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- Han, Sang-wook, et al.
(författare)
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A Distributed Power Allocation Scheme for Sum-Rate Maximization on Cognitive GMACs
- 2013
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Ingår i: IEEE Transactions on Communications. - 0090-6778 .- 1558-0857. ; 61:1, s. 248-256
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Tidskriftsartikel (refereegranskat)abstract
- This paper considers a distributed power allocation scheme for sum-rate-maximization under cognitive Gaussian multiple access channels (GMACs), where primary users and secondary users may communicate under mutual interference with the Gaussian noise. Formulating the problem as a standard nonconvex quadratically constrained quadratic problem (QCQP) provides a simple distributed method to find a solution using iterative Jacobian method instead of using centralized schemes. A totally asynchronous distributed power allocation for sum-rate maximization on cognitive GMACs is suggested. Simulation results show that this distributed algorithm for power allocation converges to a fixed point and the solution achieves almost the same performance as the exhaustive search.
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