Abstract

Orthogonal Frequency Division Multiplexing OFDM has several attributes which make it a preferred modulation scheme for high speed wireless communication Orthogonal Frequency Division Multiplexing OFDM has been currently under intense research for broadband wireless transmission due to its robustness against multipath fading However OFDM signals have a problem with high Peak-to- Average power ratio PAPR and thus a power amplifier must be carefully manufactured to have a linear input-output characteristic or to have a large input power back-off In recent years many peak-to-average power ratio PAPR reduction techniques have been proposed for orthogonal frequency division multiplexing OFDM signals Among various techniques the clipping and filtering technique has been considered as a practical scheme and widely used owing to its non-expansion of bandwidth low computational complexity and simplicity in implementation without receiverside cooperation