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Volume 26 Issue 5
May  2004
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Fang Xin, You Xiao-hu. Effect of Packet Duration and Channel Prediction on Performance of Adaptive Modulation System[J]. Journal of Electronics & Information Technology, 2004, 26(5): 766-770.
Citation: Fang Xin, You Xiao-hu. Effect of Packet Duration and Channel Prediction on Performance of Adaptive Modulation System[J]. Journal of Electronics & Information Technology, 2004, 26(5): 766-770.

Effect of Packet Duration and Channel Prediction on Performance of Adaptive Modulation System

  • Received Date: 2002-12-05
  • Rev Recd Date: 2003-07-11
  • Publish Date: 2004-05-19
  • In this paper, the effect of packet duration and channel prediction is analyzed in adaptive modulation. Spectral efficiency equations are derived for both systems with and without channel prediction. Numerical results show that systems with channel prediction can get maximum spectral efficiency while systems without channel prediction but chosen optimum packet length can get suboptimum frequency efficiency, which is inversely proportional to Doppler frequency.
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  • Webb W T, Steele R. Variable rate QAM for mobile radio[J].IEEE Trans. on Commun.1995,43(7):2223-2230[2]Goldsmith A J, Chua S G. Variable-rate variable-power MQAM for fading channels[J].IEEE Trans. on Commun.1997, 45(10):1218-1230[3]Chien C, et al.. Adaptive radio for multimedia wireless links[J].IEEE J. on Select. Area. Commun.1999, 17(5):793-813[4]Ahn C J, Sasase L. The effects of modulation combination, target BER, Doppler frequency, and adaptation interval, on the performance of adaptive OFDM in broadband mobile channel[J].IEEE Trans. on Consumer Electronics.2002, 48(1):167-174[5]Proakis J G. Digital Communications[M]. 4th ed., New York: McGraw-Hill, 2001: 41-47.[6]Tan C C, Beaulieu N C. On first-order Markov modeling for the Rayleigh fading channel[J].IEEE Trans. on Commun.2000, 48(12):2032-2040[7]Rappaport T S. Wireless Communications Principles and Practice[M]. Prentice Hall Inc., Simon Schuster Company, 1996, chapter 4.
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