Walsh Hadamard Transform: A new approach for PAPR reduction in OFDM

OFDM and MC-CDMA are multicarriercommunication techniques which are used in bothwired and wireless communication. OFDM is thetime domain signal which is a sum of severalsinusoids and due to this sinusoids Peak to AveragePower Ratio (PAPR) of OFDM signal increases. Due to this transmission is not effective so PAPR is major drawback of OFDM. There are several PAPR reduction techniques but, pre-coding techniques shows better result. This paper represents anew pre-coding technique-Walsh Hadamard Transform (WHT). From the obtained results we can conclude that WHT is attractive solution to PAPR problems of OFDM signals as compared to other pre-coding techniques