Title :
On the optimality of the OFDMA network
Author :
Li, Guoqing ; Liu, Hui
Author_Institution :
Dept. of Electr. Eng., Washington Univ., Seattle, WA, USA
fDate :
5/1/2005 12:00:00 AM
Abstract :
This letter studies the optimality of the OFDMA network. It is proved that in the multiuser multicarrier downlink system with independent decoding, OFDMA is the optimal multiple access scheme. It is also shown that the optimality of OFDMA holds for any adaptive modulation scheme whose rate-SNR/SINR function can be approximated as a convex function.
Keywords :
adaptive modulation; convex programming; decoding; frequency division multiple access; radio links; OFDMA network; adaptive modulation scheme; convex function; decoding; multiple access scheme; multiuser multicarrier downlink system; optimization; orthogonal frequency division multiple access; AWGN; Decoding; Downlink; Frequency conversion; Frequency diversity; OFDM modulation; Quadrature amplitude modulation; Signal to noise ratio; Transmitters; Wireless networks;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2005.1431164
