TY - GEN
T1 - Recovering clipped OFDM symbols with Bayesian inference
AU - Declercq, David
AU - Giannakis, Georgios B.
PY - 2000/1/1
Y1 - 2000/1/1
N2 - A major problem with multicarrier transmissions is the near Gaussian behavior of the data stream entering the high power amplifier (HPA). This causes distortion (some samples are clipped) that must be corrected at the transmit-or receive-end, in order to improve the detection performance. We propose a new approach that recovers the distorted samples at the receiver. It is based on an augmented Bayesian model which captures the nonlinear behavior of the HPA. Estimates of the input symbols are then obtained with a hybrid deterministic/stochastic algorithm. Simulations over frequency selective channels show that when clipping is severe, our method outperforms existing methods.
AB - A major problem with multicarrier transmissions is the near Gaussian behavior of the data stream entering the high power amplifier (HPA). This causes distortion (some samples are clipped) that must be corrected at the transmit-or receive-end, in order to improve the detection performance. We propose a new approach that recovers the distorted samples at the receiver. It is based on an augmented Bayesian model which captures the nonlinear behavior of the HPA. Estimates of the input symbols are then obtained with a hybrid deterministic/stochastic algorithm. Simulations over frequency selective channels show that when clipping is severe, our method outperforms existing methods.
UR - http://www.scopus.com/inward/record.url?scp=0033707072&partnerID=8YFLogxK
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U2 - 10.1109/ICASSP.2000.861898
DO - 10.1109/ICASSP.2000.861898
M3 - Conference contribution
AN - SCOPUS:0033707072
T3 - ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
SP - 157
EP - 160
BT - Signal Processing Theory and Methods I
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 25th IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2000
Y2 - 5 June 2000 through 9 June 2000
ER -