Panayotis G. Cottis

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—The high frequency segment (10-66GHz) of the IEEE 802.16 standard seems promising for the implementation of wireless backhaul networks carrying large volumes of Internet traffic. In contrast to wireline backbone networks, where channel errors seldom occur, routing decisions in IEEE 802.16 networks are conditioned by wireless channel impairments rather than(More)
—The present article carries out a review of MIMO-based techniques that have been recently proposed for satellite communications. Due to the plethora of MIMO interpretations in terrestrial systems and the particularities of satellite communications , this review is built on two pillars, namely fixed satellite and mobile satellite. Special attention is given(More)
Recommended by Alessandro Vanelli-Coralli This paper investigates the applicability of multiple-input multiple-output (MIMO) technology to satellite communications at the Ku-band and above. After introducing the possible diversity sources to form a MIMO matrix channel in a satellite environment, particular emphasis is put on satellite diversity. Two(More)
A coalitional game theoretic scheme is proposed that aims at maximizing wireless sensor network lifetime under specified QoS. Employing a small number of nodes of increased computing power and lifetime called <i>representatives</i>, an adaptive clustering scheme is proposed where neighboring nodes form coalitions in order to increase energy efficiency at(More)