A modified Iterative Amplitude clipping and filtering technique for PAPR reduction in OFDM systems

Orthogonal frequency multiplexing (OFDM) is a promising technique for high data-bit-rate in wireless communication systems. However, one of the major drawback of OFDM is high peak-to-average power ratio (PAPR). In this paper, we propose modified Iterative Amplitude clipping and filtering (IACF) technique to reduce the PAPR in OFDM signal. This paper evaluates PAPR reduction effect with a graded band-limiting filter in the iterative clipping and filtering method. The computer simulation result shows that the proposed method achieves target PAPR using fewer iteration numbers as in conventional method and improves the PAPR and BER performance as compared to conventional Amplitude clipping and filtering (AFC) method.