A Novel FFT-Based Frequency Offset Estimator for OFDM Systems
This paper proposes a novel frequency offset (FO) estimator for orthogonal frequency division multiplexing. Simplicity is most significant feature of this algorithm and can be repeated to achieve acceptable accuracy. Also fractional and integer part of FO is estimated jointly with use of the same algorithm. To do so, instead of using conventional algorithms that usually use correlation function, we use DFT of received signal. Therefore, complexity will be reduced and we can do synchronization procedure by the same hardware that is used to demodulate OFDM symbol. Finally, computer simulation shows that the accuracy of this method is better than other conventional methods.
[1] J. A. C. Bingham, "Multicarrier modulation for data transmission: An
idea whose time has come," IEEE Commun. Mag., vol. 28, no. 5, pp. 5-
14, May 1990.
[2] P. Moose, "A technique for orthogonal frequency division multiplexing
frequency offset correction," IEEE Trans. Commun., vol. 42, no. 10,pp.
2908-2914, Oct. 1994.
[3] R. van Nee and R. Prasad, OFDM for Multimedia Communications,
Boston: Artech-House, 2000.
[4] K.W. Yip et al., "Design of multiplierless correlators for Timing
synchronization in IEEE 802.11a Wireless LANs", IEEE Transactions
on Consumer Electronics, vol.49, No.1, pp.107ÔÇö114, Feb. 2003.
[5] B.Y. Prasetyo, F. Said and A.H. Aghvami, "Fast burst synchronization
technique for OFDM-WLAN systems", IEE Proc. Commun., vol.147,
No. 5, pp.292ÔÇö297, Oct. 2000.
[6] M. Sandell, J.V. Beek, and P.O. Borjession, "Timing and frequency
synchronization in OFDM systems using the cyclic prefix," Proc.
International Symposium on Synchronization, Essen, Germany,
December 14-15, 1995, pp.16-19.
[7] T.M. Schmidl and D.C. Cox, "Robust frequency and timing
synchronization for OFDM," IEEE Trans. Commun., vol.45, pp.1613-
1621, Dec, 1997.
[8] H. Minn, M. Zeng, and V.K. Bhargava, "On timing offset estimation for
OFDM system," IEEE Comm. Lett., vol.4, pp.242-244, July 2000.
[9] J. Lee, H. Lou, D. Toumpakaris, and J. M. Cioffi, "A blind frequency
tracking algorithm for OFDM transmission over frequency selective
channels," in Proc. IEEE Veh. Technol. Conf. 2004-Fall, 2004.
[10] M. Morelli, A. N. D-Andrea, and U. Mengali, "Frequency ambiguity
resolution in OFDM systems," IEEE Commun. Lett., vol. 4, pp. 134-
136, Apr. 2000.
[11] T. Pollet, P. Spruyt, and M. Moeneclaey, "The BER performance of
OFDM systems using nonsynchronized sampling," in Proc. Global
Telecommunications Conf., San Francisco, CA, Nov. 1994, pp. 253-
257.
[12] Alan V. Oppenheim and Ronald W. Schafer, Discrete-Time Signal
Processing, Prentice Hall, 1999.
[13] J. V. D. Beek, M. Sandell, and P. 0. Borjesson, "ML estimation of time
and frequency offset in OFDM systems", IEEE Transactions on Signal
Processing, Vol. 45, No. 7, July 1997, pp. 1800-1805.
[14] M. Makundi, A. Hjorungnes, T. I. Loakso, "An Interpolation-Based
Frequency-Synchronization Scheme for OFDM Systems," IEEE 6th
Workshop on Signal Processing Advances in Wireless
Communications, 2005.
[15] IEEE 802.11a, Part 11: wireless LAN Medium Access Control (MAC)
and Physical Layer (PHY) specifications: High-speed physical layer in
the 5 GHz band, Supplement to IEEE standard for information
technology telecommunications and information exchange between
systems - local and metropolitan area networks - specific requirements,
1999.
[16] J. Medbo and P. Schramm, "Channel models for HiperLAN/2 in
different indoor scenarios," ETSI BRAN, Technical Report 3ERI085B,
1998.
[17] K. Shi, and E. Serpedin, "A Robust Metric for Coarse Frame and
Carrier Synchronization of OFDM Systems", in Proc. of The 36th
Asilomar Conference on Signals, System and Computers, Vol. 2, 3-6
Nov. 2002, pp. 1827-1831.
[1] J. A. C. Bingham, "Multicarrier modulation for data transmission: An
idea whose time has come," IEEE Commun. Mag., vol. 28, no. 5, pp. 5-
14, May 1990.
[2] P. Moose, "A technique for orthogonal frequency division multiplexing
frequency offset correction," IEEE Trans. Commun., vol. 42, no. 10,pp.
2908-2914, Oct. 1994.
[3] R. van Nee and R. Prasad, OFDM for Multimedia Communications,
Boston: Artech-House, 2000.
[4] K.W. Yip et al., "Design of multiplierless correlators for Timing
synchronization in IEEE 802.11a Wireless LANs", IEEE Transactions
on Consumer Electronics, vol.49, No.1, pp.107ÔÇö114, Feb. 2003.
[5] B.Y. Prasetyo, F. Said and A.H. Aghvami, "Fast burst synchronization
technique for OFDM-WLAN systems", IEE Proc. Commun., vol.147,
No. 5, pp.292ÔÇö297, Oct. 2000.
[6] M. Sandell, J.V. Beek, and P.O. Borjession, "Timing and frequency
synchronization in OFDM systems using the cyclic prefix," Proc.
International Symposium on Synchronization, Essen, Germany,
December 14-15, 1995, pp.16-19.
[7] T.M. Schmidl and D.C. Cox, "Robust frequency and timing
synchronization for OFDM," IEEE Trans. Commun., vol.45, pp.1613-
1621, Dec, 1997.
[8] H. Minn, M. Zeng, and V.K. Bhargava, "On timing offset estimation for
OFDM system," IEEE Comm. Lett., vol.4, pp.242-244, July 2000.
[9] J. Lee, H. Lou, D. Toumpakaris, and J. M. Cioffi, "A blind frequency
tracking algorithm for OFDM transmission over frequency selective
channels," in Proc. IEEE Veh. Technol. Conf. 2004-Fall, 2004.
[10] M. Morelli, A. N. D-Andrea, and U. Mengali, "Frequency ambiguity
resolution in OFDM systems," IEEE Commun. Lett., vol. 4, pp. 134-
136, Apr. 2000.
[11] T. Pollet, P. Spruyt, and M. Moeneclaey, "The BER performance of
OFDM systems using nonsynchronized sampling," in Proc. Global
Telecommunications Conf., San Francisco, CA, Nov. 1994, pp. 253-
257.
[12] Alan V. Oppenheim and Ronald W. Schafer, Discrete-Time Signal
Processing, Prentice Hall, 1999.
[13] J. V. D. Beek, M. Sandell, and P. 0. Borjesson, "ML estimation of time
and frequency offset in OFDM systems", IEEE Transactions on Signal
Processing, Vol. 45, No. 7, July 1997, pp. 1800-1805.
[14] M. Makundi, A. Hjorungnes, T. I. Loakso, "An Interpolation-Based
Frequency-Synchronization Scheme for OFDM Systems," IEEE 6th
Workshop on Signal Processing Advances in Wireless
Communications, 2005.
[15] IEEE 802.11a, Part 11: wireless LAN Medium Access Control (MAC)
and Physical Layer (PHY) specifications: High-speed physical layer in
the 5 GHz band, Supplement to IEEE standard for information
technology telecommunications and information exchange between
systems - local and metropolitan area networks - specific requirements,
1999.
[16] J. Medbo and P. Schramm, "Channel models for HiperLAN/2 in
different indoor scenarios," ETSI BRAN, Technical Report 3ERI085B,
1998.
[17] K. Shi, and E. Serpedin, "A Robust Metric for Coarse Frame and
Carrier Synchronization of OFDM Systems", in Proc. of The 36th
Asilomar Conference on Signals, System and Computers, Vol. 2, 3-6
Nov. 2002, pp. 1827-1831.
@article{"International Journal of Electrical, Electronic and Communication Sciences:50086", author = "Mahdi Masoumi and Mehrdad Ardebilipoor and Seyed Aidin Bassam", title = "A Novel FFT-Based Frequency Offset Estimator for OFDM Systems", abstract = "This paper proposes a novel frequency offset (FO) estimator for orthogonal frequency division multiplexing. Simplicity is most significant feature of this algorithm and can be repeated to achieve acceptable accuracy. Also fractional and integer part of FO is estimated jointly with use of the same algorithm. To do so, instead of using conventional algorithms that usually use correlation function, we use DFT of received signal. Therefore, complexity will be reduced and we can do synchronization procedure by the same hardware that is used to demodulate OFDM symbol. Finally, computer simulation shows that the accuracy of this method is better than other conventional methods.
", keywords = "DFT, Estimator, Frequency Offset, IEEE802.11a,OFDM.", volume = "1", number = "12", pages = "1715-4", }
