On the contribution of power variance in PAPR reduction for OFDM signals

Authors:
Ibrahim M. Hussain;Imran A. Tasadduq;Abdul-Rahim Ahmad
Affiliations:
Department of Computer Engineering, Sir Syed University of Engineering and Technology, University Road, 75300 Karachi, Pakistan;Department of Computer Engineering, Umm Al-Qura University, Makkah Al-Mukerrimah, Saudi Arabia;Systems Design Engineering, University of Waterloo, Waterloo, ON, Canada
Venue:
International Journal of Autonomous and Adaptive Communications Systems
Year:
2013

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Abstract

In various literatures, it has been argued that the power variance PV can be used as a sound model of peak-to-average power ratio PAPR for decisions aimed at reducing the power of the transmitted orthogonal frequency division multiplexing OFDM signals. Hence, it has been argued in the past that the PV is a good measure when it comes to power efficiency of OFDM signals. We argue that this may not be always true and that the PV-based power reduction may give misleading results in efforts aimed at PAPR reduction. We support our argument using simulation results. Furthermore, we show that the PV-based comparison in selected mapping reduction technique gives a degraded PAPR performance compared to the actual PAPR-based comparison.