Title :
Design of lattice wave digital filter banks
Author_Institution :
German Nat. Res. Center for Inf. Technol., St. Augustin, Germany
Abstract :
A lattice wave digital filter (LWDF) is a two-port modeled after a classic lattice filter. LWDFs derived from lossless lattice filters are inherently branching filters. Applying a simple transform to the transfer functions of a pair of proper prototype filters leads to a complete filter bank design. An example for such a design using LWDFs, an octave filter bank, is given. The magnitude of the sum of all transfer functions can be forced to be one. Unfortunately, the transformation increases the number of delays very fast. In this paper, it is shown how to reduce the number of delays with an analytic method.
Keywords :
channel bank filters; delays; lattice filters; network synthesis; transfer functions; two-port networks; wave digital filters; branching filters; delay reduction; filter bank design; lattice wave digital filter banks; lossless lattice filters; octave filter bank; prototype filters; transfer functions; transform; two-port network; Bandwidth; Delay; Digital filters; Filter bank; Frequency; IIR filters; Lattices; Passband; Prototypes; Transfer functions;
Conference_Titel :
Signals, Systems & Computers, 1998. Conference Record of the Thirty-Second Asilomar Conference on
Conference_Location :
Pacific Grove, CA, USA
Print_ISBN :
0-7803-5148-7
DOI :
10.1109/ACSSC.1998.751552
