Abstract

DIAZ-CARMONA, Javier; JOVANOVIC-DOLECEK, Gordana  and  PADILLA-MEDINA, José A.. An Algorithm for Computing Design Parameters of IFIR Filters with Low Complexity. Comp. y Sist. [online]. 2006, vol.10, n.2, pp.99-106. ISSN 2007-9737.

This paper describes an algorithm for computing design parameters of Interpolated FIR (IFIR) digital filters with a low complexity (small number of products per output sample). The interpolation function is performed by a sharpened cascaded Recursive-Running Sum (RRS) filter, where the sharpening technique is used to improve the RRS frequency domain characteristics. Given the desired filter specifications and a chosen sharpening polynomial, the proposed algorithm computes the maximum IFIR filter interpolation factor and the minimum number of stages of the RRS filter in such a way that the overall structure meets the desired specifications with the minimum complexity

Keywords : Narrowband filtering; Digital filters; IFIR; Sharpening technique; RRS filter.