Group delay transfer functions with least squares error
作者:
G.Wilson,
M.Papamichael,
期刊:
Radio and Electronic Engineer
(IET Available online 1983)
卷期:
Volume 53,
issue 5
页码: 199-208
年代: 1983
DOI:10.1049/ree.1983.0039
出版商: IERE
数据来源: IET
摘要:
This paper presents tables of group-delay functions, ranging in order from 3 to 11, which approximate a nominal one second delay over bandwidths up to 17.5 rad/s. The functions, which can be arranged in all-pole or non-minimum phase forms, are based on a least-squares minimization of the delay error and therefore exhibit ‘unequal ripple’ characteristics. These and other features of the leastmean-square approximations are discussed and comparisons drawn with maximally-flat and equi-ripple forms.A versatile RC-active biquadratic section, which has been found particularly useful in implementing non-minimum phase functions, is also described.
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