DocumentCode :
428011
Title :
Carrier frequency offset estimation for OFDM systems with subcarriers
Author :
Zhu, Jie ; Lee, Wookwon
Author_Institution :
Dept. of Electr. Eng., Arkansas Univ., Fayetteville, AR, USA
Volume :
1
fYear :
2004
fDate :
26-29 Sept. 2004
Firstpage :
553
Abstract :
In this paper, we propose an iterative CFO estimator using a specific pattern of alternating pilots and subcarriers in training OFDM block. One major advantage of the proposed estimator is its simple structure. The proposed method estimates the CFO in an iterative fashion based on the signals at the subcarriers and use of the estimated CFO to correct the carrier frequency for the next iteration. It is found that with the proposed scheme, the final estimation accuracy depends only on the signal to noise ratio and is insensitive to the initial frequency offset. Simulation results demonstrate that the algorithm can achieve relatively high estimation accuracy within a few iterations in frequency-selective fading channels.
Keywords :
OFDM modulation; channel estimation; fading channels; frequency estimation; interference (signal); iterative methods; OFDM systems; alternating pilots; carrier frequency iteration; carrier frequency offset estimation; estimator structure; final estimation accuracy; frequency-selective fading channels; initial frequency offset; iterative CFO estimator; signal to noise ratio; simulation; subcarriers; training OFDM block; Data communication; Error correction; Frequency estimation; Frequency-selective fading channels; Interference; Iterative methods; Local oscillators; OFDM; Signal to noise ratio; Transmitters;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Vehicular Technology Conference, 2004. VTC2004-Fall. 2004 IEEE 60th
ISSN :
1090-3038
Print_ISBN :
0-7803-8521-7
Type :
conf
DOI :
10.1109/VETECF.2004.1400068
Filename :
1400068
Link To Document :
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