TY - JOUR
T1 - A Family of MMSE-Based Decision Feedback Equalizers and Their Properties for FBMC/OQAM Systems
AU - Lai, Kuei Chiang
AU - Huang, Yung Jie
AU - Chen, Chun Ting
AU - Lin, Cheng Feng
N1 - Funding Information:
Manuscript received July 25, 2018; revised November 7, 2018; accepted December 11, 2018. Date of publication January 9, 2019; date of current version March 14, 2019. This work was supported by the Ministry of Science and Technology, Taiwan, R.O.C., under Grants MOST 104-2221-E-006-074 and 107-2218-E-006-037. The review of this paper was coordinated by Prof. K. Adachi. (Corresponding author: Kuei-Chiang Lai.) K.-C. Lai is with the Department of Electrical Engineering, National Cheng Kung University, Tainan 701, Taiwan (e-mail:,[email protected]).
Publisher Copyright:
© 1967-2012 IEEE.
PY - 2019/3
Y1 - 2019/3
N2 - Filter bank multi-carrier based on offset quadrature amplitude modulation (FBMC/OQAM) suffers from inter-symbol interference and inter-subchannel interference in multi-path fading channels. By exploiting the special structures of the FBMC/OQAM signal and the resulting correlation matrix and assuming perfect estimation of channel and noise power, we study the properties of the decision feedback equalizer (DFE) designed by the minimum mean square error criterion. The study leads to efficient and mathematically equivalent computation of DFE coefficients. Consequently, the DFE requires a smaller complexity in computing the equalizer coefficients than the linear equalizer, while achieving a significant performance gain in highly frequency-selective channels. Building upon the proposed efficient computation of DFE, we develop DFE-based detectors - namely, two-stage DFE and multi-band DFE - so that a better detection performance can be obtained more efficiently. Complexity analysis and simulation results demonstrate the efficacy of the proposed computation method and the DFE-based detectors.
AB - Filter bank multi-carrier based on offset quadrature amplitude modulation (FBMC/OQAM) suffers from inter-symbol interference and inter-subchannel interference in multi-path fading channels. By exploiting the special structures of the FBMC/OQAM signal and the resulting correlation matrix and assuming perfect estimation of channel and noise power, we study the properties of the decision feedback equalizer (DFE) designed by the minimum mean square error criterion. The study leads to efficient and mathematically equivalent computation of DFE coefficients. Consequently, the DFE requires a smaller complexity in computing the equalizer coefficients than the linear equalizer, while achieving a significant performance gain in highly frequency-selective channels. Building upon the proposed efficient computation of DFE, we develop DFE-based detectors - namely, two-stage DFE and multi-band DFE - so that a better detection performance can be obtained more efficiently. Complexity analysis and simulation results demonstrate the efficacy of the proposed computation method and the DFE-based detectors.
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U2 - 10.1109/TVT.2019.2891744
DO - 10.1109/TVT.2019.2891744
M3 - Article
AN - SCOPUS:85063262749
SN - 0018-9545
VL - 68
SP - 2346
EP - 2360
JO - IEEE Transactions on Vehicular Technology
JF - IEEE Transactions on Vehicular Technology
IS - 3
M1 - 8606267
ER -