Low complexity block-based unbiased frequency estimation

GUSTAVO GONZALEZ; FERNANDO GREGORIO; JUAN COUSSEAU

Rio de Janeiro

Conferencia; IEEE International Symposium on Circuits and Systems, ISCAS 2011; 2011

LPS - Universidad Federal de Rio de Janeiro

Abstract—The problem of efficient block-based frequency estimationis addressed in this paper. Different to a recently proposedsolution that uses a direct-form realization of the notch filter, thenovel estimator is based on the normalized lattice realization.One specific advantage of the proposed realization is that noadditional normalization is required, as a consequence, a lowcomplexity estimator is obtained. The mean squared convergenceis probed and an analytic expression for the Mean Squared Errorfor infinite data is given. Simulations show that the algorithmconverges in a few iterations. Comparisons with a previous blockbased estimator are also shown.