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Robust Frequency Offset Estimation with a Single Symbol for FH-OFDMA  

Yoon Dae jung (경북대학교 대학원 전자공학과)
Han Dong seog (경북대학교 전자전기공학부)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.30, no.4A, 2005 , pp. 250-258 More about this Journal
Abstract
An initial carrier frequency offset estimation algorithm is proposed for a multi-user frequency bowing orthogonal frequency division modulation-frequency division multiple access (FH-OFDMA) system with a single preamble symbol. To mitigate the effect of the frequency offset, every mobile station needs to accurately and rapidly acquire synchronization. The proposed algorithm uses only one preamble symbol in which two kinds of subcarriers are designed for coarse and fine frequency offset estimation. The non-data aided estimation using the energy spectrum is exploited for fine offset estimation, and maximum likelihood estimation using correlation for coarse offset estimation. By combining the two estimation results, an accurate frequency offset can be estimated with a single symbol. Through simulations, the performance of the proposed algorithm is evaluated by comparing estimation error variance with a conventional method.
Keywords
FH-OFDMA; multi-carrier synchronization; preamble;
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  • Reference
1 M. Luise, M. Marselli and R. Reggiannini, 'Low-complexity blind carrier frequency recovery for OFDM signals over frequencyselective radio channels,' IEEE Trans. Commun., vol. 50, pp. 11821188, July 2002
2 3GPP TS 5.101, '3rd generation partnership project; technical specifIcation group radio access networks; UE radio transmission and reception,' Mar. 2003
3 IEEE standard 802.11a, Supplement to IEEE standard for information technology tele communications and information exchange between systems local and metropolitan area networks-specifIc requirements. Part 11: wireless LAN Medium Access Control (MAC) and Physical Layer (PHY), Sep. 1999
4 M. Oerder and H. Meyr, 'Digital fIlter and square timing recovery,' IEEE Trans. Commun., vol. 36, pp 605-612, May 1988   DOI   ScienceOn
5 J. Chuang, N. Sollenberger, 'Beyond 3G: wideband wireless data access based on OFDM and dynamic packet assignment,' IEEE Commun. Mag. vol. 38, pp. 78-87, July 2000
6 802.16a Part16: 'Air interface for fIxed broadband wireless access systemsamendment 2: medium access control modifications and additional physical layer specifIcations for 211 GHz,' Apr. 2003
7 Flarion Technologies Inc, 'Communications system employing orthogonal frequency division multiplexing based spread spectrum multiple access,' US Patent 6,553,019 B1, Apr. 2003
8 K. Fazel, S. Kaiser, Multi-Carrier and Spread Spectrum System, Wiley, England, Feb. 2003
9 H. V. Poor, An Introduction to Signal and Estimation 2nd ed., Springer-Verlag, NY, Mar. 1994
10 R. V. Nee and R. Prasad, OFDM Wireless multimedia communications, AH, NY, Dec. 2000
11 G. J. Pottie, A. R. Calderbank, 'Channel coding strategies for cellular radio,' IEEE Trans. Veh. Technol., vol. 44, pp. 763-769 Nov. 1995   DOI   ScienceOn
12 이석규, 장경희, 황승구, 'ETRI 4세대 무선전송 시스PA:HMA 개발동향', 전자동향분석 제 17권, 5호, pp. 15-25, 2002년 10월
13 J. J. Van de Beek, M. Sandell, and P. O. Borjesson, 'ML estimation of time and frequency offset in OFDM systems,' IEEE Trans. Signal Processing, vol. 45, pp. 1800-1805, July 1997   DOI   ScienceOn
14 Flarion Technologies Inc., 'OFDM for mobile data communications,' Release Paper, Mar. 2003