Title :
Joint resource optimization in decode and forward multi-relay cognitive network with direct link
Author :
Shaat, Musbah ; Bader, Faouzi
Author_Institution :
Centre Tecnol. de Telecomunicacions de Catalunya (CTTC), Barcelona, Spain
Abstract :
An OFDM based cognitive radio (CR) network is considered in this paper. The goal is to maximize the total sum rate of the CR system while ensuring that no excessive interference is induced to the primary system. The optimal scheme adopts the dual decomposition technique and in order to reduce the computational complexity of the optimal scheme, a greedy suboptimal algorithm is proposed. Selected numerical results is discussed to reveal the near-optimal performance of the suboptimal scheme and the superiority of the proposed algorithm over the random and the signal-to-noise ratio (SNR) based schemes.
Keywords :
OFDM modulation; cognitive radio; computational complexity; decode and forward communication; greedy algorithms; optimisation; radio links; resource allocation; CR network; OFDM; SNR scheme; computational complexity; decode and forward multirelay cognitive radio network; direct link; dual decomposition technique; greedy suboptimal algorithm; interference; joint resource optimization; resource allocation; signal-to-noise ratio scheme; Computational complexity; Interference constraints; OFDM; Relays; Resource management; Signal to noise ratio; Cooperative cognitive radio system; Decode-and-Forward; Joint resource allocation; OFDM; Resource management; Throughput;
Conference_Titel :
Wireless Communications and Networking Conference (WCNC), 2012 IEEE
Conference_Location :
Shanghai
Print_ISBN :
978-1-4673-0436-8
DOI :
10.1109/WCNC.2012.6213999
