Open AccessA new FWHT‐CMF‐DFE based approach for channel equalization in CP‐free OFDM systems
Author(s) -
Aykırı Gazihan,
Avcı Büşra,
Savaşcıhabeş Asuman,
Özen Ali
Publication year - 2021
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/cmu2.12248
Subject(s) - orthogonal frequency division multiplexing , cyclic prefix , computer science , spectral efficiency , fading , robustness (evolution) , multipath propagation , bit error rate , electronic engineering , equalization (audio) , frequency domain , algorithm , channel (broadcasting) , telecommunications , engineering , biochemistry , chemistry , gene , computer vision
Abstract Orthogonal frequency division multiplexing (OFDM) has been widely used in wireless communication systems due to its robustness against the frequency selectivity of fading channels. It provides optimal performance and it also meets the requirements of the next generation communication systems. Although OFDM has these advantages, its spectrum efficiency is usually degraded significantly due to the use of cyclic prefix (CP). In this paper, motivated to deal with this issue, the combined structure of Fast Walsh‐Hadamard Transform (FWHT) and Time Domain Equalizer (TDE) is proposed to use in CP‐free OFDM systems. The results validated by Monte Carlo simulations decipher the improved performances in terms of spectral efficiencies, bit error rate, peak to average power ratio and out of band emission for using this structure over frequency selective multipath fading channels in CP‐free OFDM systems. The acquired simulation results have illustrated that the proposed method provides 20% spectral efficiency without compromising the BER performance.