Estimation aveugle du résidu de porteuse dans les systèmes utilisant des codes LDPC

Content Provider	Semantic Scholar
Author	Imad, Rodrigue Houcke, Sébastien Ghogho, Mounir
Copyright Year	2009
Abstract	We consider in this paper the problem of carrier frequency of fset estimation of Low-Density Parity-Check (LDPC) coded s ystems. We propose a new technique of blind frequency offset estimat ion based on the calculation and minimization of a function o f the Log-Likelihood Ratios (LLR) of the syndrome elements obtained according to the parity check matrix of the code. This function has a globa l minimum at a frequency offset estimation error equal to zero and many loc al minima elsewhere. Therefore, the minimization procedur is done by applying the iterative Simulated Annealing algorithm. Simulation r esults show that the proposed technique clearly outperform s a classical blind frequency offset estimation method.
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Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article