CE-OFDM: A PAPR reduction technique

Abstract

Orthogonal Frequency Division Multiplexing (OFDM) is a multi-carrier modulation technique having multiple subcarriers which can be overlapped. It finds various applications in wireless communication networks. The main advantages of OFDM are in high rate data communications; but the major hurdle is that is suffers from the Peak-to-Average Power Ratio (PAPR) problem. These causes inter modulation distortion as well as out-of-band spectral growth. Constant envelope OFDM (CE-OFDM) transforms the OFDM signal, to a signal with nearly zero dB PAPR. The performance of conventional OFDM system improves with constant envelope OFDM system. © 2011 Springer-Verlag Berlin Heidelberg.