Optimal power allocation in dispersed cognitive radio systems with carrier aggregation
Author | Foukalas, Fotis |
Author | Khattab, Tamer |
Available date | 2021-03-31T08:18:08Z |
Publication Date | 2016 |
Publication Name | 2016 International Conference on Computing, Networking and Communications, ICNC 2016 |
Resource | Scopus |
Abstract | In this paper, we investigate the optimal power allocation problem in dispersed cognitive radios with carrier aggregation. To this end, we model the carrier aggregation using an i - th frequency diversity policy, wherein each component carrier is provided with a maximal ratio combining. An ascending order is employed for the aggregation using maximal ratio combining receiver. Additionally, due to the dispersed nature of the channels, we assume an independent but non-identically distributed (i.n.i.d.) η - μ distribution for each channel branch. Having defined this model, we formulate the maximization problem over the transmit power of each CC with frequency diversity provision over the heterogeneous fading channels. The problem is solved using alternating direction method of multipliers (ADMM) as a dual decomposition application providing robustness. Distributed (without consensus) and centralized (with consensus) ADMM algorithms are devised and the corresponding simulation results are discussed. Simulation results corroborates the performance gain of the proposed ADMM solution both in terms of iterations and rate gain per CC. |
Language | en |
Publisher | Institute of Electrical and Electronics Engineers Inc. |
Subject | alternating direction method of multipliers carrier aggregation dispersed cognitive radio Optimal power allocation |
Type | Conference Paper |
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Electrical Engineering [2649 items ]