Title :
Performance analysis of multiuser OFDM with optimum combining
Author :
Sorooshyari, Siamak ; Daut, David G.
Author_Institution :
Dept. of Electr. & Comput. Eng., Rutgers Univ., Piscataway, NJ, USA
Abstract :
Optimum combining is a diversity combining scheme that has appeared exclusively within the context of systems employing spatial diversity. In this paper the optimum combining principle is extended to a multiuser OFDM system to yield optimum performance with respect to the maximization of the signal-to-interference plus noise ratio (SINR) of each user. Theoretical and simulated results are presented for user performance in the presence of multiple interferers, Rayleigh fading among each subcarrier and thermal background noise. In conjunction with the conventional assumption of uncorrelated fading, analytical and simulation results are presented for the realistic scenario of correlated fading among subcarriers.
Keywords :
OFDM modulation; Rayleigh channels; channel estimation; correlation methods; diversity reception; multi-access systems; multiuser channels; optimisation; Rayleigh fading; correlated fading; diversity combining scheme; maximization; multiple interferer; multiuser OFDM system; optimum combining principle; performance analysis; spatial diversity; subcarrier; Additive noise; Analytical models; Background noise; Diversity reception; Frequency diversity; OFDM; Performance analysis; Performance gain; Rayleigh channels; Signal to noise ratio;
Conference_Titel :
Signals, Systems and Computers, 2004. Conference Record of the Thirty-Eighth Asilomar Conference on
Print_ISBN :
0-7803-8622-1
DOI :
10.1109/ACSSC.2004.1399228
