GB1444821A – Distortion correcting devices for partial response signals
– Google Patents
GB1444821A – Distortion correcting devices for partial response signals
– Google Patents
Distortion correcting devices for partial response signals
Info
Publication number
GB1444821A
GB1444821A
GB4571173A
GB4571173A
GB1444821A
GB 1444821 A
GB1444821 A
GB 1444821A
GB 4571173 A
GB4571173 A
GB 4571173A
GB 4571173 A
GB4571173 A
GB 4571173A
GB 1444821 A
GB1444821 A
GB 1444821A
Authority
GB
United Kingdom
Prior art keywords
equalizer
shift register
output
partial response
amplifiers
Prior art date
1973-01-05
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
GB4571173A
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.)
Siemens AG
Original Assignee
Siemens AG
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.)
1973-01-05
Filing date
1973-10-01
Publication date
1976-08-04
1973-01-05
Priority claimed from DE19732300480
external-priority
patent/DE2300480C3/en
1973-10-01
Application filed by Siemens AG
filed
Critical
Siemens AG
1976-08-04
Publication of GB1444821A
publication
Critical
patent/GB1444821A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
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
H04L25/03019—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception
H04L25/03057—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception with a recursive structure
H—ELECTRICITY
H04—ELECTRIC COMMUNICATION TECHNIQUE
H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
H04L25/00—Baseband systems
H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
H04L25/40—Transmitting circuits; Receiving circuits
H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
H04L25/497—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems by correlative coding, e.g. partial response coding or echo modulation coding transmitters and receivers for partial response systems
Abstract
1444821 Equalizer for partial response signals SIEMENS AG 1 Oct 1973 [5 Jan 1973] 45711/73 Heading H4R In an equalizer for a transmission system employing partial response signalling tap gains of a transversal filter are adjusted by correlation of an error signal derived from the equalizer output with a signal from an adder combining signals from more than one tap of the equalizer delay device. As described the signal is of the form where a «1» is transmitted as the sequence «+1, 0, – 1,» and the signal received from the transmission system is applied to the shift register having stages 26, 27, 28, connected by variable gain amplifiers 45, 46, 47, 48 to an adder 23 from which the output of the equalizer is derived. The equalizer output feeds both directly, and via a theoretical value detector and inverter 37 to the respective inputs of the adder 24 so as to derive an error signal which is fed to the correlators 35, and 36. Also fed to the correlators are signals from adders 21 and 22 each of which derives its inputs from points on the shift register spaced by two stages, and the output of the correlators is used to modify the gain settings of the respective amplifiers 47, 48. The shift register 26, 27, 28 and amplifiers 45, 46, 47, 48, remove the pre-pulse distortion while post pulse distortion is removed by the shift register 30, 31, 32, 33, and variable gain amplifiers 49, 50, which portion of the equalizer is the subject of the Specification 1,444,322.
GB4571173A
1973-01-05
1973-10-01
Distortion correcting devices for partial response signals
Expired
GB1444821A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
DE19732300480
DE2300480C3
(en)
1973-01-05
Equalizer for partial information signals
Publications (1)
Publication Number
Publication Date
GB1444821A
true
GB1444821A
(en)
1976-08-04
Family
ID=5868370
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB4571173A
Expired
GB1444821A
(en)
1973-01-05
1973-10-01
Distortion correcting devices for partial response signals
Country Status (9)
Country
Link
JP
(1)
JPS49103554A
(en)
BE
(1)
BE809415A
(en)
CH
(1)
CH574191A5
(en)
FR
(1)
FR2213627B1
(en)
GB
(1)
GB1444821A
(en)
IT
(1)
IT1000747B
(en)
LU
(1)
LU69101A1
(en)
NL
(1)
NL7317794A
(en)
SE
(1)
SE385073B
(en)
Cited By (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US4439863A
(en)
*
1980-11-28
1984-03-27
Rockwell International Corporation
Partial response system with simplified detection
Family Cites Families (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3356947A
(en)
*
1963-12-23
1967-12-05
Cardion Electronics Inc
Wave-signal dispersion correcting network
US3311836A
(en)
*
1964-12-07
1967-03-28
Cardion Electronics Inc
System for translating pulse signals accompanied by spurious side pulses
US3508153A
(en)
*
1967-09-11
1970-04-21
Bell Telephone Labor Inc
Automatic equalizer for partial-response data transmission systems
1973
1973-10-01
GB
GB4571173A
patent/GB1444821A/en
not_active
Expired
1973-11-21
CH
CH1641973A
patent/CH574191A5/xx
unknown
1973-12-21
IT
IT5450173A
patent/IT1000747B/en
active
1973-12-27
JP
JP433874A
patent/JPS49103554A/ja
active
Pending
1973-12-28
FR
FR7347069A
patent/FR2213627B1/fr
not_active
Expired
1973-12-28
NL
NL7317794A
patent/NL7317794A/xx
not_active
Application Discontinuation
1974
1974-01-03
LU
LU69101A
patent/LU69101A1/xx
unknown
1974-01-04
BE
BE139537A
patent/BE809415A/en
unknown
1974-01-04
SE
SE7400097A
patent/SE385073B/en
unknown
Cited By (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US4439863A
(en)
*
1980-11-28
1984-03-27
Rockwell International Corporation
Partial response system with simplified detection
Also Published As
Publication number
Publication date
NL7317794A
(en)
1974-07-09
LU69101A1
(en)
1974-08-19
DE2300480B2
(en)
1976-06-10
CH574191A5
(en)
1976-03-31
JPS49103554A
(en)
1974-10-01
IT1000747B
(en)
1976-04-10
FR2213627A1
(en)
1974-08-02
DE2300480A1
(en)
1974-07-11
SE385073B
(en)
1976-05-31
BE809415A
(en)
1974-07-04
FR2213627B1
(en)
1976-06-25
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Legal Events
Date
Code
Title
Description
1976-12-15
PS
Patent sealed
1979-05-10
PCNP
Patent ceased through non-payment of renewal fee
