A robust receiver for OFDM systems in nonlinear impulse channels

Previously, a hybrid mechanism employing clipping and turbo coding was vindicated to be remarkably robust against impulse noise, characterized by strong power and frequent occurrence, in Orthogonal Frequency Division Multiplexing systems. This work aims at addressing the impulse noise together with the distortion induced by a more realistic transmitter configuration: Clipping and filtering for the peak-to-average power ratio reduction and nonlinearity of the power amplifier. Without assuming the statistics of impulse, the proposed receiver, after adequately adapting to all attenuating effects to measure the clipping threshold of clipper and the bit metric of decoder, is compellingly on par with its refined counterpart, which uses the statistical knowledge of impulse, under fairly general circumstances.