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In this paper, we study a resource efficient coordinated beamforming design for the downlink of heterogeneous multiuser system. The objective function is formulated as maximizing the weighted sum per-cell resource efficiencies subject to per-user quality of service demands and per-cell transmit power constraints, which is hard to tackle due to the weighted sum-of-ratios form and the non-convex nature...
To study the fuzzy and grey information in the problems of multi-attribute decision- making, the basic concepts of both the triangular fuzzy number and fuzzy grey number are given. Firstly, a new model of fuzzy grey multi-attribute decision making based on the theories of fuzzy mathematics and grey system is presented. Furthermore, the deviation degree is defined, and the algorithm of relative approximation...
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