volume | PIER Journals

Abstract

Peak to Average Power Ratio (PAPR) is one of the serious problems in any wireless communication systems using multi carrier modulation technique like OFDM, which reduces the efficiency of transmit high power amplifier. In this paper, proposed scheme will be introduced that combines interleaving technique and companding technique to reduce PAPR. This scheme will be compared with the system that uses other technique for reduction which is the clipping method. By using proposed scheme, the PAPR of OFDM signal can be reduced by 6.3 dB over the original system, i.e., without PAPR reduction. Also, SNR decreases by more than 5 dB for Bit Error Rate(BER) of 10^-3 over the original system. Moreover, the proposed method gives improvement more than 4.5 dB for BER of 10^-3 over the system that uses clipping. All these systems will be evaluated in the presence of nonlinear power amplifier.

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Dr. Hefdhallah Sakran

Dr. Mona Mohammed Shokair

Dr. Atef Elazm