Low complexity Wizard amplitude shaping system for peak‐to‐average power ratio reduction. Issue 18 (1st December 2013)

• Record Type: Journal Article
• Authors: Saad, Waleed; El‐Fishawy, Nawal; El‐Rabaie, Sayed; Shokair, Mona
• Is Part Of: IET communications. Volume 7:Issue 18(2013)
• Page Start: 2005
• Page End: 2014
• Publication Date: 2013-12-01
• Subjects: AWGN channels -- encoding -- error statistics -- fading channels -- multipath channels -- OFDM modulation -- time‐frequency analysis; low complexity Wizard amplitude shaping system -- peak‐to‐average power ratio reduction -- orthogonal frequency division multiplexing -- digital data encoding -- multiple carrier frequency -- wide‐band digital communication -- PAPR value -- Wizard amplitude shaping encoder -- mathematical analysis -- in‐band distortion -- error vector magnitude -- time‐frequency domain -- OFDM system -- bit error rate -- additive white Gaussian noise channel -- multipath fading channel; Telecommunication systems -- Periodicals; Speech processing systems -- Periodicals; 621.38205
• DOI: 10.1049/iet-com.2013.0024
• Languages: English
• ISSNs: 1751-8628

Abstract

Abstract : Orthogonal frequency division multiplexing (OFDM) is a method of encoding digital data on multiple carrier frequencies. OFDM has developed into a popular scheme for wide‐band digital communication. Despite its advantages, it has a major drawback of its high peak‐to‐average power ratio (PAPR) value which degrades its efficiency and increases its cost. In this study, two proposed systems are discussed to reduce the PAPR value. They depend on a signal conversion to an approximated triangle signal by means of a proposed Wizard amplitude shaping encoder. The whole characteristics mathematical analysis are presented for the proposed systems. In addition, the complexity evaluations, reliability, in‐band distortion; in terms of error vector magnitude, time and frequency domain behaviours are explained. The two proposed systems are compared with the conventional OFDM system in terms of PAPR and bit error rate under additive white Gaussian noise channel and multipath fading channels. Furthermore, the impacts of the proposed schemes design parameters, are studied.