Title :
An investigation of dynamic sub-carrier allocation in OFDMA systems
Author :
Peng, Y. ; Doufexi, A. ; Armour, S. ; McGeehan, J.
Author_Institution :
Centre for Commun. Res., Bristol Univ., UK
fDate :
30 May-1 June 2005
Abstract :
Orthogonal frequency division multiple access (OFDMA) systems commonly operate with a pseudo-random allocation of active sub-carriers to users. However, dynamic (multi-user) sub-carrier allocation (DSA) in an OFDMA system with a SISO channel has been investigated previously in Y. Wong Cheong et al. (1999), W. Rhee et al. (2000-2001). In this paper, an alternative algorithm is proposed and evaluated. Simulation results identify gains of up to 10 dB and show that near identical gain is achieved for all users.
Keywords :
channel allocation; frequency division multiple access; mobile radio; multiuser channels; OFDMA systems; SISO channel; dynamic subcarrier allocation; multiuser allocation; pseudorandom allocation; AWGN; Data mining; Digital video broadcasting; Diversity methods; Downlink; Fast Fourier transforms; Frequency conversion; Frequency domain analysis; MIMO; OFDM modulation; Adaptive modulation; MIMO; OFDMA;
Conference_Titel :
Vehicular Technology Conference, 2005. VTC 2005-Spring. 2005 IEEE 61st
Print_ISBN :
0-7803-8887-9
DOI :
10.1109/VETECS.2005.1543633
