Proceedings ArticleDOI
Analysis and design of periodically time varying digital filters
J. Critchley
- Vol. 12, pp 2418-2421
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TLDR
This paper describes a type of periodically time varying (PTV) digital filter that simulates the response of a bank of M bandpass filters with their outputs connected to a rotating switch, and requires less multiplications per output sample.Abstract:
This paper describes a type of periodically time varying (PTV) digital filter. Such a filter of period M, simulates the response of a bank of M bandpass filters with their outputs connected to a rotating switch, and requires less multiplications per output sample. A theoretical analysis of the filters is presented, followed by a description of a method of design. A design of a 12-channel filter for use in transmultiplexing is considered.read more
Citations
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Journal ArticleDOI
Analysis and design of periodically time-varying IIR filters, with applications to transmultiplexing
J.S. Prater,C.M. Loeffler +1 more
TL;DR: Fundamental constraints on the form of infinite impulse response (IIR) periodically time-varying (PTV) filters are identified, and a design technique with well-defined error and stability characteristics based on those constraints is presented.
Journal ArticleDOI
A design method for a periodically time-varying digital filter for spectrum scrambling
R. Ishii,M. Kakishita +1 more
TL;DR: It is proposed that a periodically time-varying digital filter can be designed using a bifrequency map and a conventional filter design method and implemented easily on a digital signal processor.
Journal ArticleDOI
A unified approach to scrambling filter design
Chwan-Wen King,Ching-An Lin +1 more
TL;DR: This paper derives necessary and sufficient conditions for a scrambling system to be insensitive to frame synchronization error, and proposes a procedure for the design of scrambling filters that are insensitive to synchronization error and have zero bandwidth expansion.
Patent
Filterbank zum Frequenzmultiplexen bzw. Frequenzdemultiplexen von Kanalsignalen
TL;DR: In this article, the erforderliche Rechenleistung zu vermindern is found, wobei die Anzahl der abzuspeichernden Koeffizienten sich nur unwesentlich erhoht.
Proceedings ArticleDOI
Bandwidth compression with periodically time-varying FIR filters
R. Leonard,C. Loeffler +1 more
TL;DR: A bandwidth compression(expansion) system has been developed for transmission of wide band signals over narrow band channels based on a linear periodically time-varying PTV) FIR structure.
References
More filters
Journal ArticleDOI
A Class of Time-Varying Digital Filters
B. Liu,P. Franaszek +1 more
TL;DR: It is shown that this class is the most general class of time-varying filters that preserve the wide-sense stationarity of the inputs and that such properties can facilitate considerably the analysis of systems incorporating these filters.