Provided by: International Journal of Advances in Engineering & Technology (IJAET)
Date Added: May 2012
The main drawback of OFDM signals demonstrates high fluctuations termed as Peak to Average Power Ratio (PAPR). A signal with high PAPR when amplified by a Power Amplifier (PA) without any special treatment results in severe impairments, i.e., non-linear distortions. Hence this non linearity destroys the orthogonality of the OFDM signal and introduces out-of-band radiation and in band distortions. The existing method doesn't have high capability of PAPR reduction with significant high Bit Error Rate (BER) degradation. Hence this proposed CAP-PT (Clipping, Amplification and Peak Windowing/Partial Transmit) method combines the effect of clipping the peak signals and amplifies the signals that have low amplitude.