Peak to Average Power Ratio Reduction of OFDM Signals Using Clipping and Iterative Processing Methods
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How to Cite

Peak to Average Power Ratio Reduction of OFDM Signals Using Clipping and Iterative Processing Methods. (2019). Al-Khwarizmi Engineering Journal, 4(4), 82-90. https://alkej.uobaghdad.edu.iq/index.php/alkej/article/view/611

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Abstract

One of the serious problems in any wireless communication system using multi carrier modulation technique like Orthogonal Frequency Division Multiplexing (OFDM) is its Peak to Average Power Ratio (PAPR).It limits the transmission power due to the limitation of dynamic range of Analog to Digital Converter and Digital to Analog Converter (ADC/DAC) and power amplifiers at the transmitter, which in turn sets the limit over maximum achievable rate.

        This issue is especially important for mobile terminals to sustain longer battery life time. Therefore reducing PAPR can be regarded as an important issue to realize efficient and affordable mobile communication services.

        This paper presents an efficient PAPR reduction method for OFDM signal. This method is based on clipping and iterative processing. Iterative processing is performed to limit PAPR in time domain but the subtraction process of the peak that over PAPR threshold with the original signal is done in frequency domain, not in time like usual clipping technique. The results of this method is capable of reducing the PAPR significantly with minimum bit error rate (BER) degradation.

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References

[1] G. Redaelli et al., "Analysis of two digital adaptive pre-correctors for non-linearity in OFDM systems", Proceedings of 1999 IEEE international conference on communications, vol.1, 172-7, June 1999.
[2] R. Van. Nee and R. Prasad, "OFDM for wireless multimedia communications", Artech House, 2000.
[3] Seung Hee Han and Jae Hong Lee, "An overview of peak to average power ratio reduction techniques for multicarrier transmission", IEEE wireless communication, April 2005.
[4] Cimini, Leonard, "Analysis and Simulation of Digital Mobile Channel using Orthogonal Frequency Division Multiplexing ", IEEE Trans. Comm.33, No.7, July 1985, pp665-675.
[5] Louis Litwan and Michael Pugel, " The Principles of OFDM", RF Signal Processing, January 2001.
[6] Mohanad E. Al-Madi, "HF Data Transmission Using Orthogonal Frequency Division Multiplexing ", Msc Thesis, College of Engineering, Al-Mustansirya University,2004.
[7] Azhar Qasim Taha," Performance analysis of ICC technique for OFDM PAPR reduction and its application over BTC", Master degree project Stockholm, Sweden, 2006.

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