Abstract:
Wave digital filters (WDFs) are modeled after classical filters, preferably in lattice or ladder configurations or generalizations thereof. They have very good properties...Show MoreMetadata
Abstract:
Wave digital filters (WDFs) are modeled after classical filters, preferably in lattice or ladder configurations or generalizations thereof. They have very good properties concerning coefficient accuracy requirements, dynamic range, and especially all aspects of stability under finite-arithmetic conditions. A detailed review of WDF theory is given. For this several goals are set: to offer an introduction for those not familiar with the subject, to stress practical aspects in order to serve as a guide for those wanting to design or apply WDFs, and to give insight into the broad range of aspects of WDF theory and its many relationships with other areas, especially in the signal-processing field. Correspondingly, mathematical analyses are included only if necessary for gaining essential insight, while for all details of more special nature reference is made to existing literature.
Published in: Proceedings of the IEEE ( Volume: 74, Issue: 2, February 1986)
Citations are not available for this document.
Cites in Patents (7)Patent Links Provided by 1790 Analytics
1.
Nguyen, Dinh Quoc Thang; Basa, Andrei Daniel; Hammerschmidt, Dirk, "Testing using coupling emulation"
Inventors:
Nguyen, Dinh Quoc Thang; Basa, Andrei Daniel; Hammerschmidt, Dirk
Abstract:
An apparatus and method associated with testing are disclosed, where a coupling between a device under test and at least one further device may be emulated. The coupling may be a bus.
Assignee:
INFINEON TECHNOLOGIES AUSTRIA AG
Filing Date:
27 February 2014
Grant Date:
09 July 2019
Patent Classes:
Current International Class:
G06F0112600000, G06F0175000000
2.
Gazsi, Lajos, "DIGITAL PHASE LOCKED LOOP FOR SUB MU TECHNOLOGIES"
Inventors:
Gazsi, Lajos
Abstract:
A digital phase locked loop has a digitally controlled oscillator for generating an output frequency, a phase detector device for detecting the phase difference between a reference frequency and an output frequency of the oscillator. The phase detector device contains a delta-sigma frequency decision maker, and a digital loop filter, connected downstream of the phase detector device, for actuating the digitally controlled oscillator.
Assignee:
INFINEON TECHNOLOGIES AG
Filing Date:
09 August 2006
Grant Date:
11 August 2009
Patent Classes:
Current U.S. Class:
375327000, 375376000
Current International Class:
H03D0031800
3.
Yellin, Daniel, "WAVE DIGITAL FILTER WITH LOW POWER CONSUMPTION"
Inventors:
Yellin, Daniel
Abstract:
A wave digital filter which includes a plurality of memoryless adapters each having two or more ports, each port including an input and an output, and at least one controlled gate which delays the propagation of a value into at least one input of at least one of the adapters.
Assignee:
INTEL CORP
Filing Date:
24 February 2000
Grant Date:
08 November 2005
Patent Classes:
Current U.S. Class:
708317000
Current International Class:
G06F0171000000
4.
YELLIN, Daniel, "WAVE DIGITAL FILTER"
Inventors:
YELLIN, Daniel
Abstract:
A wave digital filter which includes a plurality of memoryless adapters (42) each having two or more ports, each port including an input and an output, and at least one controlled gate (44) which delays the propagation of a value into at least one input of at least one of the adapters.
Assignee:
DSPC TECHNOLOGIES LTD
Filing Date:
19 February 2001
Grant Date:
02 January 2003
Patent Classes:
Current International Class:
H03H0170200000
5.
YELLIN, Daniel, "WAVE DIGITAL FILTER"
Inventors:
YELLIN, Daniel
Abstract:
A wave digital filter which includes a plurality of memoryless adapters (42) each having two or more ports, each port including an input and an output, and at least one controlled gate (44) which delays the propagation of a value into at least one input of at least one of the adapters.
Assignee:
DSPC TECHNOLOGIES LTD,
INDIVIDUAL PATENTER,
Filing Date:
19 February 2001
Grant Date:
30 August 2001
Patent Classes:
Current International Class:
H03H0170200000
6.
Lucioni, Gonzalo, Dr.-Ing., "Method and apparatus for evaluating Multifrequency tone signals using an adaptive wave digital notch filter"
Inventors:
Lucioni, Gonzalo, Dr.-Ing.
Abstract:
Multiple frequency tone signal evaluation method for communication system The method involves receiving symbols (Z) as a signal (S) which contains a mixture of two audio frequencies, selected from two different groups (HG, LG) of frequencies. The signal is sampled with a predetermined sampling rate, and is supplied to a first decimation filter (DO), in which the signal is low-pass filtered (DFO), and its sampling rate is halved. The filtered signal is supplied to a second decimation filter (D1), which divides it under further halving of the sampling rate, through band pass filtering (DF1), into a high-pass filtered signal (S1) and a low-pass filtered signal (S2). The filtered signals are respectively supplied to a first and second adaptive digital notch filter (ANWDF1, ANWDF2), whose filter coefficients (kl, k2) are a measure for the frequencies of the signal, and to a first and second level detector (PD1, PD2), after further halving of the sampling rate, to determine the amplitude (al, a2) of the respective signal. The transmitted symbol is determined in a discriminator unit (Rw), from the determined amplitudes of the high-pass and the low-pass filtered signal, and the adaptive filter coefficients. The first and second decimation filters are preferably recursive bridged digital filters of seventh and third degree, respectively.
Assignee:
SIEMENS AKTIENGESELLSCHAFT
Filing Date:
17 August 1998
Grant Date:
24 March 1999
Patent Classes:
Current International Class:
H04L0273000000
7.
Lucioni, Gonzalo, "Method and apparatus for evaluating Multifrequency tone signals using an adaptive wave digital notch filter"
Inventors:
Lucioni, Gonzalo
Abstract:
Multiple frequency tone signal evaluation method for communication system The method involves representing each symbol (Z) to be transferred as a signal (S) which contains a mixture of two audio frequencies selected from two different groups (HG, LG) of audio frequencies. The signal is digitally sampled with a predetermined sampling rate, and is supplied to a first decimation filter (DO), in which the signal is low-pass filtered (DFO) and its sampling rate is reduced by a factor of two. The filtered signal is supplied to a second decimation filter (D1), which divides it under further reduction of the sampling rate by a factor of two, through band pass filtering (DF1), into a high-pass filtered signal (S1) and a low-pass filtered signal (S2). The high-pass filtered signal is supplied to a first adaptive digital notch filter (ANWDF1), whose filter coefficient (kl) is a measure for the frequency of the signal, and to a first level detector (PD1), after further reduction of the sampling rate by a factor of two. This determines the amplitude (al) of the high-pass filtered signal. The low-pass filtered signal is also supplied to a second adaptive digital notch filter (ANWDF2) and a second level detector (PD2) which determines the amplitude (a2) of the low-pass filtered signal. The transmitted symbol is determined in a discriminator unit (Rw), from the determined amplitudes (al, a2) of the high-pass and the low-pass filtered signal, and the adaptive filter coefficients.
Assignee:
SIEMENS AKTIENGESELLSCHAFT
Filing Date:
11 August 1998
Grant Date:
17 March 1999
Patent Classes:
Current International Class:
H04L0273000000
