By Savo Glisic, Beatriz Lorenzo
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Extra info for Advanced wireless networks: Cognitive, cooperative and opportunistic 4G technology
This in effect allows interference avoidance for that user if it is currently being scheduled. 5) jD1 where x(t) is the signal of interest, u j (t) is the interference from the jth base station and z(t) is additive Gaussian noise. 7) nD1 where h n and gn j are the slow fading channel gains to the user from the nth transmit antenna of the base station of interest and the interfering base station j, respectively. 8) jg j (t)j2 C ¦ 2 jD1 The SINR varies because of both the variations of the overall gain from the base station of interest as well as those from the interfering base station.
1 Multiple-output and multiple-input link diversity The model of ad hoc networks used in this section is quite general. It includes homogeneous and heterogeneous ad hoc networks, and wireless mesh networks. In all these networks, the channel quality of a link is normally time-varying due to fading, shadowing, noise and interference. Different links usually experience independent instantaneous channel qualities. This phenomenon was referred to in the previous sections as the multiuser diversity.
29] C. Politis, T. Oda, S. Dixit, A. -Y. Lach, M. I. Smirnov, S. Uskela and R. Tafazolli, Cooperative networks for the future wireless world, IEEE Commun. , vol. 42, no. 9, September 2004, pp. 70–79.  V. Marques, R. L. Aguiar, C. Garcia, J. I. Moreno, C. Beaujean, E. Melin and M. Liebsch, An IP-based QoS architecture for 4G operator scenarios, IEEE Wireless Commun. [see also IEEE Pers. ], vol. 10, no. 3, June 2003, pp. 54–62.  Luan Huang, Kar Ann Chew and R. , vol. 5, 30 May–1 June 2005, pp.
Advanced wireless networks: Cognitive, cooperative and opportunistic 4G technology by Savo Glisic, Beatriz Lorenzo