A New IFO Estimation Scheme for Orthogonal Frequency Division Multiplexing Systems

Authors: Keunhong Chae, Seokho Yoon

Abstract:

We address a new integer frequency offset (IFO) estimation scheme with an aid of a pilot for orthogonal frequency division multiplexing systems. After correlating each continual pilot with a predetermined scattered pilot, the correlation value is again correlated to alleviate the influence of the timing offset. From numerical results, it is demonstrated that the influence of the timing offset on the IFO estimation is significantly decreased.

Keywords: Estimation, integer frequency offset, OFDM, timing offset.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1100787

References:

[1] A. Filippi and S. Serbetli, “OFDM symbol synchronization using frequency domain pilots in time domain,” IEEE Trans. Wireless Commun., vol. 8, no. 6, pp. 3240-3248, June 2009.
[2] M. M. Wang, L. Xiao, T. Brown, and M. Dong, “Optimal symbol timing for OFDM wireless communications,” IEEE Trans. Wireless Commun., vol. 8, no. 10, pp. 5328-5337, Oct. 2009.
[3] M. Morelli and M. Moretti, “Integer frequency offset recovery in OFDM transmissions over selective channels,” IEEE Trans. Wireless Commun., vol. 7, no. 12, pp. 5220-5226, Dec. 2008.
[4] P. Dharmawansa, N. Rajatheva, and H. Minn, “An exact error probability analysis of OFDM systems with frequency offset,” IEEE Trans. Commun., vol. 57, no. 1, pp. 26-31, Jan. 2009.
[5] E.-S. Shim, S.-T. Kim, H.-K. Song, and Y.-H. You, “OFDM carrier frequency offset estimation methods with improved performance,” IEEE Trans. Broadcast., vol. 53, no. 2, pp. 567-573, June 2007.
[6] P. Liu, B.-B. Li, Z.-Y. Lu, and F.-K. Gong, “A new frequency synchronization scheme for OFDM,” IEEE Trans. Consumer Electron., vol. 50, no. 3, pp. 823-828, Aug. 2004.
[7] K.-T. Lee and J.-S. Seo, “Pilot-aided frequency offset estimation for digital video broadcasting systems,” IEICE Trans. Commun., vol. E90-B, no. 11, pp. 3327-3329, Nov. 2007.
[8] M. Speth, S. Fechtel, G. Fock, and H. Meyr, “Optimum receiver design for OFDM-based broadband transmission - part II: a case study,” IEEE Trans. Commun., vol. 49, no. 4, pp. 571-578, Apr. 2001.
[9] ETSI EN 300 744, “Digital video broadcasting (DVB); framing structure, channel coding and modulation for digital terrestrial television,” ETSI, Tech. Rep., Jan. 2001.