Blind Carrier Frequency Offset Estimation Based on Polynomial Rooting for Interleaved Uplink OFDMA

Ann-Chen CHANG  Chih-Chang SHEN  

Publication
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E96-A   No.10   pp.2057-2060
Publication Date: 2013/10/01
Online ISSN: 1745-1337
DOI: 10.1587/transfun.E96.A.2057
Print ISSN: 0916-8508
Type of Manuscript: LETTER
Category: Communication Theory and Signals
Keyword: 
carrier frequency offset,  interleaved OFDMA,  MVDR,  polynomial rooting,  

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Summary: 
This letter deals with blind carrier frequency offset estimation by exploiting the minimum variance distortionless response (MVDR) criterion for interleaved uplink orthogonal frequency division multiple access (OFDMA). It has been shown that the complexity and estimation accuracy of MVDR strictly depend on the grid size used during the search. For the purpose of efficient estimation, we present an improved polynomial rooting estimator that is robust in low signal-to-noise ratio scenario. Simulation results are provided for illustrating the effectiveness of the proposed estimator.