JPS5752215A - Automatic equalizing system - Google Patents

Automatic equalizing system

Info

Publication number
JPS5752215A
JPS5752215A JP12648780A JP12648780A JPS5752215A JP S5752215 A JPS5752215 A JP S5752215A JP 12648780 A JP12648780 A JP 12648780A JP 12648780 A JP12648780 A JP 12648780A JP S5752215 A JPS5752215 A JP S5752215A
Authority
JP
Japan
Prior art keywords
tap factor
register
tap
string
accumulator
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.)
Granted
Application number
JP12648780A
Other languages
Japanese (ja)
Other versions
JPH0313763B2 (en
Inventor
Shigeyuki Umigami
Kazuo Murano
Kuninosuke Ihira
Takashi Kako
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.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP12648780A priority Critical patent/JPS5752215A/en
Publication of JPS5752215A publication Critical patent/JPS5752215A/en
Publication of JPH0313763B2 publication Critical patent/JPH0313763B2/ja
Granted 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
    • H04L25/02—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
    • H04L25/03038—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception with a non-recursive structure

Landscapes

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

Abstract

PURPOSE:To execute an automatic equalization by a simple means using an impulse, by using an obtained tap factor value as a tap factor of a transversal filter, in an automatic equalizer of the transversal filter. CONSTITUTION:A training signal is applied to an inpulse regenerating circuit 1, a regenerated impulse sequence is inputted to a delay register 2, is provided to a register group 4 as an initial value of a tap factor, and correlation Aj to the impulse sequence is derived by a correlator 3. A new tap factor string which has been corrected and derived at every tap by the correlation Aj obtained by a tap factor correcting device 5 is latched by the register group 4, and is used for the next operation. After such an operation is repeated several times, the tap factor string is shifted to a register 9. A signal of the transmission line is led to a register 6, and cumulative multiplication by each tap factor string is executed. An output of a multiplier group 7 is cumulated by an accumulator 8, and an equalized signal is obtained as an output of the accumulator 8.
JP12648780A 1980-09-11 1980-09-11 Automatic equalizing system Granted JPS5752215A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12648780A JPS5752215A (en) 1980-09-11 1980-09-11 Automatic equalizing system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12648780A JPS5752215A (en) 1980-09-11 1980-09-11 Automatic equalizing system

Publications (2)

Publication Number Publication Date
JPS5752215A true JPS5752215A (en) 1982-03-27
JPH0313763B2 JPH0313763B2 (en) 1991-02-25

Family

ID=14936415

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12648780A Granted JPS5752215A (en) 1980-09-11 1980-09-11 Automatic equalizing system

Country Status (1)

Country Link
JP (1) JPS5752215A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5964912A (en) * 1982-10-05 1984-04-13 Nec Corp Digital filter
GB2422989A (en) * 2005-02-03 2006-08-09 Agilent Technologies Inc Correlating a received data signal with a time delayed version of the signal to obtain a measurement of inter-symbol interference
CN106003709A (en) * 2016-05-06 2016-10-12 广东汉邦激光科技有限公司 Powder supply device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5242350A (en) * 1975-09-30 1977-04-01 Nec Corp Preset type automatic equalizer for partial response system
JPS5283010A (en) * 1975-12-30 1977-07-11 Ibm Method of determining initial value of complex transversal equalizer factor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5242350A (en) * 1975-09-30 1977-04-01 Nec Corp Preset type automatic equalizer for partial response system
JPS5283010A (en) * 1975-12-30 1977-07-11 Ibm Method of determining initial value of complex transversal equalizer factor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5964912A (en) * 1982-10-05 1984-04-13 Nec Corp Digital filter
GB2422989A (en) * 2005-02-03 2006-08-09 Agilent Technologies Inc Correlating a received data signal with a time delayed version of the signal to obtain a measurement of inter-symbol interference
CN106003709A (en) * 2016-05-06 2016-10-12 广东汉邦激光科技有限公司 Powder supply device

Also Published As

Publication number Publication date
JPH0313763B2 (en) 1991-02-25

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