JPS5678244A - Data training system - Google Patents

Data training system

Info

Publication number
JPS5678244A
JPS5678244A JP15534379A JP15534379A JPS5678244A JP S5678244 A JPS5678244 A JP S5678244A JP 15534379 A JP15534379 A JP 15534379A JP 15534379 A JP15534379 A JP 15534379A JP S5678244 A JPS5678244 A JP S5678244A
Authority
JP
Japan
Prior art keywords
signal
data
circuit
normalizing
output 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.)
Granted
Application number
JP15534379A
Other languages
Japanese (ja)
Other versions
JPS631782B2 (en
Inventor
Shigeyuki Umigami
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 JP15534379A priority Critical patent/JPS5678244A/en
Publication of JPS5678244A publication Critical patent/JPS5678244A/en
Publication of JPS631782B2 publication Critical patent/JPS631782B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/04—Control of transmission; Equalising
    • H04B3/14—Control of transmission; Equalising characterised by the equalising network used
    • H04B3/142—Control of transmission; Equalising characterised by the equalising network used using echo-equalisers, e.g. transversal

Abstract

PURPOSE:To make a match point system effective when data are transmitted by use of an equalizer with the center tap position unfixed, by enabling the equalizer which gets divergent to converge by data without requiring a training signal again. CONSTITUTION:Output Y of transversal part E is multiplied by signal AP controlled by phase correcting circuit 1 having PLL composed of a double differentiating circuit so as to output signal S. This signal S is compared with reference signal R by comparator 2 and when difference (e) is found, the difference (e) is fed back via line l1 so as to correct each tap coefficient of transversal part E. On the other hand, amplitude information is normalized by normalizing circuit 3 with normalizing data from normalizing data generation part 4 to extract phase error Pe, which is applied to circuit 1, output signal A0 from which is controlled with a signal having a little interference between signals to output signal Ap. Even if transversal part E diverges, the meal electric power of data is made to agree with electric power determined unconditionally by predetermined signal arrangement.
JP15534379A 1979-11-30 1979-11-30 Data training system Granted JPS5678244A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15534379A JPS5678244A (en) 1979-11-30 1979-11-30 Data training system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15534379A JPS5678244A (en) 1979-11-30 1979-11-30 Data training system

Publications (2)

Publication Number Publication Date
JPS5678244A true JPS5678244A (en) 1981-06-27
JPS631782B2 JPS631782B2 (en) 1988-01-14

Family

ID=15603810

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15534379A Granted JPS5678244A (en) 1979-11-30 1979-11-30 Data training system

Country Status (1)

Country Link
JP (1) JPS5678244A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007028161A (en) * 2005-07-15 2007-02-01 Japan Radio Co Ltd Amplitude/phase controller and receiving system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55700A (en) * 1978-06-13 1980-01-07 Ibm Device for training adaptive equalizer

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55700A (en) * 1978-06-13 1980-01-07 Ibm Device for training adaptive equalizer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007028161A (en) * 2005-07-15 2007-02-01 Japan Radio Co Ltd Amplitude/phase controller and receiving system

Also Published As

Publication number Publication date
JPS631782B2 (en) 1988-01-14

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