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Effective date : Methods for digital FIR signal processing and methods for digital IIR signal processing are already described in the literature. FIR filters have a number of important advantages: 1 They are stable; 2 do not branch parasitic non-linear natural oscillations limit cycles, hysteresis effects ; 3 Filter noise performance is usually much less than in the IIR filters. A disadvantage of the FIR filters is that they require much larger numbers of operations than IIR filters for the identical requirements to the amplitude frequency characteristic.
Purpose of the invention is the reduction of the mentioned disadvantage in the maintenance of the mentioned advantages. The Invention belongs to the basic electronic circuits, and in particular the networks with digital techniques.
In the literature eg, Signal Processors, Dr. Doblinger, , p. FIR filter have a number of important benefits: 1 they are always stable; 2 show no parasitic nonlinear Natural oscillations limit cycles, hysteresis effects ; 3 Filter noise performance is usually much less than in the IIR filters. One Disadvantage of the FIR filters is that with the identical Demands to the amplitude frequency characteristic, they much the greater number of operations as IIR filters.
The Invention will be explained with reference to the single figure. The transfer function of a digital system is a rational function for the general case IIR. The factor corresponds to the simple real pole. We will limit the number of summands to expressions 2 , 3.
In order to neglect the error of stunting, we will choose the sufficiently large number the tens, hundreds of the summands. Let the number of summands be , then:. In fairness of equation 4 one can convince oneself by multiplying the factors in the right part.
What is the equation 4 interesting for? The realization of the left part of equation 4 requires the execution of operations of multiplication and operations of pair addition 1a. The realization of the right part of equation 4 requires the execution of 7 operations of multiplication and 7 operations of pair addition 1b. By analogy with equation 4 we will record:.
There is also another form of recording the rational function in the case of simple poles:. It is necessary to choose that circuit which demands the smaller number of operations. Method of digital signal processing based on the realization in cascade form or parallel form with sufficient accuracy the transfer function.
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Entstörung von Sprachsignalen
Conversion of phonological representations into acoustical parameters for a concept-to-speech. Linear signal spaces are of great importance in signal and system theory as well as for modern. This thesis proposes a time-frequency TF analysis of linear signal. Linear signal. This new viewpoint is based mathematically on the introduction of the Wigner.
Signalprozessoren: Architekturen, Algorithmen, Anwendungen (Livre en allemand)
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Signalprozessoren von Gerhard Doblinger (2004, Kunststoffeinband)
ISBN 13: 9783935340434