Adaptive Modulation and Combining for Bandwidth Efficient Communication over Fading Channels

Conference: PIMRC 2005 - 16th Annual IEEE International Symposium on Personal Indoor and Mobile Radio Communications
09/11/2005 - 09/14/2005 at Berlin, Germany

Proceedings: PIMRC 2005

Pages: 5Language: englishTyp: PDF

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Belhaj, Nesrine; Hamdi, Noureddine; Bouallegue, Ammar (Laboratoire SysCOM, Ecole Nationale d’Ingenieurs de Tunis (ENIT), Tunis, Tunisia)
Alouini, Mohamed-Slim (Department of Electrial Engineering, Texas A&M University at Qatar (TAMUQ), Education City, Doha, Qatar)

Traditional fading mitigation techniques are designed relative to the worst-case channel conditions, resulting in a poor utilization of the spectrum and the available power a good percentage of the time. In contrast, we introduce and investigate in this paper new adaptive modulation and diversity combining techniques that jointly select the most appropriate constellation size and the most suitable diversity branches in response to the channel variation and given a desired bit error rate (BER) requirement. Numerical results show that these newly proposed adaptive modulation and combining schemes can reduce considerably the average receiver channel estimation complexity as well as the power drain from the battery while offering full spectral efficiency and satisfying the desired outage probability and BER requirements.