An Improved Large Frequency Offset Estimator Using Interpolation of Expanded Periodogram

Seunghyun NAM  Jong-Min PARK  Heewook KIM  Tae Chul HONG  Kunseok KANG  Bon Jun KU  Do Seob AHN  

IEICE TRANSACTIONS on Communications   Vol.E95-B   No.9   pp.3007-3010
Publication Date: 2012/09/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E95.B.3007
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
large frequency offset,  estimation,  periodogram,  long term evolution,  

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The periodogram scheme is a versatile method for large frequency offset estimation which requires preambles, in general, and only a few reference signals. However, the drawback of the conventional scheme is its inaccuracy in detecting the integer part of frequency offset which dominates the accuracy of frequency offset estimation. In order to increase the accuracy of the estimation, we directly interpolate a coefficient of the periodogram. The conventional periodogram and proposed schemes are compared in terms of the mean square error performance in the long term evolution system. The performance of the proposed method is compared with the conventional one and the simulation results indicate the better performance of the proposed one.