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Cognitive radio (CR) is a promising technology deemed to improve the efficiency of spectrum utilization. This paper considers a spectrum underlay cognitive radio network, in which the cognitive users (CUs) are allowed to use the radio spectrum concurrently with the primary users (PUs) under the interference temperature constraint. We investigate the system performance by using the proposed joint channel...
This paper investigates the power allocation between channels in a cognitive wireless network, using the spectrum underlay strategy where the primary users (PUs) and the cognitive users (CUs) coexist and operate in the same spectrum. We propose power allocation schemes to maximize the capacity of the overall system under the constraint that the interference to the PUs due to the CUs will not exceed...
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