Turbo decision aided receivers for clipping noise mitigation in coded OFDM
EURASIP Journal on Wireless Communications and Networking
Iterative soft compensation for OFDM systems with clipping and superposition coded modulation
IEEE Transactions on Communications
Diversity-enabled and power-efficient transceiver designs for peak-power-limited SIMO-OFDM systems
EURASIP Journal on Advances in Signal Processing - Special issue on advanced equalization techniques for wireless communications
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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.