Frequency Offset Estimator for OFDM Using a Special Preamble

Yun WU  Hanwen LUO  Ming DING  Renmao LIU  Haibin ZHANG  

IEICE TRANSACTIONS on Communications   Vol.E90-B   No.2   pp.388-391
Publication Date: 2007/02/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e90-b.2.388
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
OFDM,  frequency offset,  estimation,  novel preamble,  identical parts,  

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In this letter,we design a special preamble composed of two OFDM training blocks with different numbers of identical parts. Based on the designed preamble, we propose a method to estimate frequency offset utilizing initial estimates from the two OFDM training symbols. By elaborately selecting the numbers of identical parts for the two training blocks, the proposed estimator provides a much larger estimate range than conventional estimators using identical parts. Computer simulations show that the proposed estimator exhibits superior estimate performance, while maintaining low computational complexity.