Title :
Decentralized OFDMA Wireless System with Multiuser Diversity Allocation
Author :
Guanyu Zhang ; Armour, Simon ; McGeehan, Joseph P.
Author_Institution :
Centre for Commun. Res., Univ. of Bristol, Bristol, UK
Abstract :
In this paper, a decentralized wireless network based on OFDMA with multiuser diversity allocation has been modelled and simulated. Two different decentralized subcarrier allocation schemes have been presented, which are the collision subcarrier detection scheme and the incremental subcarrier allocation scheme. The convergence time of these decentralized subcarrier allocation schemes with and without Multiuser Diversity Allocation (MUDA) has been investigated, while their performance comparison with the centralized multiuser diversity allocation in terms of channel gains and channel capacity also has been performed. When the system with MUDA is compared to one without, results show a channel capacity improvement varying from 21% to 49% depending upon the number of subcarriers per transmitter. This is obtained at the cost of 0.3% to 23% more convergence time.
Keywords :
OFDM modulation; channel capacity; diversity reception; frequency division multiple access; multiuser channels; radio networks; radio transmitters; signal detection; telecommunication traffic; MUDA transmitter; centralized multiuser diversity allocation scheme; channel capacity; channel gains; collision subcarrier detection scheme; decentralized OFDMA wireless network; decentralized subcarrier allocation scheme; incremental subcarrier allocation scheme; orthogonal frequency division multiple access; Bandwidth; Channel capacity; Gain; Payloads; Resource management; Transmitters; Wireless networks;
Conference_Titel :
Vehicular Technology Conference (VTC Spring), 2015 IEEE 81st
Conference_Location :
Glasgow
DOI :
10.1109/VTCSpring.2015.7145768
