Erasure pattern selection with active constellation extension for peak-to-average power ratio reduction in OFDM
A novel approach to the reduction of peak-to-average power ratio (PAPR) in orthogonal frequency-division multiplexing (OFDM) systems is presented here, which is a combination of erasure pattern selection (EPS) and generalized active constellation extension (ACE). The former introduces redundancy into the data of an OFDM system by using an overcomplete expansion, or frame. The redundancy serves the dual purpose of error correction and PAPR reduction. The latter predistorts the signal in a controlled way in order to reduce the symbols degradation due to clipping. Extensive simulations in additive white Gaussian noise (AWGN) channel show how this approach can improve the PAPR reduction without degrading the bit error rate (BER) performance.