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Considering the shortcomings of the attribute weight setting method used currently in the decision model of choosing project transaction mode, which is typically characterized by precise weights, the stochastic problem of index weight of multi-attribute comprehensive evaluation is researched. Under the weight interval information is chosen, the stochastic weight assignment method is used to determine...
OFDMA is a potential technology that can flexibly allocate subcarriers while providing diversity gain to multiple users. In our recent work, we showed a surprising result that the maximum frequency diversity gain in OFDMA systems is equal to the number of independent subcarriers, i.e., the same as that in point-to-point OFDM systems despite of the fact that multiple users will share a common set of...
OFDM can provide frequency diversity gain for point-to-point communications over frequency-selective slow fading channel. Recent works show that OFDM may also form a flexible and efficient multiple access method, which is often referred to OFDMA. However, the user outage probability and the optimal frequency diversity gain in OFDMA systems are not known. In this paper, random bipartite graph is used...
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