Recursive implementation of LTV filters—Frozen-time transfer function versus generalized transfer function

1 July 1984

journal article
Published by Institute of Electrical and Electronics Engineers (IEEE) in Proceedings of the IEEE

Vol. 72 (7) , 980-982
https://doi.org/10.1109/PROC.1984.12953

Abstract

Certain researchers synthesize linear time-variant (LTV) filters by assuming a frozen-time relationship between the transfer function and the difference equation. In this letter, the misconception in this synthesis scheme is examined and the comparison between the frozen-time transfer function and the generalized transfer function is also illustrated.

Keywords

TRANSFER FUNCTIONS
DIFFERENCE EQUATIONS
DIGITAL FILTERS
NONLINEAR FILTERS
BAND PASS FILTERS
CUTOFF FREQUENCY
PROTOTYPES
INTERPOLATION
SIGNAL ANALYSIS
IMAGE SAMPLING

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