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CRB derivation and new Code-Aided timing recovery technique for QAM modulated signals

In this paper, we propose a maximum likelihood based Code-Aided (CA) timing recovery algorithm for square-QAM modulated signals. We also theoretically derive the analytical expression of the CA Crammaximum likelihood based Code-Aided (CA) timing recovery algorithmer-Rao Bound for time delay estimation. Our simulations show that the proposed CA approach realizes a performance equivalent to the Data-Aided (DA) approach over a large interval of signal to noise ratio (SNR) values.