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We consider the downlink of a realistic cellular network composed of multiple clusters, each of which includes multiple relays and a destination terminal. In this scenario, the interference among the clusters is a critical issue, affecting the end-to-end performance of the system significantly. Considering the inter-cluster interference, we propose optimal and suboptimal relay selection schemes to...
For extended cell coverage and green communication, various small-cell networks, such as femtocells and picocells, are applied to cellular networks. This leads to the reduction of shadow areas and an increase of spectral efficiency with higher cell-edge capacity. Due to increasing heterogeneity, however, small cells cause co-tier and cross-tier interferences which are the critical issue that aggravates...
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