Clipping noise mitigation with capacity approaching FEC codes for PAPR reduction of OFDM signals

Abstract

By virtue of its simplicity, clipping appears to be one of the most attractive methods to mitigate Peak to Average Power Ratio (PAPR) in OFDM systems. After positioning clipping in a new classification of PAPR reduction methods, this article focuses on the performance of clipped OFDM at low signal to noise ratio, typical of capacity approaching forward error correcting coded systems. A lower bound on the BER performance of clipped coded OFDM is given and shown to be consistent with the genie aided performance of the iterative clipping noise cancellation receiver. Finally, numerical results on the BER performance of a clipped LDPC coded OFDM system are provided.1