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Design of Lowpass Narrowband FIR Filters Using IFIR and Modified RRS Filters
Abstract
This paper presents a new efficient method for the design of narrowband lowpass (LP) finite impulse response (FIR) filters using a modified interpolated finite impulse response (IFIR) filter and an improved recursive running sum (RRS) filter. Since the number of parameters of the RRS filter is increased the adjustment of the frequency characteristic of the interpolator filter using fewer stages of the RRS filter is possible.
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