Title :
Improved subcarrier allocation in cooperative OFDMA system
Author :
Wang, Jingning ; Wu, Xuanli ; Tan, Xuezhi
Author_Institution :
54th Res. Inst. of China Electron., Technol. Group Corp., Shijiazhuang, China
Abstract :
Focusing on the low throughput of fair subcarrier allocation in cooperative OFDMA system, an improved algorithm with single subcarrier capacity threshold and cooperative power factor is proposed. In this algorithm, the users with bad channel can not occupy too many subcarrier, and the power for cooperating with other users of users with good channel is limited. Simulation results show that this algorithm can increase the total channel capacity with less loss of fairness.
Keywords :
OFDM modulation; channel capacity; cooperative communication; frequency division multiple access; channel capacity; cooperative OFDMA system; cooperative power factor; fair-subcarrier allocation; fairness loss; improved subcarrier allocation; single-subcarrier capacity threshold; Channel capacity; Greedy algorithms; Relays; Resource management; Signal processing algorithms; Signal to noise ratio; Throughput; OFDMA; cooperative diversity; fairness tradeoff; subcarrier allocation;
Conference_Titel :
Communications and Networking in China (CHINACOM), 2011 6th International ICST Conference on
Conference_Location :
Harbin
Print_ISBN :
978-1-4577-0100-9
DOI :
10.1109/ChinaCom.2011.6158117
