A Technique to Reduce Peak to Average Ratio (PAPR) in OFDM Using Recursive Clipping and Filtering Method

Abstract

In life, communication is one of the most crucial things. The field of communications has expanded quickly due to aging populations and their increasing demands. Originally conveyed in the analog domain, signals are now increasingly being sent in the digital domain. Even single-carrier waves are being replaced with several carriers for better transmission. This research proposes an amplitude clipping and filtering method that significantly improves PAPR reduction while only slightly raising BER when compared to an existing method.

For the future generation of wireless communications, an Orthogonal Frequency Division Multiplexing (OFDM) scheme is anticipated to be an effective method. However, the fundamental disadvantage of the OFDM system is its high Peak to Average Ratio (PAPR), which reduces the efficiency of the transmitter power and results in subpar system performance. Several works on clipping approach have been proposed to reduce the PAPR of OFDM signal. The clipping method is used in this paper to increase the PAPR and Bit Error Rate (BER) performance. The results have demonstrated that using recursive clipping and filtering reduces the original signal's 11.5 dB PAPR to 4.77 dB. As a result, BER is also dramatically raised. The effect of PAPR on BER under AWGN channel for QPSK scheme with 128 points of OFDM is gradually studied in this study using MATLAB simulation. The influence of OFDM signal traveling through the High Power Amplifier is also analyzed (HPA). The PAPR reduction method utilizing recursive clipping and filtering (RCF) is then put into practice.