DocumentCode :
2779998
Title :
A Pilot-Aided Frequency Offset Estimation Algorithm for OFDMA Uplink Systems
Author :
Lee, Kilbom ; Moon, Sung-Hyun ; Lee, Inkyu
Author_Institution :
Sch. of Electr. Eng., Korea Univ., Seoul, South Korea
fYear :
2012
fDate :
3-6 Sept. 2012
Firstpage :
1
Lastpage :
5
Abstract :
In this paper, we propose a pilot aided carrier frequency offset (CFO) estimation algorithm for orthogonal frequency division multiplexing access (OFDMA) uplink systems based on two consecutive received OFDMA symbols. Assuming that the channels and the CFOs are static over the two consecutive symbols, we express the second received OFDMA symbol in terms of the CFOs and the first OFDMA symbol. Based on this signal model, a new estimation algorithm which obtains the CFOs by minimizing the mean square distance between the received OFDMA symbol and its regenerated signal is provided. The simulation results show that the proposed algorithm approaches the average Cramer Rao bound for moderate and high signal to noise ratio regions. Moreover, the algorithm can be applied for any carrier assignment schemes.
Keywords :
OFDM modulation; frequency division multiple access; frequency estimation; CFO estimation algorithm; OFDMA uplink systems; average Cramer Rao bound; carrier assignment schemes; consecutive received OFDMA symbols; mean square distance; orthogonal frequency division multiplexing access uplink systems; pilot-aided frequency offset estimation algorithm; regenerated signal; signal model; signal-to-noise ratio regions; Bit error rate; Computational complexity; Estimation; OFDM; Signal to noise ratio; Vectors;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Vehicular Technology Conference (VTC Fall), 2012 IEEE
Conference_Location :
Quebec City, QC
ISSN :
1090-3038
Print_ISBN :
978-1-4673-1880-8
Electronic_ISBN :
1090-3038
Type :
conf
DOI :
10.1109/VTCFall.2012.6398887
Filename :
6398887
Link To Document :
بازگشت