Open AccessLocalised discrete Fourier transform‐spread M ‐ary amplitude shift keying orthogonal frequency division multiplexing with Hermitian symmetry for peak‐to‐average power ratio reduction
Author(s) -
Sung Minkyu,
Lee Jaehoon,
Jeong Jichai
Publication year - 2014
Publication title -
iet communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.355
H-Index - 62
eISSN - 1751-8636
pISSN - 1751-8628
DOI - 10.1049/iet-com.2013.0987
Subject(s) - hermitian matrix , discrete fourier transform (general) , reduction (mathematics) , orthogonal frequency division multiplexing , mathematics , fourier transform , symmetry (geometry) , discrete sine transform , power (physics) , amplitude , amplitude shift keying , physics , telecommunications , mathematical analysis , fourier analysis , computer science , fractional fourier transform , bit error rate , phase shift keying , optics , algorithm , channel (broadcasting) , quantum mechanics , pure mathematics , decoding methods , geometry
The authors propose a novel localised discrete Fourier transform (DFT) spread M ‐ary amplitude shift keying ( M ‐ASK) orthogonal frequency division multiplexing (OFDM) system with the Hermitian symmetry (DFT‐spread M ‐ASK HS OFDM) to reduce the peak‐to‐average power ratio (PAPR). Compared with the conventional OFDM and localised DFT‐spread OFDM, the proposed system has lower PAPR not only because of the DFT‐spread scheme but also its lower modulation order than other OFDM systems. The lower modulation order of the proposed system can be achieved by using the Hermitian symmetry of DFT. The simulation result shows that the localised DFT‐spread M ‐ASK HS OFDM provides a significant improvement in bit‐error‐rate and reduced PAPR.