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JPS5678243A - Data mode converging method - Google Patents

  • ️Sat Jun 27 1981

JPS5678243A - Data mode converging method - Google Patents

Data mode converging method

Info

Publication number
JPS5678243A
JPS5678243A JP15534279A JP15534279A JPS5678243A JP S5678243 A JPS5678243 A JP S5678243A JP 15534279 A JP15534279 A JP 15534279A JP 15534279 A JP15534279 A JP 15534279A JP S5678243 A JPS5678243 A JP S5678243A Authority
JP
Japan
Prior art keywords
equalizer
output
error
circuit
tap
Prior art date
1979-11-30
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
JP15534279A
Other languages
Japanese (ja)
Other versions
JPS631781B2 (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.)
1979-11-30
Filing date
1979-11-30
Publication date
1981-06-27
1979-11-30 Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
1979-11-30 Priority to JP15534279A priority Critical patent/JPS5678243A/en
1981-06-27 Publication of JPS5678243A publication Critical patent/JPS5678243A/en
1988-01-14 Publication of JPS631781B2 publication Critical patent/JPS631781B2/ja
Status 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

PURPOSE:To make it possible to converge a data mode by fixing the center tap of an equalizer at a constant value while correcting other taps, by controlling the mean electric power of an equalizer output so that it will agree with the mean electric power of the reference signal of a receiver. CONSTITUTION:Delay circuit T of transversal type automatic equalizer 10 convolute input data Xi and tap coefficients C-N-CN to eqaulize the input waveform. Then when the divergence of equalizer 10 is detected, center tap coefficient CO is fixed to a certain value, and consequently the ground of the convergence of equalizer 10 is secured. Next, multiplying circuit 7 that extracts only error e' is driven by decision error (e) of subtracter 6 receiving the output of multiplying circuit 1 and a reference signal to supply error e' to tap correcting circuit 8 that corrects the divergent equalization output. Next, other taps are corrected to converge the divergency of equalizer 10 without decreasing the processing efficiency of the whole system.

JP15534279A 1979-11-30 1979-11-30 Data mode converging method Granted JPS5678243A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15534279A JPS5678243A (en) 1979-11-30 1979-11-30 Data mode converging method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15534279A JPS5678243A (en) 1979-11-30 1979-11-30 Data mode converging method

Publications (2)

Publication Number Publication Date
JPS5678243A true JPS5678243A (en) 1981-06-27
JPS631781B2 JPS631781B2 (en) 1988-01-14

Family

ID=15603788

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15534279A Granted JPS5678243A (en) 1979-11-30 1979-11-30 Data mode converging method

Country Status (1)

Country Link
JP (1) JPS5678243A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6286926A (en) * 1985-10-03 1987-04-21 ジ−メンス・アクチエンゲゼルシヤフト Adaptive transversal equalizer
US5719641A (en) * 1994-10-20 1998-02-17 Nec Corporation VOD reception with demodulation and quantization held during carrier switching to produce a video signal before the carrier switching

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 (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6286926A (en) * 1985-10-03 1987-04-21 ジ−メンス・アクチエンゲゼルシヤフト Adaptive transversal equalizer
US5719641A (en) * 1994-10-20 1998-02-17 Nec Corporation VOD reception with demodulation and quantization held during carrier switching to produce a video signal before the carrier switching

Also Published As

Publication number Publication date
JPS631781B2 (en) 1988-01-14

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