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This paper presents an approach for digital lattice filter roundoff noise reduction using error spectrum shaping (ESS). ESS roundoff noise expression for the one-, two-, three-, and four-multiplier lattice structures are derived. A numerical example for demonstrating the performance of the proposed ESS noise reduction in lattice filters is also presented.
In this paper, a novel lattice network-based structure is derived for a canonic realization of recursive digital filters. For an Nth order filter, unlike the existing lattice structures the proposed structure has 2N free parameters that can be used to improve the structure properties. The relationship between the transfer function coefficients of the filters and the parameters of the proposed structure...
The excellent finite wordlength property of the lattice digital filter is well known. The four-multiplier normalized lattice, with signal power at all delay elements normalized to unity, has particular advantage in its overflow property. However, when used to implement an Nth order digital filter, the normalized lattice implementation requires 5N +1 multipliers. In this paper, we present a novel lattice...
In this paper, based on a new parametrization of the input-balanced realizations a novel structure is proposed for implementation of 2nd order digital filters. Like the normalized lattice structure, it contains a Givens rotation. The expression of roundoff noise gain for this structure is derived. This proposed structure is simpler than the normalized structure. Though having the same number of structure...
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