A. S. Alexandrov, A. V. Shabanov, Yaroslavl State University, Yaroslavl, Russia
SYNCHROINFO JOURNAL. Volume 5, Number 1 (2019). P. 13-16.
The report is devoted to the carrier frequency recovery problem in OFDM (Orthogonal Frequency Division Multiplexing) systems. The imitation model of frequency tracking system utilizing maximum likelihood optimal frequency detector is proposed. The dependence of frequency error variance on various signal parameters and the loop gain considered. The disturbance interference model includes additive white gaussian noise and band-limited noise, represented by reflected signal.
Keywords: OFDM, carrier recovery, synchronization circuit, maximum likelihood criteria, frequency detector.
 John A. C. Bingham. Multicarrier modulation for data transmission: An idea whose time has come. IEEE Communications Magazine, May 1990. J-J. van de Beek.
 M. Sandell, P. O. Börjesson, “ML Estimation of Time and Frequency Offset in OFDM systems,” IEEE Transactions on Signal Processing, Vol. 45, No. 7, July 1997.
 J. Heiskala, J. Terry. OFDM wireless LANs – a theoretical and practical guide, SAMS, 2001.
 Zhodzishskiy M.I. Digital phase locked loops. M., Soviet radio, 1980.