Browse > Article

Design of Efficient frequency Offset Estimator for MB-OFDM based UWB Systems  

Kim, Kil-Hwan (연세대학교 전자전기공학과 정보통신SoC설계 연구실)
Jung, Yun-Ho (한국항공대학교 항공전자 및 정보통신공학부)
Kim, Jae-Seok (연세대학교 전자전기공학과)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.34, no.3C, 2009 , pp. 311-321 More about this Journal
Abstract
This paper proposes an efficient frequency offset estimation algorithm for MB-OFDM based UWB systems. The time-frequency interleaving in MB-OFDM extends the time-interval between two transmitted OFDM symbols in the same sub-band. The extended time-interval causes not only the degradation of the system performance by reducing frequency offset estimation range, but also the increase of the hardware complexity by requiring the larger number of storing samples. The proposed estimation algorithm expands the estimation range by applying the proposed sign detection scheme. Simulation results show that the estimation range is increased above 30 ppm compared with a conventional auto-correlation based scheme. The estimation is performed on only one sub-band, and the frequency offsets of the others are calculated by relation to center frequency. This way reduced the number of the storing samples by about l/3. The frequency offset estimator with the proposed algorithm was designed into the architecture which minimizes hardware overhead by time-sharing operators and memory units, and which was synthesized to gate-level circuits using $0.13{\mu}m$ CMOS technology, and the total gates were about 47K.
Keywords
MB-OFDM; UWB; frequency offset; TFI; estimator;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 MultiBand OFDM Alliance(MBOA) Special Interest Group(SIG) / WiMedia Alliance, Inc.(WiMedia), 'MultiBand OFDM Physical Layer Specification,' Release 1.1, July 14, 2005
2 Federal Communications Commission, 'Revision of Part 15 of the Commission's rules regarding ultra-wideband transmission,' ET Docket 98-153, April 2002
3 A. Batra, J. Balakrishnan, G. R. Aiello, J. R. Foerster, and A. Dabak, "Design of a multiband OFDM system for realistic UWB channel environments," IEEE Trans. Microw. Theory & Technol., vol. 52, no. 9, pp. 2123-2138, Sept. 2004   DOI   ScienceOn
4 C. W. Yak, Z. Lei, and T. T. Tjhung, 'Maximum Likelihood Frequency Offset Estimation & Crammer Rao Bound for Ultra-Wideband (UWB) Muti-Band OFDM Systems,' in Proc. IEEE VTC 2006-Spring, pp. 2373-2377, May 2006
5 C. Mishra, A. Valdes-Garcia, F. Bahmani, A. Batra, E. S\nchez-Sinencio, and J. Silva Martinez, "Frequency Planning and Synthesizer Architectures for Multiband OFDM UWB Radios," IEEE Trans. Microw. Theory & Technol., vol. 53, no. 12, pp. 3744-3756, Dec. 2005   DOI   ScienceOn
6 A. Batra et al., 'MultiBand OFDM physical layer proposal for IEEE 802.15 Task Group 3a,' IEEE P802.15-03/142r2-TG3a, Sept. 2004
7 B. Sahu, D. Sen, R. V. Kumar, and S. Chakrabrti, 'A Frequency Offset Estimation Scheme for OFDM Based UWB Systems,' in Proc. IEEE TENCON 2006, pp. 1-4, Nov. 2006
8 C. F. Liang, S. I. Liu, Y. H. Chen, T. Y. Yang, and G. K. Ma, "A 14-band Frequency Synthesizer for MB-OFDM UWB Application," in Proc. IEEE ISSCC 2006, pp 428-437, Feb. 2006   DOI
9 김정주, 왕우봉, 장경희, 'UWB MB-OFDM 시스템을 위한 심볼 타이망 및 반송파 주파수 오프셋 추정 기법,' 한국통신학회논문지, vol. 31, no. 3A, pp. 232-239, Mar. 2006
10 P. H. Moose, 'A technique for orthogonal frequency division multiplexing frequency offset correction', IEEE Trans. Commun., vol. 45, no. 12, Dec. 1997
11 S. M. Kay, 'Fundamentals of statistical Signal Processing: Estimation Theory,' Prentice Hall PTR, 1993
12 J. R. Foerster, et al., 'Channel modeling sub-committee report final,' IEEE P802.15 Working Group for Wireless Personal Area Networks(WPANs). Feb. 2003