Modified linear phase frequency response masking FIR filter

This paper proposes a modified frequency response masking (FRM) technique for the synthesis of linear phase, sharp transition, low arithmetic complexity FlR filter. The structure is composed of lowpass and bandpass subfilters which are designed as linear phase, equiripple passband and computationall...

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Bibliographic Details
Published inISPA 2005. Proceedings of the 4th International Symposium on Image and Signal Processing and Analysis, 2005 pp. 434 - 439
Main Authors Rodrigues, J.X., Pai, K.R.
Format Conference Proceeding
LanguageEnglish
Published IEEE 2005
Subjects
Arithmetic
Band pass filters
Bandwidth
Delay
Design methodology
Educational institutions
Finite impulse response filter
Frequency response
Passband
Transfer functions
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Summary:This paper proposes a modified frequency response masking (FRM) technique for the synthesis of linear phase, sharp transition, low arithmetic complexity FlR filter. The structure is composed of lowpass and bandpass subfilters which are designed as linear phase, equiripple passband and computationally efficient FIR filters. The frequency response of the subfilters are modeled using trigonometric functions of frequency and the design yields closed form expressions for the impulse response coefficients of the subfilters. The slopes at the edges of the transition region of the subfilter are matched which makes the frequency response a continuous function of frequency and hence reduces the effects due to Gibb's phenomenon thereby reducing passband edge ripple of the subfilters. The bandpass filter eliminates one masking filter and a model filter from the basic FRM approach thereby simplifying the synthesis of the proposed modified FRM FIR filter.
ISBN:953184089X
9789531840897
ISSN:1845-5921
DOI:10.1109/ISPA.2005.195451