JPS5797236A - Training system for data modem - Google Patents

Training system for data modem

Info

Publication number
JPS5797236A
JPS5797236A JP17309180A JP17309180A JPS5797236A JP S5797236 A JPS5797236 A JP S5797236A JP 17309180 A JP17309180 A JP 17309180A JP 17309180 A JP17309180 A JP 17309180A JP S5797236 A JPS5797236 A JP S5797236A
Authority
JP
Japan
Prior art keywords
segment
signal
training
modem3
automatic equalizer
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
JP17309180A
Other languages
Japanese (ja)
Other versions
JPH0124378B2 (en
Inventor
Shigeyuki Umigami
Yukihiro Mochida
Takashi Kaki
Kazuo Murano
Noriaki Fujimura
Tsuneo Kinoshita
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 JP17309180A priority Critical patent/JPS5797236A/en
Publication of JPS5797236A publication Critical patent/JPS5797236A/en
Publication of JPH0124378B2 publication Critical patent/JPH0124378B2/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)
  • Dc Digital Transmission (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

PURPOSE:To decrease the execution time of a training system, by using a modulation signal including an impulse train required for the convergence of an automatic equalizer as an initial training signal. CONSTITUTION:After the transmission of a transmission request from a terminal 1 to an MODEM3 via an MODEM2, a training signal is transmitted from the terminal 1 so that data can be received to the MODEM3 via a line 4 surely. The MODEM3 receives the training signal and sets up an automatic equalizer, an AGC circuit and a synchronizing circuit and the like. The training sequence is executed by sequentially receiving the training signal of 4' from a segment 1'. The segment 1' is only carrier, the segment 2' is a signal alternately repeating zero and pi phase, the segment 3' is a modulation signal including an impulse train required for the convergence of the automatic equalizer and consists of subsegments 3'-1, 3'-3 the same as the segment 2 and a subsegment 3'-2 for a signal in which the repetition of zero and pi phase is intermittent for one symbol time. A segment 4' is only a PN signal.
JP17309180A 1980-12-10 1980-12-10 Training system for data modem Granted JPS5797236A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17309180A JPS5797236A (en) 1980-12-10 1980-12-10 Training system for data modem

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17309180A JPS5797236A (en) 1980-12-10 1980-12-10 Training system for data modem

Publications (2)

Publication Number Publication Date
JPS5797236A true JPS5797236A (en) 1982-06-16
JPH0124378B2 JPH0124378B2 (en) 1989-05-11

Family

ID=15954023

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17309180A Granted JPS5797236A (en) 1980-12-10 1980-12-10 Training system for data modem

Country Status (1)

Country Link
JP (1) JPS5797236A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4597089A (en) * 1983-07-11 1986-06-24 Hycom Incorporated Single pulse fast learn modem
US8665936B2 (en) 2012-02-15 2014-03-04 Hewlett-Packard Development Company, L.P. Experiments transmitter training systems and method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4597089A (en) * 1983-07-11 1986-06-24 Hycom Incorporated Single pulse fast learn modem
US8665936B2 (en) 2012-02-15 2014-03-04 Hewlett-Packard Development Company, L.P. Experiments transmitter training systems and method

Also Published As

Publication number Publication date
JPH0124378B2 (en) 1989-05-11

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