TY - GEN
T1 - Minimum mean square error turbo equalization of doubly selective channels using the BEM
AU - Barhumi, Imad
PY - 2012
Y1 - 2012
N2 - In this paper, linear minimum mean square error (LMMSE) turbo equalization for transmission over doubly selective channels is proposed for single carrier (SC) as well as for multi-carrier (MC) systems. The complex exponential basis expansion model (CE-BEM) is used to approximate the time-varying multi-path fading channel. In this BEM, the time-varying channel is viewed as a bank of time-invariant FIR filters and the time-variation is captured by means of time-varying complex exponential basis functions. Based on the Gaussian approximation, exact expressions for the a-priori, a-posteriori and extrinsic information are derived for QPSK modulation. The MC system is implemented using orthogonal frequency-division multiplexing (OFDM). The performance of the proposed turbo equalization schemes are evaluated using numerical simulations.
AB - In this paper, linear minimum mean square error (LMMSE) turbo equalization for transmission over doubly selective channels is proposed for single carrier (SC) as well as for multi-carrier (MC) systems. The complex exponential basis expansion model (CE-BEM) is used to approximate the time-varying multi-path fading channel. In this BEM, the time-varying channel is viewed as a bank of time-invariant FIR filters and the time-variation is captured by means of time-varying complex exponential basis functions. Based on the Gaussian approximation, exact expressions for the a-priori, a-posteriori and extrinsic information are derived for QPSK modulation. The MC system is implemented using orthogonal frequency-division multiplexing (OFDM). The performance of the proposed turbo equalization schemes are evaluated using numerical simulations.
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U2 - 10.1109/ISSPA.2012.6310692
DO - 10.1109/ISSPA.2012.6310692
M3 - Conference contribution
AN - SCOPUS:84868567445
SN - 9781467303828
T3 - 2012 11th International Conference on Information Science, Signal Processing and their Applications, ISSPA 2012
SP - 951
EP - 955
BT - 2012 11th International Conference on Information Science, Signal Processing and their Applications, ISSPA 2012
T2 - 2012 11th International Conference on Information Science, Signal Processing and their Applications, ISSPA 2012
Y2 - 2 July 2012 through 5 July 2012
ER -