JPS56169441A - Phase information extracting circuit - Google Patents

Phase information extracting circuit

Info

Publication number
JPS56169441A
JPS56169441A JP7340480A JP7340480A JPS56169441A JP S56169441 A JPS56169441 A JP S56169441A JP 7340480 A JP7340480 A JP 7340480A JP 7340480 A JP7340480 A JP 7340480A JP S56169441 A JPS56169441 A JP S56169441A
Authority
JP
Japan
Prior art keywords
taps
delay line
phase information
information extracting
extracting circuit
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
JP7340480A
Other languages
Japanese (ja)
Other versions
JPS645771B2 (en
Inventor
Toshiyuki Tsuchiya
Nobuyuki Tokura
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone 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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP7340480A priority Critical patent/JPS56169441A/en
Publication of JPS56169441A publication Critical patent/JPS56169441A/en
Publication of JPS645771B2 publication Critical patent/JPS645771B2/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
    • H04B3/146—Control of transmission; Equalising characterised by the equalising network used using phase-frequency equalisers
    • H04B3/148—Control of transmission; Equalising characterised by the equalising network used using phase-frequency equalisers variable equalisers

Abstract

PURPOSE:To erase or attenuate echos, by providing a preequalizer at the prestage of a transversal type automatic equalizer. CONSTITUTION:An input signal from an IN terminal is given to a delay line 13 having taps every pulse time interval T0 and it is picked up from each tap to an adder 15 via a weighting circuit. Further, by adjusting each tap weighting circuit suitably, the echo produced at taps of the delay line 3 due to a group delay distortion can be attenuated. In the figure, the prequalizer EQ is shown as 1, a VSB demodulator DEM as 2 and the delay line with taps as phi, respectively.
JP7340480A 1980-05-30 1980-05-30 Phase information extracting circuit Granted JPS56169441A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7340480A JPS56169441A (en) 1980-05-30 1980-05-30 Phase information extracting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7340480A JPS56169441A (en) 1980-05-30 1980-05-30 Phase information extracting circuit

Publications (2)

Publication Number Publication Date
JPS56169441A true JPS56169441A (en) 1981-12-26
JPS645771B2 JPS645771B2 (en) 1989-01-31

Family

ID=13517217

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7340480A Granted JPS56169441A (en) 1980-05-30 1980-05-30 Phase information extracting circuit

Country Status (1)

Country Link
JP (1) JPS56169441A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59182636A (en) * 1983-03-31 1984-10-17 Fujitsu Ltd Data mode drawing system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59182636A (en) * 1983-03-31 1984-10-17 Fujitsu Ltd Data mode drawing system

Also Published As

Publication number Publication date
JPS645771B2 (en) 1989-01-31

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