2006, Volume 8, Issue 1
Strategic Study of CAE >> 2006, Volume 8, Issue 1
Research of the Optimum SNR Thresholds of AQAM System Over Multi-path Rayleigh Channel
Communication and Information Engineering Institute , Nanjing University of Posts and Telecommunications , Nanjing 210003 , China
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Abstract
Adaptive modulation techniques can improve the BER (bit error rate) performance or the average throughput by employing a suitable modulation mode depending on the instantaneous channel SNR (signal-to-noise ridio). In this paper the optimum SNR thresholds over a 6-path Rayleigh channel are derived, which shows a superior BPS (bit per symbol) throughput performance while maintaining the target average BER. The 6-path Rayleigh channel is often applied to mobile environment with high-speed. The results achieved in this paper can be applied to the adaptive modulation system with the channel of ITU-R M. 1225 Vehicular Test A mode.
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References
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