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Efficient cooperative communication protocols are viewed as one of the mechanisms for increasing the diversity order, robustness and energy efficiency of a wireless communication system. Innovative concepts such as opportunistic relay cooperative transmission coupled with adaptive transmission may drive to low power consumption while keeping advantage of the diversity gain offered by the adaptive mechanisms. The goal of this paper is to investigate the effectiveness of the hybrid cooperation protocols proposed in for wide-band wireless mobile communication systems, such for instance IEEE 802.16e.
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