Improving OFDM Carrier Frequency Synchronization Using Cyclic Prefix

Abstract:

Orthogonal Frequency Division Multiplexing (OFDM) is the key technology of high speed communication systems which are widely used today. Small carrier frequency offset can make OFDM system performance fell sharply. So it needs very effective carrier frequency synchronization to make sure that the system works perfect. Seen from a large number of simulations, typical algorithm requires strict symbol timing. According to this characteristic, we proposed an improved carrier frequency synchronization algorithm using cyclic prefix. The improved algorithm can achieve better performance than typical algorithm in multipath fading channel. The precision of the improved algorithm under the same Signal Noise Ratio (SNR) is about 3 orders of magnitude higher than typical algorithm. We found that improved algorithm has more excellent performance in burst packet transmission mode.

• Periodical: Applied Mechanics and Materials (Volumes 411-414)
• Pages: 779-783
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.411-414.779
• Online since: September 2013
• Authors: Ju Peng Zhang, Ming Jiang Wang
• Keywords: Carrier Frequency Synchronization, Fraction Frequency Offset, Integer Frequency Offset, Orthogonal Frequency Division Multiplexing (OFDM)

References

[1] Ferdinand Classen, Heinrich Meyr: Frequency synchronization algorithms for OFDM systems suitable for communication over frequency selective fading channels. In: IEEE Vehic. Tech. Conference, Stockholm, Sweden, June (1994).

DOI: 10.1109/vetec.1994.345377

[2] Fredrik Tufvesson, Ove Edfors, Mike Faulkner: Time and frequency synchronization for OFDM using PN-sequence preambles. In: IEEE Vehicular Conference, Amsterdam, the Netherlands, September (1999).

DOI: 10.1109/vetecf.1999.797329

[3] Marco Luise, Ruggero Reggiannini: Carrier frequency recovery in All-digital modems for burst-mode transmissions. IEEE Trans on Communications, Vol. 43 (1995), pp.1169-1180.

DOI: 10.1109/26.380149

[4] Timothy M. Sandell: Robust frequency and timing synchronization for OFDM. IEEE Trans. on COM., Vol. 45 (1997), pp.1613-1621.

[5] Van de Jan-Jaap van de Beek: ML estimation of time and frequency offset in OFDM systems. IEEE Trans. on Signal, Vol. 45 (1997), pp.1800-1805.

DOI: 10.1109/78.599949

[6] Timothy M. Sandell, Van de Jan-Jaap van de Beek: Timing and frequency synchronization in OFDM systems using the cyclic prefix. In: Int. Symposium Synchronization, Essen, Germany, (1995).

[7] Morelli M, Andrea A, Mengali U: Feedback frequency synchronization for OFDM applications. IEEE Let. Communication, April (1998).

[8] Tureli U, Liu H: Blind carrier offset estimation algorithms for DFT-based OFDM systems. IEEE Let. Communication, April (1998).

[9] Il Muk Choi, Kyung Hoon Won, Hyung-Jin Choi: An enhanced fine timing synchronization method for diagonal pilot OFDM system. IEEE ICTC, 2011, pp.1-5.

DOI: 10.1109/ictc.2011.6082539

[10] Vineet Srivastava, Chin Keong Ho: Robust MMSE channel estimation in OFDM systems with practical timing synchronization. IEEE Conf. WCNC, Vol. 2 (2004), pp.711-716.

DOI: 10.1109/wcnc.2004.1311273