Title :
An improved method for OFDM carrier frequency offset estimation
Author :
Jijun Zheng ; Weile Zhu
Author_Institution :
Univ. of Electron. Sci. & Technol. of China, Chengdu
Abstract :
An efficient maximum likelihood estimator has been proposed by Moose [4] for carrier frequency estimation in orthogonal frequency division multiplexing systems. The scheme is based on the observation of two consecutive and identical symbols in the frequency domain and its estimation range is less than or equal to +0.5 of the subcarrier spacing. In this paper, we extend the algorithm by using training symbols in the time-domain. It can widen the estimation range and the performance is the same as the Moose algorithm at the cost of increasing the computational complexity.
Keywords :
OFDM modulation; computational complexity; maximum likelihood estimation; subcarrier multiplexing; time-domain analysis; Moose algorithm; OFDM carrier frequency offset estimation; computational complexity; maximum likelihood estimator; orthogonal frequency division multiplexing system; subcarrier spacing; time-domain analysis; training symbols;
Conference_Titel :
Communications, Circuits and Systems, 2007. ICCCAS 2007. International Conference on
Conference_Location :
Kokura
Print_ISBN :
978-1-4244-1473-4
DOI :
10.1109/ICCCAS.2007.6250052
