EE Seminar: PAPR Reduction in Single-Carrier Modulation with Markovian Constraint

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Speaker: Yonathan Tate,
M.Sc. student under the supervision of Dr. Dan Raphaeli

Wednesday, March 23, 2016 at 15:00
Room 011, Kitot Bldg., Faculty of Engineering

PAPR Reduction in Single-Carrier Modulation with Markovian Constraint

Abstract

The peak to average power ratio (PAPR) characteristic of a communication signal is of importance when power amplifiers (PA) are in need. In such cases, the span of the signal’s power must reside inside the linear region of the PA in order to avoid signal saturation, which leads to both in-band and out-band interferences. When the PAPR is high, the average power must therefore be backed-off (BO) to avoid saturation, and in turn the transmission becomes more error-prone. Such difficulties exist for example in satellite communication, where single carrier transmission with high spectral efficiency is common.
In this work we propose a novel approach for shaping for PAPR reduction which on one hand achieves better PAPR reduction than known techniques, and on the other hand is practical in the sense of integrating well with modern iterative error correcting schemes, specifically turbo codes. The proposed approach is based on using carefully selective puncturing of ECC parity bits to achieve non-equiprobable symbol signaling, which is designed to reduce the PAPR. The proposed technique has been tested in simulations on a 16-QAM constellation with various data rates, and an overall gain of over 1.6 dB is demonstrated in some cases against non-shaped signaling.