing:Beijing University of Posts and Telecommunications Press,2004:10-26(in Chinese).
    [3]

    CHEN D,WANG G Zh.Research on modulation and demodulation system of 4FTSK based on DSP[J].Journal of Suzhou University of Science and Technology,2009,22(1):68-71(in Chinese).
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    QIU P L.Digital communication foundation[M].Beijing:Electronics Industry Press,2007:176(in Chinese).
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    SHI X H,LI K,ZHANG E Y.On the analysis and calculation of the channel capacity for the M-ary N-dimensional signal sets[J].Journal of Chongqing University of Posts and Telecommunications,2002,14(3):77-81(in Chinese).
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Simulation of 4FSK and performance analysis of bit error rate in the RoFSO system

  • 1. School of Automation & Information Engineering, Xi'an University of Technology, Xi'an 710048, China
  • Received Date: 2009-09-09
  • Accepted Date: 2009-10-29
  • Available Online: 2010-07-25

Abstract: It takes advantages of free space optical communication (FSO) to transmit RF signal,which is proved to have special predominance.In order to research radio over free space optics technology,under the background of FSO,the simulation was adopted to study coding and decoding system based on the theory of 4 frequency-shift keying modulation and demodulation.The error rate and channel capacity after the RF signal passing Gaussian noise and Rayleigh channel were also analyzed.The simulation results on bit error rate(BER) of two demodulation methods show that the zero crossing detection system has the better BER than the coherent demodulation system when the signal-to-noise ratio is 12dB.

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