JPS55133142A - Estimation system for gain of communication line - Google Patents

Estimation system for gain of communication line

Info

Publication number
JPS55133142A
JPS55133142A JP4069179A JP4069179A JPS55133142A JP S55133142 A JPS55133142 A JP S55133142A JP 4069179 A JP4069179 A JP 4069179A JP 4069179 A JP4069179 A JP 4069179A JP S55133142 A JPS55133142 A JP S55133142A
Authority
JP
Japan
Prior art keywords
communication line
gain
low pass
pass filter
frequency
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.)
Pending
Application number
JP4069179A
Other languages
Japanese (ja)
Inventor
Kensaku Fujii
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 JP4069179A priority Critical patent/JPS55133142A/en
Publication of JPS55133142A publication Critical patent/JPS55133142A/en
Pending 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
    • H04B3/10—Control of transmission; Equalising by pilot signal

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

PURPOSE:To estimate the gain of communication line from the reception signal of the information transmission signal, by using the low pass filter without using the auxiliary signal for special communication path gain estimation. CONSTITUTION:The set of the reception signal every T[=1/(2Wm)] second (where; Wm is the cut-off frequency) of information transmission signal via the communication line is inputted to some low pass filters 1. Further, the number of reception signals included in T second section is taken as N. The low pass filter 1 is the low pass filter having the cut-off frequency equal to the upper limit frequnecy WHz of the frequency component having the communication line gain variation or more, and the gain of communication line can only be picked up by taking 1/N of the output of the low pass filter 1.
JP4069179A 1979-04-04 1979-04-04 Estimation system for gain of communication line Pending JPS55133142A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4069179A JPS55133142A (en) 1979-04-04 1979-04-04 Estimation system for gain of communication line

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4069179A JPS55133142A (en) 1979-04-04 1979-04-04 Estimation system for gain of communication line

Publications (1)

Publication Number Publication Date
JPS55133142A true JPS55133142A (en) 1980-10-16

Family

ID=12587569

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4069179A Pending JPS55133142A (en) 1979-04-04 1979-04-04 Estimation system for gain of communication line

Country Status (1)

Country Link
JP (1) JPS55133142A (en)

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