Open AccessSynchronisation algorithm for OFDM/OQAM systems based on zero autocorrelation code
Author(s) -
Qian Xuewen,
Deng Yansha,
Deng Honggui,
Zhang Chaoyang,
Du Jie
Publication year - 2018
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.2017.0231
Subject(s) - algorithm , orthogonal frequency division multiplexing , autocorrelation , computer science , frequency offset , qam , carrier frequency offset , autocorrelation matrix , low density parity check code , quadrature amplitude modulation , bit error rate , decoding methods , mathematics , telecommunications , channel (broadcasting) , statistics
In this study, the authors first propose a sequence with the impulse‐like autocorrelation property named zero autocorrelation code (ZAC) for orthogonal frequency division multiplexing (OFDM) based on offset quadrature amplitude modulation (OQAM) systems. The ZAC sequence can be generated by many prototype filters such as physical layer for dynamic spectrum access and cognitive radio and isotropic orthogonal transform algorithm filters. Thus, it has a wide application range. The authors then propose a synchronisation algorithm based on the ZAC. The proposed algorithm only needs two symbols to compose the preamble while existing algorithms need at least four symbols. They further assess the synchronisation performances via computer simulation. The simulation results show that the proposed algorithm can achieve better performance in terms of root mean square error of the timing and frequency offset estimation, with a 10 dB improvement on timing offset estimation performance over Saeedi‐Sourck's algorithm when signal‐to‐noise ratio is 0 dB.