Title :
A computationally efficient simulation chain for OFDM-based wireless systems
Author :
Poikonen, Jussi ; Ojaniemi, Jaakko ; Nybom, Kristian ; Gómez-Barquero, David ; Jokela, Tero
Author_Institution :
Aalto Univ., Aalto, Finland
Abstract :
We present a method for modeling OFDM transmission over time- and frequency-selective fading channels using finite-state hidden Markov models. The proposed approach has improved fading autocorrelation accuracy compared to previous related models. Also, we present a way of producing log likelihood ratio values as output of the finite-state model for any signal constellation. As a case study, we configure the proposed model according to the second generation terrestrial digital video broadcast system operating over a typical urban mobile channel.
Keywords :
OFDM modulation; fading channels; hidden Markov models; simulation; video signal processing; OFDM; computationally efficient simulation chain; finite-state hidden Markov models; frequency-selective fading channels; log likelihood ratio values; signal constellation; time-selective fading channels; urban mobile channel; video broadcast system; wireless systems; Computational modeling; Correlation; Hidden Markov models; Markov processes; OFDM; Rayleigh channels; Channel modeling and simulation; LDPC coding; performance evaluation; wireless communication;
Conference_Titel :
Broadband Multimedia Systems and Broadcasting (BMSB), 2011 IEEE International Symposium on
Conference_Location :
Nuremberg
Print_ISBN :
978-1-61284-121-2
Electronic_ISBN :
2155-5044
DOI :
10.1109/BMSB.2011.5954893
