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The number of cooperative sensors to use is a compromise between sensing performance and resources usage efficiency. The definition of the optimal cooperative sensor set is given out firstly and then a greedy selection algorithm for the optimal cooperative sensor set is proposed which can use fewest cooperative sensors to maximize the resources usage efficiency, while still having enough for the sensing...
In this paper, power control problem in cognitive user is modeled as a non-cooperative game model. To improve the cognitive users' performance, this paper presents a new pricing function based on double-interference punishment (DIP) for non-cooperative power control game in a CDMA cognitive radio network. The model reduces the minimum Signal to Interference plus Noise Ratio (SINR) satisfied the requirement...
Wideband spectrum sensing is urgently in need for cognitive communication with wide spectrum range. When the cognitive user need to communication and when the exact primary user is found return, how to catch a new spectrum hole as fast and accurate as possible is becoming an intractable issue for the wideband cognitive user. In this paper, we propose a wideband sensing scheme for a cognitive user...
The SINR balancing problem involving joint beamforming and power control is considered in the cognitive radio network, wherein the single-input multi-output multiple access channels are assumed. Subject to two sets of constraints: the interference temperature constraints of primary users and the peak transmission power constraints of cognitive users, a low-complexity joint beamforming and power control...
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