Paper Info
Title
A fine blind frequency offset estimator for OFDM/OQAM systems
Abstract
Like other orthogonal frequency division multiplexing (OFDM) systems, OFDM systems based on offset quadrature amplitude modulation (OFDM/OQAM) are very sensitive to carrier frequency offset. In this paper, a new blind carrier frequency offset estimator is developed for OFDM/OQAM systems by exploiting the noncircularity of the received OFDM/OQAM signal. Since the received signal exhibits conjugate cyclic frequencies at twice the carrier frequency offset, the frequency estimator is designed by maximizing a cost function expressed in terms of the sample conjugate cyclocorrelations. The theoretical asymptotic (large sample) performance analysis of the proposed estimator is established. Computer simulations are presented to illustrate the performance of the estimator. It is shown that the proposed estimator is very accurate whenever it is well initialized. Therefore, the proposed estimator appears to be very well adapted for a tracking mode rather than for an acquisition mode.
Year
DOI
Venue
2004
10.1109/TSP.2003.820062
IEEE Transactions on Signal Processing
Keywords
Field
DocType
esti- mation,new blind carrier frequency,acquisition mode,carrier frequency,orthogonal frequency division multiplexing,oqam signal,ofdm system,frequency estimator,proposed estimator,conjugate cyclocorrelation,conjugate cyclic frequency,fine blind frequency,index terms—carrier frequency offset,ofdm system.,oqam system,ofdm modulation,quadrature amplitude modulation,indexing terms,computer simulation,cost function,frequency offset
Quadrature amplitude modulation,Control theory,Frequency offset,Carrier frequency offset,Offset quadrature amplitude modulation,Orthogonal frequency-division multiplexing,Mathematics,Estimator
Journal
Volume
Issue
ISSN
52
1
1053-587X
Citations 
PageRank 
References 
28
1.57
19
Authors
2
Name
Order
Citations
PageRank
P. Ciblat119815.01
E. Serpedin255440.14