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Resource allocation for asynchronous cognitive radio networks with FBMC/OFDM under statistical CSI

Juwendo Denis 1 Mylène Pischella 1 Didier Le Ruyet 1 
1 CEDRIC - LAETITIA - CEDRIC. Traitement du signal et architectures électroniques
CEDRIC - Centre d'études et de recherche en informatique et communications
Abstract : In this paper, we study resource allocation for a multicarrier-based cognitive radio (CR) network. More specifically, we investigate the problem of secondary users' energy-efficiency (EE) maximization problem under secondary total power and primary interference constraints. First, assuming cooperation among the secondary base stations (BSs), a centralized approach is considered to solve the EE optimization problem for the CR network where the primary and secondary users are using either orthogonal frequency-division multiplexing (OFDM) or filter bank based multicarrier (FBMC) modulations. We propose an alternating-based approach to solve the joint power-subcarrier allocation problem. More importantly, in the first place, subcarriers are allocated using a heuristic method for a given feasible power allocation. Then, we conservatively approximate the nonconvex power control problem and propose a joint successive convex approximation-Dinkelbach algorithm (SCADA) to efficiently obtain a solution to the nonconvex power control problem. The proposed algorithm is shown to converge to a solution that coincides with the stationary point of the original nonconvex power control subproblem. Moreover, we propose a dual decomposition-based decentralized version of the SCADA. Second, under the assumption of no cooperation among the secondary BSs, we propose a fully distributed power control algorithm from the perspective of game theory. The proposed algorithm is shown to converge to a Nash-equilibrium (NE) point. Moreover, we propose a sufficient condition that guarantees the uniqueness of the achieved NE. Extensive simulation analyses are further provided to highlight the advantages and demonstrate the efficiency of our proposed schemes. Index Terms-Energy efficiency (EE), filter bank based multi-carrier (FBMC), green communication, multicarrier modulation, orthogonal frequency-division multiplexing (OFDM), resource allocation.
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Submitted on : Monday, March 23, 2020 - 1:17:35 PM
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Juwendo Denis, Mylène Pischella, Didier Le Ruyet. Resource allocation for asynchronous cognitive radio networks with FBMC/OFDM under statistical CSI. 2016 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), Mar 2016, Shanghai, China. pp.3656-3660, ⟨10.1109/ICASSP.2016.7472359⟩. ⟨hal-02446333⟩



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