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In order to maximize the transmission throughput and quality of secondary users (SU) in an opportunistic spectrum access (OSA) systems operating under practical constraints of continuous collisions between the secondary and primary users (PU), we have studied the frame duration behavior and SU's detection frequency under difficult OSA interference and noise conditions. Having analyzed collisions from...
This paper mainly focused on resource allocation algorithm in Cognitive Radio networks. We proposed one semi-static resource allocation algorithm based on OFDMA-TDD. This algorithm can determine whether secondary users get the rights to seize the shared spectrum according to the required data rate of secondary users, so it can make the primary users share the spectrum with secondary users so as to...
In this paper, a novel power control algorithm for cognitive radio networks is proposed based on game theory. Taking power expenditure, quality of service (QoS) of both primary users (PUs) and cognitive second users (SUs) into account, we can model the power control problem as a multi-objective optimization problem. To solve this problem, a convex cost function is first constructed in terms of transmit...
In order to fully utilize the scarce wireless spectrum resources, many dynamic spectrum access approaches have emerged to enhance the spectrum efficiency in the spectrum market. From the economic point of view, in this paper we investigate the demand responsive pricing competition between two cognitive mobile virtual network operators (MVNOs) in a duopoly spectrum market and verify the pricing decisions...
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