GB1444822A - Distortion correcting devices for partial response signals - Google Patents

Distortion correcting devices for partial response signals

Info

Publication number
GB1444822A
GB1444822A GB4587373A GB4587373A GB1444822A GB 1444822 A GB1444822 A GB 1444822A GB 4587373 A GB4587373 A GB 4587373A GB 4587373 A GB4587373 A GB 4587373A GB 1444822 A GB1444822 A GB 1444822A
Authority
GB
United Kingdom
Prior art keywords
adder
shift register
partial response
pulse
output
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
GB4587373A
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.)
Filing date
Publication date
Priority claimed from DE19732300454 external-priority patent/DE2300454C3/en
Application filed by Siemens AG filed Critical Siemens AG
Publication of GB1444822A publication Critical patent/GB1444822A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Filters That Use Time-Delay Elements (AREA)

Abstract

1444822 Equalizer for partial response signals SIEMENS AG 2 Oct 1973 [5 Jan 1973] 45873/73 Heading H4R An equalizer for a transmission system employing partial response signalling, and particularly for removing post pulse distortion from the received signal, has an adder 23 connected between an input a, and an output b with a second adder 25 connected between the output of the adder 23 and a shift register 30, 31, 32, 33, with a connection from the output of one of the shift register stages 30, to the second input of the second adder 25, and further connections between the outputs of the shift register stages via gain controlled amplifier 49, 50, to inputs to the first adder to cancel the post pulse distortion. As described pre-pulse interference is cancelled by the shift register 26, 27, 28, and variable gain amplifiers 45 to 48 in accordance with the Specification 1,444,821. The signal with pre-pulse interference cancelled is applied from adder 23 via second adder 25 to a rectifier, 38, which passes only positive pulses, and amplitude discriminator 38, which responds only to the main pulse and eliminates distortion components occurring at other times.
GB4587373A 1973-01-05 1973-10-02 Distortion correcting devices for partial response signals Expired GB1444822A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19732300454 DE2300454C3 (en) 1973-01-05 Equalizer for partial information signals

Publications (1)

Publication Number Publication Date
GB1444822A true GB1444822A (en) 1976-08-04

Family

ID=5868364

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4587373A Expired GB1444822A (en) 1973-01-05 1973-10-02 Distortion correcting devices for partial response signals

Country Status (9)

Country Link
JP (1) JPS49103555A (en)
BE (1) BE809414A (en)
CH (1) CH574693A5 (en)
FR (1) FR2213628B1 (en)
GB (1) GB1444822A (en)
IT (1) IT1000746B (en)
LU (1) LU69102A1 (en)
NL (1) NL7400119A (en)
SE (1) SE385072B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0363551B1 (en) * 1988-10-17 1994-12-07 International Business Machines Corporation Adaptive equalization for recording systems using partial-response signaling

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

Also Published As

Publication number Publication date
DE2300454B2 (en) 1976-08-12
CH574693A5 (en) 1976-04-15
BE809414A (en) 1974-07-04
DE2300454A1 (en) 1974-07-11
FR2213628A1 (en) 1974-08-02
IT1000746B (en) 1976-04-10
JPS49103555A (en) 1974-10-01
NL7400119A (en) 1974-07-09
FR2213628B1 (en) 1978-11-10
LU69102A1 (en) 1974-08-19
SE385072B (en) 1976-05-31

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Legal Events

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