Abstract
Coefficient sensitivity and roundoff error with floatingpoint rounding have been investigated for several digital ladder filter structures. It is found that in all the cases studied, the ladder structures first proposed by Fettweis show a much lower coefficient sensitivity. In this paper, a hybrid cascade structure is proposed and synthesized. Its coefficient sensitivity is found to be between a conventional cascade structure and the ladder structures. Roundoff error is also investigated by extensive simulation. The new Fettweis ladder structure is found to exhibit the lowest roundoff error. This result is in agreement with the theoretical study which indicates that digital filters which exhibit reduced attenuation sensitivity tend to have less roundoff error.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
