Open AccessLow‐complexity peak‐to‐average power ratio reduction method for orthogonal frequency‐division multiplexing communications
Author(s) -
Wang Yuewen,
Akansu Ali N.
Publication year - 2015
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.2015.0194
Subject(s) - orthogonal frequency division multiplexing , fast fourier transform , reduction (mathematics) , algorithm , computer science , transmission (telecommunications) , bit error rate , figure of merit , mathematics , inverse , electronic engineering , telecommunications , decoding methods , channel (broadcasting) , geometry , engineering , computer vision
The high peak‐to‐average power ratio (PAPR) of the transmitted signal is a major drawback of multicarrier transmission such as orthogonal frequency‐division multiplexing OFDM. A plethora of PAPR reduction techniques has been reported in the literature. Some of the techniques modify the phase and/or amplitude of symbols in the original symbol alphabet (SA) such as selected mapping and partial transmit sequences techniques. However, such methods have shortcomings of a heavy computational burden caused by required multiple inverse fast‐Fourier transform (IFFT) operations and bit error rate performance degradation due to side information (SI). In this study, a low‐complexity PAPR reduction framework is proposed to jointly modify phase and amplitude values of the original symbols in the alphabet. This framework utilises only one IFFT/FFT operator pair for transmultiplexing of symbols without any SI. The merit of the proposed method to design a SA modifier matrix (SAM) for PAPR reduction is shown through performance comparisons for the application scenarios presented in this study.