Multirate digital filters, filter banks, polyphase networks, and applications: a tutorial
Article Abstract:
The multirate processing of digital signals has seen considerable progress in the last several years, especially in the area of multirate digital filter bank designs. Multirate systems can be used in a number of areas, including communications, speech processing, image compression, radar systems, antenna systems, analog voice privacy systems, spectrum analysis, and the digital audio industry. Decimators and interpolators are used as the basic building blocks for a multirate digital signal processing systems. One problem with a multirate system is aliasing. Aliasing can be avoided by the careful choice of the shape of the basic reciprocal lattice cell. Although the multirate filter bank area is mature, some areas still need research. Two of these areas are the FIR two-channel perfect reconstruction system based on the Smith Barnwell approach and the all-pass breakup.
Publication Name: Proceedings of the IEEE
Subject: Electronics
ISSN: 0018-9219
Year: 1990
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The digital all-pass filter: a versatile signal processing building block
Article Abstract:
The digital all-pass filter is a n efficient, versatile signal processing element. Applications include: notch filtering; complementary filtering and filter banks; multirate filtering; spectrum and group delay equalization; and Hilbert transformations. Also, the state-space manifestations of many all-pass filter structures are free of limit cycle characteristics with very little round-off noise gain. The properties and structure of the digital all-pass filter are analyzed in depth as are the aforementioned applications. Extensive mathematical computation are included.
Publication Name: Proceedings of the IEEE
Subject: Electronics
ISSN: 0018-9219
Year: 1988
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Low Passband Sensitivity Digital Filters: A Generalized Viewpoint and Synthesis Procedures
Article Abstract:
A digital filter is implemented on a general-purpose computer or by using special purpose hardware. This filter behaves differently from its idealized design. A new theory for low- sensitivity discrete-time filter structures is described. Objectives of this theory are outlined. The implementation of the digital filters should be structurally passive. A circuit diagram shows normalized gray-market lattice structure.
Publication Name: Proceedings of the IEEE
Subject: Electronics
ISSN: 0018-9219
Year: 1984
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