Title :
An adaptive subcarrier, bit and power allocation algorithm for multicell OFDM systems
Author :
Yan, Li ; Wenan, Zhou ; Junde, Song
Author_Institution :
PCN&CAD Center, Beijing Univ. of Posts & Telecommun., China
Abstract :
Orthogonal frequency division multiplexing (OFDM) is an optimal technique for high-speed transmission. In this paper, a multicell multiuser OFDM system with adaptive subcarrier allocation and adaptive modulation is considered. We propose an adaptive subcarrier, bit and power allocation algorithm to maximum the total throughput of the multicell system in the presence of cochannel interference (CCI), frequency selective Rayleigh fading and additive white Gaussian noise (AWGN). Its performance in a multicell system with different number of users is investigated through simulation. It is shown from the simulation that this adaptive allocation algorithm enhances the throughput of OFDM systems as compared to equal power allocation and is suitable for multiuser system.
Keywords :
AWGN; OFDM modulation; Rayleigh channels; adaptive modulation; cellular radio; cochannel interference; multi-access systems; AWGN; CCI; adaptive modulation; adaptive subcarrier allocation algorithm; additive white Gaussian noise; bit allocation algorithm; co-channel interference; frequency selective Rayleigh fading; high-speed transmission; multicell multiuser OFDM system; orthogonal frequency division multiplexing; power allocation algorithm; total throughput enhancement; AWGN; Adaptive algorithm; Adaptive systems; Base stations; Fading; OFDM modulation; Propagation losses; Radiofrequency interference; Rayleigh channels; Throughput;
Conference_Titel :
Electrical and Computer Engineering, 2003. IEEE CCECE 2003. Canadian Conference on
Print_ISBN :
0-7803-7781-8
DOI :
10.1109/CCECE.2003.1226196
