GB1383286A - Digital transversal filter - Google Patents

Digital transversal filter

Info

Publication number
GB1383286A
GB1383286A GB3879673A GB3879673A GB1383286A GB 1383286 A GB1383286 A GB 1383286A GB 3879673 A GB3879673 A GB 3879673A GB 3879673 A GB3879673 A GB 3879673A GB 1383286 A GB1383286 A GB 1383286A
Authority
GB
United Kingdom
Prior art keywords
delay
output
difference
adder
signal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB3879673A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Publication of GB1383286A publication Critical patent/GB1383286A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/02—Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation
    • H04L27/06—Demodulator circuits; Receiver circuits
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H17/00—Networks using digital techniques
    • H03H17/02—Frequency selective networks
    • H03H17/06—Non-recursive filters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L25/03012—Arrangements for removing intersymbol interference operating in the time domain
    • H04L25/03114—Arrangements for removing intersymbol interference operating in the time domain non-adaptive, i.e. not adjustable, manually adjustable, or adjustable only during the reception of special signals
    • H04L25/03133—Arrangements for removing intersymbol interference operating in the time domain non-adaptive, i.e. not adjustable, manually adjustable, or adjustable only during the reception of special signals with a non-recursive structure

Abstract

1383286 Active filters INTERNATIONAL BUSINESS MACHINE CORP 16 Aug 1973 [23 Aug 1972] 38796/73 Heading H3U A digital filter comprises: a delay 2 of period (2K + 2)T, where K is a positive integer and T is the sampling period, the delay having a tap at an intermediate point defining a delay of (K+1)T; means 4 for summing the input to the delay, the output from the delay and the output from the tap weighted by a factor 2(- 1)<SP>k</SP> in weighting circuit 3; means 5, 6 for providing the difference between the output from summing means 4 and the difference provided an interval T earlier; and means 7, 8 for providing the difference between the output from means 5, 6 and this second difference an interval T earlier. The two signals corresponding to the earlier intervals are derived by delays 6, 8 of T. The output signal, g n+2 , is thus formed as the difference between a signal b n+ 2 fed to the positive input of adder 7, and the signal g n+1 fed to the negative input of adder 7 from the delay 8, that is The quantity b n+2 is similarly derived by delay 6 and adder 5 as where the output from adder 4 is given by the expression S being a sample of the input signal at the time denoted by the subscript.
GB3879673A 1972-08-23 1973-08-16 Digital transversal filter Expired GB1383286A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7230577A FR2197499A5 (en) 1972-08-23 1972-08-23

Publications (1)

Publication Number Publication Date
GB1383286A true GB1383286A (en) 1974-02-12

Family

ID=9103623

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3879673A Expired GB1383286A (en) 1972-08-23 1973-08-16 Digital transversal filter

Country Status (5)

Country Link
JP (1) JPS547430B2 (en)
CA (1) CA992160A (en)
DE (1) DE2339616A1 (en)
FR (1) FR2197499A5 (en)
GB (1) GB1383286A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004034664A2 (en) * 2002-10-08 2004-04-22 M/A-Com, Inc. Apparatus, methods and articles of manufacture for noise reduction in electromagnetic signal processing
US7298854B2 (en) 2002-12-04 2007-11-20 M/A-Com, Inc. Apparatus, methods and articles of manufacture for noise reduction in electromagnetic signal processing

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4302631A (en) * 1979-11-28 1981-11-24 International Telephone And Telegraph Corporation Decimator apparatus for decreasing the word rate of a digital signal of the type employed in digital telephone systems
NL8006543A (en) * 1980-12-02 1982-07-01 Philips Nv SELF-ADJUSTING FILTER.
US5031132A (en) * 1990-02-27 1991-07-09 Analogic Corporation Circuit for convolving a set of digital data

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004034664A2 (en) * 2002-10-08 2004-04-22 M/A-Com, Inc. Apparatus, methods and articles of manufacture for noise reduction in electromagnetic signal processing
WO2004034664A3 (en) * 2002-10-08 2004-05-27 Ma Com Inc Apparatus, methods and articles of manufacture for noise reduction in electromagnetic signal processing
US7298854B2 (en) 2002-12-04 2007-11-20 M/A-Com, Inc. Apparatus, methods and articles of manufacture for noise reduction in electromagnetic signal processing

Also Published As

Publication number Publication date
JPS547430B2 (en) 1979-04-06
CA992160A (en) 1976-06-29
DE2339616A1 (en) 1974-03-07
JPS4947053A (en) 1974-05-07
FR2197499A5 (en) 1974-03-22

Similar Documents

Publication Publication Date Title
ES451204A1 (en) Digital phase shifter
GB1287390A (en) Improvements in or relating to digital filters
EP0084945A3 (en) Direct digital to digital sampling rate conversion method and apparatus
GB1418616A (en) Digital filter
JPS56153892A (en) Comb type filter
GB1461477A (en) Recursive digital filter
GB1409681A (en) Frequency discriminator
GB1383286A (en) Digital transversal filter
GB1304789A (en)
GB1458902A (en) Digital recursive filter apparatus
GB1249273A (en) Signal filter
GB1459465A (en) Equalizer
JPS56160175A (en) Synchronous signal generator
GB1518006A (en) Frequency-selective signal receiver
GB1430212A (en) High speed data separator
GB1485860A (en) Digital filters
GB1437205A (en) Digital equipment for forming a frequency multiplex system
GB1287845A (en)
JPS6489765A (en) Noise reduction circuit
GB1462891A (en) Digital filter
GB1526420A (en) Electrical circuit arrangement for reducing or eliminating decay distortion of an electrical signal pulse
GB1460369A (en) Digital filter
SU1061270A2 (en) Signal transmission device
JPS5377438A (en) Digital filter
SU708535A1 (en) Device for compression of facsimile signal frequency band

Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee