Digital filter structures for canonic signed-digit code implementation by microprocessor
作者:
P.M.Hughes,
B.M.G.Cheetham,
期刊:
IEE Proceedings E (Computers and Digital Techniques)
(IET Available online 1983)
卷期:
Volume 130,
issue 2
页码: 37-41
年代: 1983
DOI:10.1049/ip-e.1983.0008
出版商: IEE
数据来源: IET
摘要:
The effect of structure on microprocessor-based recursive digital filters which employ a predetermined multiplication technique based on the canonic signed-digit code is considered. It is shown that, by including structure as a parameter in the design of such filters, transfer-function coefficient quantisation error may be reduced. A set of design rules for choosing the best structure to implement a 2nd-order transfer function, which has pairs of zeros located at + 1 or − 1 in the complexz-plane, is developed. These rules are applied to an 8th-order Chebyshev type bandpass filter, realised as a cascade of four 2nd-order sections by a microprocessor designed specifically for signal processing.
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