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Design and implementation of narrow-band linear-phase FIR filters with piecewise polynomial impulse response

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2 Author(s)
Saramaki, T. ; Signal Process. Lab., Tampere Univ. of Technol., Finland ; Mitra, S.K.

The transfer function of these filters is a parallel connection of several branches with transfer functions of the form Gl(zL)Fl(z), where the length of each F l(z) is L. It is shown that by properly selecting the Fl (z)'s the overall impulse response can be divided into several blocks of L samples in such a manner that in each block the impulse response is a polynomial of a given degree. The degree is one less than the number of branches, whereas the overall length of the impulse response is N=ML, where M is the length of the Gl(z)'s. Efficient implementation forms are proposed for the overall filter. Examples are included illustrating the efficiency of the proposed approach in implementing narrow-band linear-phase FIR filters

Published in:

Circuits and Systems, 1999. ISCAS '99. Proceedings of the 1999 IEEE International Symposium on  (Volume:3 )

Date of Conference:

Jul 1999