Time and Frequency Synchronization with Channel
Estimation for SC-FDMA Systems Over Time-Varying
Published online: 29 April 2017
Ó Springer Science+Business Media New York 2017
Abstract The constant amplitude zero autocorrelation sequence based synchronization
and its usage in the block-type channel estimation for the single carrier frequency division
multiple access (SC-FDMA) systems are vulnerable to the time-varying channels.
Therefore, the channel estimation errors limit the performance of SC-FDMA systems in
fast fading environments and result an irreducible error ﬂoor. In this paper, cyclic preﬁx
based maximum likelihood estimator of time/frequency synchronization with comb-type
channel estimation for the SC-FDMA systems are proposed to track the channel variations.
Moreover, the residual time/frequency offsets calculations are derived for SC-FDMA
systems. Simulation results conﬁrm and illustrate that the proposed receiver is capable of
tracking fast fading channel parameters and improving the overall performance as com-
pared with the conventional receiver.
Keywords SC-FDMA Á LTE Á CAZAC Á Synchronization Á Channel estimation Á Block-
type allocation Á Comb-type allocation Á High mobility
To reduce the high peak-to-average power ratio (PAPR) in orthogonal frequency-division
multiple access (OFDMA) system, single-carrier frequency division multiple access (SC-
FDMA) that employs extra discrete Fourier transform (DFT) precoding at the transmitter
& Niyazi Odabas¸ıog
Department of Electrical and Electronics Engineering, Istanbul University, Istanbul, Turkey
Wireless Pers Commun (2017) 96:163–181