Title :
On the performance of a multiuser multiarray COFDM system
Author :
Renoult, Adrien ; Poulliat, Charly ; Chenu-Tournier, Marc ; Fijalkow, Inbar
Abstract :
The performance of a multiuser multiarray coded orthogonal frequency division multiplexing (COFDM) system are investigated. The receiver is made of a channel estimator, a symbol detector which exits log likehood ratios (LLRs) and a channel decoder. In this paper, in order to evaluate the performance of the system, the LLRs at the output of the symbol detector are modeled as a Rayleigh process whose signal to noise ratio (SNR) depends on the different parameters. To characterize the accuracy of the modeled LLRs (in comparison with the true LLRs), we examine the bit error rate (BER) at the output of the channel decoder. We then study the impact of the multiuser characteristics and of the channel estimation error. Finally the validity of our analysis is shown by simulations.
Keywords :
OFDM modulation; Rayleigh channels; antenna arrays; channel coding; channel estimation; error statistics; radio receivers; BER; LLR; Rayleigh process; SNR; bit error rate; channel estimator-decoder; coded orthogonal frequency division multiplexing; log likehood ratios; multiuser multiarray COFDM system; signal-to-noise ratio; symbol detector; Analytical models; Bit error rate; Channel estimation; Decoding; Delay; Detectors; Electronic mail; Fading; OFDM; Signal processing;
Conference_Titel :
Signal Processing Advances in Wireless Communications, 2004 IEEE 5th Workshop on
Print_ISBN :
0-7803-8337-0
DOI :
10.1109/SPAWC.2004.1439285
