Channel Estimation in CP-OQAM-OFDM Systems

Due to the insertion of cyclic prefix (CP), orthogonal-frequency-division multiplexing (OFDM) systems with offset quadrature amplitude modulation (OQAM) (OQAM-OFDM) and CP, denoted as CP-OQAM-OFDM, systems have more robustness to combat a multi-path fading channel and simpler and better receivers th...

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Bibliographic Details
Published in:IEEE transactions on signal processing 2014-11, Vol.62 (21), p.5775-5786
Main Authors: Kong, Dejin, Xia, Xiang-Gen, Jiang, Tao, Gao, Xiqi
Format: Article
Language:English
Subjects:
Channel estimation
Channels
Computer simulation
Cramer-Rao bounds
Delays
equalization
Equalizers
Estimators
Fading
filterbank multicarrier modulation
Insertion
OFDM
OQAM-OFDM
Orthogonal Frequency Division Multiplexing
Quadrature amplitude modulation
Receivers
Transaction processing
Wireless communication
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Summary:Due to the insertion of cyclic prefix (CP), orthogonal-frequency-division multiplexing (OFDM) systems with offset quadrature amplitude modulation (OQAM) (OQAM-OFDM) and CP, denoted as CP-OQAM-OFDM, systems have more robustness to combat a multi-path fading channel and simpler and better receivers than the conventional OQAM-OFDM systems. In this paper, two channel estimators, i.e., weighted least square (WLS) and pairs of pilots (POP) are presented in CP-OQAM-OFDM systems. To evaluate the proposed WLS and POP estimators, the corresponding Cramér-Rao bounds are given for comparison. In addition, the computational complexities of the proposed estimators are analyzed as well. Simulation results demonstrate that both of the proposed channel estimators can achieve good bit error rate (BER) performance.
ISSN:1053-587X
1941-0476
DOI:10.1109/TSP.2014.2356441