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2014 12th International Conference on Frontiers of Information Technology (FIT) (2014)
Islamabad, Pakistan
Dec. 17, 2014 to Dec. 19, 2014
ISBN: 978-1-4799-7504-4
pp: 41-45
ABSTRACT
The paper considers an underlay cognitive radio model, which includes multiple primary and secondary users. Under the interference limitations imposed for the conservation of a high quality of service (QOS) for the primary users, this work aims to enhance the throughput of the secondary users. A joint optimization of secondary to primary user assignment and the power allocation at the secondary user's transmitters is adopted under the interference as well as individual power constraints. To solve the formulated integer programming problem, dual decomposition strategy is adopted. Karush -- Kuhn -- Tucker (KKT) optimality conditions are exploited to obtain the optimal power allocation while user pairing is obtained from the assignment problem. Moreover, sub-optimal schemes are proposed to reduce the complexity and finally simulations are conducted to validate the proposed schemes.
INDEX TERMS
Resource management, Interference, Cognitive radio, Throughput, Joints, Wireless sensor networks,user assignment, Cognitive Radio, resource allocation, power allocation
CITATION
Yamna Rehman, Hamad Ullah, Talha Bin Tariq, Guftaar Ahmad Sardar Sidhu, "User Assignment and Power Allocation Optimization in Cognitive Radio Networks", 2014 12th International Conference on Frontiers of Information Technology (FIT), vol. 00, no. , pp. 41-45, 2014, doi:10.1109/FIT.2014.17
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