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Volume 28 Issue 4
Aug.  2010
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Chen Ji-ming, Tang You-xi, Li Shao-qian. Analysis and Optimization of Pilot-Symbol-Assisted- Modulation M-QAM for OFDM Systems[J]. Journal of Electronics & Information Technology, 2006, 28(4): 698-702.
Citation: Chen Ji-ming, Tang You-xi, Li Shao-qian. Analysis and Optimization of Pilot-Symbol-Assisted- Modulation M-QAM for OFDM Systems[J]. Journal of Electronics & Information Technology, 2006, 28(4): 698-702.

Analysis and Optimization of Pilot-Symbol-Assisted- Modulation M-QAM for OFDM Systems

  • Received Date: 2004-08-30
  • Rev Recd Date: 2005-02-16
  • Publish Date: 2006-04-19
  • In this paper, the current analysis focuses on the influence of demodulation performance in multipath fading propagation environments, which results from the pilot power variation of Pilot Symbol Assisted Modulation (PSAM) M-QAM in Orthogonal Frequency Division Multiplexing (OFDM) systems. The Pilot-to-Data power Ratio (PDR) is optimized analytically, and the loss due to imperfect channel estimation is calculated. Theoretical and simulation results show that the optimum PDR is effected by the Signal-to-Noise Ratio (SNR), Doppler frequency and interpolation size etc. When the optimization parameter of PDR is used, the power of system transmission is the minimum but the same bit error rate (BER) is obtained.
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