A Novel Data-Aided Feedforward Timing Estimator for Burst-Mode Satellite Communications

Kang WU  Tianheng XU  Yijun CHEN  Zhengmin ZHANG  Xuwen LIANG  

Publication
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E99-A   No.10   pp.1895-1899
Publication Date: 2016/10/01
Online ISSN: 1745-1337
DOI: 10.1587/transfun.E99.A.1895
Type of Manuscript: LETTER
Category: Communication Theory and Signals
Keyword: 
symbol timing estimator,  feedforward,  data-aided,  low SNR,  low complexity,  

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Summary: 
In this letter, we investigate the problem of feedforward timing estimation for burst-mode satellite communications. By analyzing the correlation property of frame header (FH) acquisition in the presence of sampling offset, a novel data-aided feedforward timing estimator that utilizes the correlation peaks for interpolating the fractional timing offset is proposed. Numerical results show that even under low signal-to-noise ratio (SNR) and small rolloff factor conditions, the proposed estimator can approach the modified Cramer-Rao bound (MCRB) closely. Furthermore, this estimator only requires two samples per symbol and can be implemented with low complexity with respect to conventional data-aided estimators.