Title :
SINR Estimation of OFDM-CDMA Systems with Constant Timing Offset: a Large System Analysis
Author :
Nasser, Youssef ; Des Noes, Mathieu ; Ros, Laurent ; Ve Jourdain, Genevi
Author_Institution :
CEA-LETI, Grenoble
Abstract :
This article presents the impact of a constant timing error on the performance of a downlink 2 dimensional spreading OFDM-CDMA system. This impact is measured by the signal to interference plus noise ratio (SINR) degradation after equalization and despreading. Using random matrix theory, an asymptotic evaluation of the SINR is obtained. It is independent of the value of users´ spreading code while taking into account their orthogonality. Simulation results are provided to evaluate and discuss the validity of this model
Keywords :
OFDM modulation; code division multiple access; equalisers; matrix algebra; radio links; OFDM-CDMA systems; SINR estimation; constant timing offset; despreading; equalization; random matrix theory; signal to interference plus noise ratio; spreading code; Bit error rate; Degradation; Downlink; Image analysis; Interference; Noise measurement; OFDM; Performance analysis; Signal to noise ratio; Timing; Asymptotic performance; MC-CDMA; MC-DS-CDMA; MMS; OFDM; SI R;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2005. PIMRC 2005. IEEE 16th International Symposium on
Conference_Location :
Berlin
Print_ISBN :
9.7838007291e+012
DOI :
10.1109/PIMRC.2005.1651473
