Title :
The Frequency Offset Estimator Based on All-Phase FFT for OFDM Systems
Author :
Wen, Zhang ; Shanlin, Sun
Author_Institution :
Guilin Coll. of Aerosp. Technol., Guilin, China
Abstract :
Inter-Carriers Interference (ICI) caused by frequency offset can result in the performance loss of the OFDM system. Aiming at this problem, the method of All Phase FFT is proposed for reducing the ICI and estimating frequency offset (CFO). Since the ICI energy and signal energy both contribute coherently to the estimator, the algorithm generates extremely accurate estimates even when the offset is far too great to demodulate the data values.
Keywords :
OFDM modulation; fast Fourier transforms; frequency estimation; intercarrier interference; ICI energy; OFDM systems; all-phase FFT; frequency offset estimator; inter-carriers interference; signal energy; Educational institutions; Frequency estimation; Interference; Interpolation; OFDM; Phase estimation; Sequences; Signal generators; Sun; System performance; All-Phase Frequency Offset Estimator; Frequency Offset; Inter-carrier Interference (ICI); OFDM;
Conference_Titel :
Environmental Science and Information Application Technology, 2009. ESIAT 2009. International Conference on
Conference_Location :
Wuhan
Print_ISBN :
978-0-7695-3682-8
DOI :
10.1109/ESIAT.2009.350
