Title :
Research on Adaptive Subcarrier-Bit-Power Allocation for OFDMA
Author :
Huang, Guogang ; He, Jiaming ; Zhang, Qingbo
Author_Institution :
Commun. Technol. Inst., Ningbo Univ., Ningbo, China
Abstract :
Resources allocation of OFDM system is a key factor that affects system performance. Parteek Bansal proposed a bit-power allocation algorithm under different bit error rate (BER). But the process of its bit allocation will cause high complexity and bad real-time to build a power-increment table. In this paper, a low-complexity multi-user subcarrier-bit-power allocation algorithm for wireless OFDMA system is proposed. In this new algorithm, the subcarriers are allocated to the user who has the best channel quality. As a result, channel capacity, based on multi-user frequency division, is improved through subcarrier allocation. At the same time, power allocation is advanced based on channel-loss-compensation. The result of simulation shows that the new algorithm´s complexity is lower than Parteek Bansal´s, and the BER is improved in the same SNR.
Keywords :
OFDM modulation; channel capacity; error statistics; frequency division multiple access; multiuser channels; resource allocation; wireless channels; BER; adaptive multiuser subcarrier-bit-power allocation; bit error rate; channel capacity; orthogonal frequency division multiple access system; resources allocation; wireless OFDMA system; Bit error rate; Channel capacity; Communications technology; Downlink; Frequency conversion; Helium; OFDM; Resource management; System performance; Transmitters;
Conference_Titel :
Wireless Communications, Networking and Mobile Computing, 2009. WiCom '09. 5th International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-3692-7
Electronic_ISBN :
978-1-4244-3693-4
DOI :
10.1109/WICOM.2009.5305523
