Efficient implementation of real filter banks using frequency response masking techniques

Author

Lee, J.W. ; Lim, Y.C.

Author_Institution

Dept. of Electr. Eng., Nat. Univ. of Singapore, Singapore

Volume

1

fYear

2002

fDate

2002

Firstpage

69

Abstract

The fast filter bank (FFB) is a single-rate filter bank based on the frequency response masking technique and has very sparse filter coefficients. As a result, it has very low computational complexity. However, the output of the filter bank is complex. In this paper, a method is proposed to reduce the FFB, if the input and output signals are real. This involves complex modulation at selected nodes throughout the filter bank. The overall savings achieved are substantial.

Keywords

computational complexity; digital filters; fast Fourier transforms; filtering theory; frequency response; modulation; FFB reduction; complex filter bank output; complex modulation; computational complexity; fast filter bank; filter bank nodes; frequency response masking techniques; real filter bank implementation; real input signals; real output signals; single-rate filter bank; sliding FFT operation; sparse filter coefficients; Attenuation; Bandwidth; Channel bank filters; Computational complexity; Filter bank; Finite impulse response filter; Frequency response; Prototypes; Signal analysis; Transfer functions;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2002. APCCAS '02. 2002 Asia-Pacific Conference on

Print_ISBN

0-7803-7690-0

Type

conf

DOI

10.1109/APCCAS.2002.1114910

Filename

1114910