TY - JOUR
T1 - Preamble-based channel estimation in OFDM/OQAM systems
T2 - A review
AU - Kofidis, Eleftherios
AU - Katselis, Dimitrios
AU - Rontogiannis, Athanasios
AU - Theodoridis, Sergios
N1 - Funding Information:
Part of this work was done within the FP7 project PHYDYAS (Contract no: ICT-211887 ; http://www.ict-phydyas.org ). D. Katselis was additionally supported by the European Research Council under the advanced Grant LEARN, Contract 267381 , and by the Swedish Research Council under Contract 621-2010-5819 .
PY - 2013/7
Y1 - 2013/7
N2 - Filter bank-based multicarrier communications (FBMC) have recently attracted increased interest in both wired (e.g., xDSL, PLC) and wireless (e.g., cognitive radio) applications, due to their enhanced flexibility, higher spectral efficiency, and better spectral containment compared to conventional OFDM. A particular type of FBMC, the so-called FBMC/OQAM or OFDM/OQAM system, consisting of pulse shaped OFDM carrying offset QAM (OQAM) symbols, has received increasing attention due to, among other features, its higher spectral efficiency and implementation simplicity. It suffers, however, from an imaginary inter-carrier/inter-symbol interference that complicates signal processing tasks such as channel estimation. This paper focuses on channel estimation for OFDM/OQAM systems based on a known preamble. A review of the existing preamble structures and associated channel estimation methods is given, for both single- (SISO) and multiple-antenna (MIMO) systems. The various preambles are compared via simulations in both mildly and highly frequency selective channels.
AB - Filter bank-based multicarrier communications (FBMC) have recently attracted increased interest in both wired (e.g., xDSL, PLC) and wireless (e.g., cognitive radio) applications, due to their enhanced flexibility, higher spectral efficiency, and better spectral containment compared to conventional OFDM. A particular type of FBMC, the so-called FBMC/OQAM or OFDM/OQAM system, consisting of pulse shaped OFDM carrying offset QAM (OQAM) symbols, has received increasing attention due to, among other features, its higher spectral efficiency and implementation simplicity. It suffers, however, from an imaginary inter-carrier/inter-symbol interference that complicates signal processing tasks such as channel estimation. This paper focuses on channel estimation for OFDM/OQAM systems based on a known preamble. A review of the existing preamble structures and associated channel estimation methods is given, for both single- (SISO) and multiple-antenna (MIMO) systems. The various preambles are compared via simulations in both mildly and highly frequency selective channels.
KW - Channel estimation
KW - Filter bank-based multicarrier (FBMC)
KW - Intrinsic interference
KW - Offset QAM (OQAM)
KW - Orthogonal frequency division multiplexing (OFDM)
KW - Preamble
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U2 - 10.1016/j.sigpro.2013.01.013
DO - 10.1016/j.sigpro.2013.01.013
M3 - Review article
AN - SCOPUS:84875911139
SN - 0165-1684
VL - 93
SP - 2038
EP - 2054
JO - Signal Processing
JF - Signal Processing
IS - 7
ER -