Carrier frequency offset estimation for PUCCH in high speed train environment

An iterative carrier frequency offset (CFO) estimation method is proposed for the physical uplink control channel (PUCCH) of 3GPP-LTE in high speed train environment. In the algorithm, the signal of one user in the received multi-user signals is separated by despreading, and the despreaded pilot signals of the user are employed in the cross-correlation operation to estimate the coarse CFO in frequency domain. The data signals compensated by the estimated coarse CFO, are employed to estimate the fine CFO by the cross-correlation operation. Simulation results show that the proposed scheme has high accuracy in low SNR and low complexity, and improve the performance of the system greatly.

[1]  Sayfe Kiaei,et al.  Class of cyclic-based estimators for frequency-offset estimation of OFDM systems , 2000, IEEE Trans. Commun..

[2]  Erchin Serpedin,et al.  Decision-directed fine synchronization in OFDM systems , 2005, IEEE Transactions on Communications.

[3]  Yih-Fang Huang,et al.  Pilot assisted synchronization for wireless OFDM systems over fast time varying fading channels , 1998, VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151).

[4]  Gregory J. Pottie,et al.  A comparison of frequency offset tracking algorithms for OFDM , 2003, GLOBECOM '03. IEEE Global Telecommunications Conference (IEEE Cat. No.03CH37489).