Title :
Opportunistic dynamic subchannel allocation in multiuser OFDM networks with limited feedback
Author :
Sanayei, Shahab ; Nosratinia, Aria ; Aldhahir, Nuofal
Author_Institution :
Dept. of Electr. Eng., Texas Univ., Richardson, TX, USA
Abstract :
In this paper we present a simple scheme for subchannel allocation in OFDM multiuser networks in the presence of limited feedback, in particular, when only one bit of information per subchannel is available at the base station. Our objective is to maximize the sum rate capacity of the network in the downlink transmission. We show that even with very limited feedback the sum rate capacity growth is the same as the fully informed transmission. We also extend this result to the case when subchannels are correlated.
Keywords :
4G mobile communication; OFDM modulation; channel allocation; channel capacity; correlation theory; feedback; multiuser channels; optimisation; correlated subchannels; downlink transmission; limited feedback; multiuser OFDM networks; next generation wireless systems; opportunistic dynamic subchannel allocation; sum rate capacity maximization; Base stations; Broadband communication; Delay; Diversity methods; Downlink; Fading; Feedback; Intelligent networks; OFDM; Quality of service;
Conference_Titel :
Information Theory Workshop, 2004. IEEE
Print_ISBN :
0-7803-8720-1
DOI :
10.1109/ITW.2004.1405296
