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Performance analysis of adaptive turbo coded modulation over mobile communication channel  

Kim, Yeon-Su (School of Electrical Engineering and Computer Science, Kyungpook National University)
Lee, Sang-Hoon (School of Electrical Engineering and Computer Science, Kyungpook National University)
Joo, Eon-Kyeong (School of Electrical Engineering and Computer Science, Kyungpook National University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.43, no.10, 2006 , pp. 69-78 More about this Journal
Abstract
High spectral efficiency can be obtained by adaptive modulation in which the modulation scheme is changed according to the channel environment. Thus it is especially suitable to mobile channel which is a typical example of time-varying channel. It is required to determine the optimum thresholds of signal-to-noise ratio(SNR) to change the modulation scheme effectively according to mobile speeds. Thus the optimum thresholds for specific mobile speeds to get the required bit error rate(BER) of $10^{-6}$ are obtained with the powerful turbo code in this paper. In addition, the optimum thresholds for the continuous mobile speed are proposed by interpolation of the obtained results. And the error performance and average spectral efficiency are investigated at various mobile speeds and channel environments.
Keywords
Adaptive modulation; turbo code; mobile channel;
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