Efficient Pricing Technique for Resource Allocation Problem in Downlink OFDM Cognitive Radio Networks

[摘要] In this paper, the problem of resource allocation in OFDM-based downlink cognitive radio (CR) networks has been proposed. The purpose of this research is to decrease the computational complexity of the resource allocation algorithm for downlink CR network while concerning the interference constraint of primary network. The objective has been secured by adopting pricing scheme to develop power allocation algorithm with the following concerns: (i) reducing the complexity of the proposed algorithm and (ii) providing firm power control to the interference introduced to primary users (PUs). The performance of the proposed algorithm is tested for OFDM- CRNs. The simulation results show that the performance of the proposed algorithm approached the performance of the optimal algorithm at a lower computational complexity, i.e., O(NlogN), which makes the proposed algorithm suitable for more practical applications.

[发布机构] Electrical and Electronic Engineering, Al-Madinah International University Malaysia, Malaysia^1;Centre Tecnològic de Telecomunicacions de Catalunya (CTTC), Barcelona, Spain^2;Electrical, Electronic and System Engineering Dept., University Kebangsaan Malaysia, Bangi, Malaysia^3;Electrical Engineering Dept., University Islam Indonesia, Yogyakarta, Indonesia^4

[效力级别] 无线电电子学

[关键词] Cognitive radio network;Interference constraints;Optimal algorithm;Power allocation algorithms;Pricing scheme;Primary networks;Resource allocation algorithms;Resource allocation problem