Initial synchronization for multi-cell OFDMA systems

Authors:
Yen-Cheng Liu;Kuhn-Chang Lin;Yu T. Su
Affiliations:
Department of Communications Engineering, National Chiao Tung University, Hsinchu, Taiwan;Department of Communications Engineering, National Chiao Tung University, Hsinchu, Taiwan;Department of Communications Engineering, National Chiao Tung University, Hsinchu, Taiwan
Venue:
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
Year:
2009

Citing 3
Cited 0

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Abstract

In this paper, a complete solution to the initial synchronization for multi-cell OFDMA (orthogonal frequency division multiple access) systems is proposed. The proposed method consists of the following operations: timing synchronization, fractional carrier frequency offset (CFO) estimation, fractional CFO compensation, and joint integer CFO and preamble index estimation. To estimate multiple fractional CFOs with pseudoperiodic preamble, we suggest an over-sampling approach. An ill-condition detection and noise suppression algorithm is also presented. For joint integer CFO and preamble index estimation, we use a differential detection based cross-correlation method. Simulation results have shown that the proposed method gives satisfactory performance for a wide SNR range even when the mobile station (MS) is on the cell boundaries.