Sun, ZhiAkyildiz, Ian F.Hancke, Gerhard P.2012-05-252012-05-252011-11Sun, Z, Akyildiz, IF & Hancke, GP 2011, 'Capacity and outage analysis of MIMO and cooperative communication systems in underground tunnels', IEEE Transactions on Wireless Communications, vol. 10, no. 11, pp. 3793-3803.1536-1276 (print)1558-2248 (online)10.1109/TWC.2011.093011.110632http://hdl.handle.net/2263/18882In underground mine and road tunnels, multipath fading is much more severe than the terrestrial wireless channels. To overcome the multipath fading in underground tunnels, MIMO (Multiple Input Multiple Output) and Cooperative Communication systems can be utilized. Since the underground channel characteristics are significantly different from those in terrestrial environments, the channel capacity and the outage behavior of such systems need to be investigated based on underground tunnel channel models, which has not been addressed by the research community yet. In this paper, the capacity distribution and outage probability of MIMO and cooperative communication systems are investigated in underground tunnel environments. Explicit formulas of the capacity distribution and outage probability are developed as functions of environmental conditions and system configurations. Based on the capacity and outage analysis in underground tunnels, the optimal MIMO antenna geometry design scheme is proposed for MIMO systems; and the cooperative relay assignment protocol is developed for cooperative communication systems. Simulations are conducted to validate the theoretical results.en© 2011 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.Underground mine tunnelUnderground road tunnelMIMOCooperative communicationsChannel capacityOutage behaviorMIMO antenna geometryCooperative relay assignmentMIMO systemsTunnelsRadio -- Transmitters and transmission -- FadingPostprint Article