Title :
A Low-Complexity Carrier Frequency Offset Estimator for OFDM System with Virtual Subcarriers
Author :
Feng, Shu ; Shu Feng
Author_Institution :
Dept. of Commun. Eng., Nanjing Univ. of Sci. & Technol., Nanjing
Abstract :
A maximum likelihood (ML) estimator of carrier frequency offset (CFO) based on virtual carriers is firstly proposed in [1]. Its main disadvantage is large computational amount. By IFFT and piecewise searching techniques, its complexity is significantly reduced. Simulation results in AWGN and Typical Urban (TU) channels show that the simplified ML estimator has low complexity and achieves the same performance as the original one.
Keywords :
OFDM modulation; communication complexity; fast Fourier transforms; frequency estimation; maximum likelihood estimation; radio access networks; IEEE 802.16a; IFFT; OFDM system; carrier frequency offset; low-complexity CFO estimator; maximum likelihood estimator; piecewise searching techniques; virtual subcarriers; AWGN; Additive noise; Computational modeling; Discrete Fourier transforms; Frequency division multiplexing; Frequency estimation; Laboratories; Maximum likelihood estimation; Mobile communication; OFDM;
Conference_Titel :
Circuits and Systems for Communications, 2008. ICCSC 2008. 4th IEEE International Conference on
Conference_Location :
Shanghai
Print_ISBN :
978-1-4244-1707-0
Electronic_ISBN :
978-1-4244-1708-7
DOI :
10.1109/ICCSC.2008.11
