An improved coarse synchronization scheme in 3GPP LTE downlink OFDM systems

In this paper, an improved algorithm of coarse synchronization in the downlink of 3GPP LTE system is presented. This new algorithm can reduce the MSE (mean square error) of detected fractional carrier frequency offset (FCFO) by an order of magnitude and improve the accuracy rate of start point estimation by near 80 percent when SNR equals 0 in contrast with conventional coarse synchronization algorithms, such as ML, MMSE, S&C and MC. The simulation result for the proposed algorithm is presented in comparison with the conventional algorithms.

[1]  Mahrokh G. Shayesteh,et al.  Robust Timing and Frequency Synchronization for OFDM Systems , 2011, IEEE Transactions on Vehicular Technology.

[2]  Markus Rupp,et al.  Carrier frequency synchronization in the downlink of 3GPP LTE , 2010, 21st Annual IEEE International Symposium on Personal, Indoor and Mobile Radio Communications.

[3]  Wen Xu,et al.  Robust Synchronization for 3GPP LTE System , 2010, 2010 IEEE Global Telecommunications Conference GLOBECOM 2010.

[4]  Volker Jungnickel,et al.  A Closed Concept for Synchronization and Cell Search in 3GPP LTE Systems , 2009, 2009 IEEE Wireless Communications and Networking Conference.

[5]  S.H. Muller-Weinfurtner.  On the optimality of metrics for coarse frame synchronization in OFDM: a comparison , 1998, Ninth IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (Cat. No.98TH8361).

[6]  Khaled Ben Letaief,et al.  A robust timing and frequency synchronization for OFDM systems , 2003, IEEE Trans. Wirel. Commun..

[7]  Pei-Yun Tsai,et al.  A new cell search scheme in 3GPP long term evolution downlink, OFDMA systems , 2009, 2009 International Conference on Wireless Communications & Signal Processing.