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A novel compact circularly polarized Archimedean spiral antenna for ultrawideband (UWB) communication applications is presented. The basic structure is a two-arm planar Archimedean spiral antenna, which is fed by a tapered wideband balun. These two arms are extended on the profile and connected together at the end to elongate current path, while four lumped resistors are loaded on them to improve...
Network selection is a key technology to realize fair resource allocation and load balancing for converged multi-radio heterogeneous networks. In this paper, we propose a Multiple attribute decision making and Evolutionary Game Theory (MEGT) integrated network selection scheme. In MEGT, utility functions are designed appropriately to compute user QoS satisfaction of the candidate network. User preferences...
The next generation of small cell base stations (SCBSs), with multi-mode specialty, can offload part of traffic load to unlicensed spectrum to alleviate burden in licensed band. In this paper, we propose an interference graph to capture the coupling interference relationship in unlicensed band between small cell. Based on the interference graph, we formulated the traffic-offloading issue as the local...
Network selection plays an important role in load balancing and radio resources management. In this paper, we use the evolutionary game theory to address the network selection problem in the constrained heterogeneous networks. An indication function is introduced into the payoff function to represent the punishment term. The population dynamics can be obtained by the replicator equations. A centralized...
We study the game theoretic relay selection in cognitive relay networks under the interference power constraint at the primary receivers and the total available power constraint for the secondary relays. Based on the game model proposed in [1], the problem of relay selection is formulated as a noncooperative game where the rate of cognitive relay network is used as the common utility. This game is...
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