Information theoretic approach to synchronization: the OFDM carrier frequency offset example

Publication Type:

Conference Paper

Source:

Sixth Advanced International Conference on Telecommunications, Barcelona,Spain (2010)

Abstract:

In practical mobile communication systems, dataaided synchronization is performed before actual data exchanges, and synchronization methods are tailored to the pilot sequence. In this paper, we propose a framework for initial synchronization that works independently of the pilot sequence. We show that classical data-aided and blind techniques are particular cases of this general framework. We thoroughly study the specific problem of OFDM data-aided carrier frequency offset estimation. For the latter, we provide theoretical expressions of performance upper-bounds. Also, a practical thin CFO estimator for OFDM is provided under the form of a novel algorithm which is shown by simulations to perform better than classical pilot based methods.

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