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Volume 27 Issue 11
Nov.  2005
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Zheng Lai-bo, Hu Jian-dong. A Decision-Directed OFDM Carrier Frequency Synchronization Loop[J]. Journal of Electronics & Information Technology, 2005, 27(11): 1710-1713.
Citation: Zheng Lai-bo, Hu Jian-dong. A Decision-Directed OFDM Carrier Frequency Synchronization Loop[J]. Journal of Electronics & Information Technology, 2005, 27(11): 1710-1713.

A Decision-Directed OFDM Carrier Frequency Synchronization Loop

  • Received Date: 2004-05-31
  • Rev Recd Date: 2004-10-15
  • Publish Date: 2005-11-19
  • Further investigation is given to a kind of carrier frequency offset (CFO) blind estimation algorithm based on time domain received signal reconstruction in OFDM systems, and the four aspects that affect the estimation accuracy are analyzed. For minimizing the residual carrier frequency offset, a kind of decision-directed carrier frequency synchronization loop is given by introducing a feedback factor into the frequency compensation. Better carrier frequency tracking performance can be gotten by adjusting the loop gain. The residual frequency offset can be restricted within 1% of the carrier spacing even if lager frequency drift exists, if bit SNR reaches 9dB.
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  • Hanzo L, Munster M, Choi B J, et al.. OFDM and MC-CDMA for broadband multi-user communications, WLANs and broadcasting. West Sussex, England, IEEE Press, 2003: 117-124.[2]Sari H, Karam G, Jeanclaude I. Transmission techniques for digital terrestrial TV broadcasting. IEEE Comm. Magazine, 1995, 33(2): 100-109.[3]Kalet I. The multitone channel[J].IEEE Trans. Comm.1989, 37(2):119-124[4]Van Nee R. New high-rate wireless LAN standards. IEEE Comm. Magazine, 1999, 37(12): 82-88.[5]Van Nee R, Prasad R. OFDM Wireless Multi-media Communications. Boston, London: Artech House, 2000: 73-93.[6]Van de Beek J J, Sandell M, Borjesson P O. ML estimation of time and frequency offset in OFDM systems[J].IEEE Trans. on Signal Processing.1997, 45(7):1800-1805[7]Daffara F, Adami O. A novel carrier recover technique for orthogonal multicarrier system[J].European Trans., Telecommun.1996, 7(4):323-334[8]Du Y.[J].Zhang X M, Zhu P C. A signal reconstruction CFO blind tracking algorithm for OFDM system in multipath channels. Proc. PIMRC04, Beijing.2003,:-
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