naa a22 4500 510795218 CHVBK 20180411083334.0 cr unu---uuuuu 180411e20130301xx s 000 0 eng 10.1007/s11277-012-0590-x doi (NATIONALLICENCE)springer-10.1007/s11277-012-0590-x Performances of Amplify-and-Forward Cooperative Relay Networks with Different Topologies [Elektronische Daten] [Chengliang Huang, Xiao-Ping Zhang] When the sizes of terminals are limited, cooperative relay networks are recommended as promising virtual MIMO systems to improve the performances of wireless communication systems in literature. Accordingly, some comparisons on the performances of different systems are useful to guide the selection and deployment of cooperative relay systems in field applications. In this paper, we compare the outage probabilities of cooperative relay networks of different topologies (different numbers of antennas used at a transmitter and relays used in a system), as well as the outage probabilities of the MISO systems. We propose an aggregated channel mode, which combines the power gain obtained from the reduction of path loss through the deployment of relays, and the flat fading caused by multi-path propagation. During the evaluation of the performances of different systems, we apply information theory in the calculation of ergodic capacities and consider the requirement on wireless resources in the estimation of outage probabilities. Numerical simulation shows that (1) cooperative networks with multiple relays outperform those with multiple antennas; (2) only when the power gain is included, the performances of cooperative relay networks are comparable with their counterparts in direct transmission; (3) the performances are significantly affected by the locations of relays. Springer Science+Business Media, LLC., 2012 Cooperative relay nationallicence Channel capacity nationallicence Outage probability nationallicence Wireless resources nationallicence Network topology nationallicence Relay location nationallicence Huang Chengliang Electrical and Computer Engineering Department, Ryerson University, M5B 2K3, Toronto, ON, Canada aut Zhang Xiao-Ping Electrical and Computer Engineering Department, Ryerson University, M5B 2K3, Toronto, ON, Canada aut Wireless Personal Communications Springer US; http://www.springer-ny.com 69/2(2013-03-01), 561-577 0929-6212 69:2<561 2013 69 11277 https://doi.org/10.1007/s11277-012-0590-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11277-012-0590-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Huang Chengliang Electrical and Computer Engineering Department, Ryerson University, M5B 2K3, Toronto, ON, Canada aut NATIONALLICENCE 700 1- Zhang Xiao-Ping Electrical and Computer Engineering Department, Ryerson University, M5B 2K3, Toronto, ON, Canada aut NATIONALLICENCE 773 0- Wireless Personal Communications Springer US; http://www.springer-ny.com 69/2(2013-03-01), 561-577 0929-6212 69:2<561 2013 69 11277 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer