FR2251138A1 - - Google Patents

Info

Publication number
FR2251138A1
FR2251138A1 FR7437893A FR7437893A FR2251138A1 FR 2251138 A1 FR2251138 A1 FR 2251138A1 FR 7437893 A FR7437893 A FR 7437893A FR 7437893 A FR7437893 A FR 7437893A FR 2251138 A1 FR2251138 A1 FR 2251138A1
Authority
FR
France
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
FR7437893A
Other versions
FR2251138B1 (fr
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of FR2251138A1 publication Critical patent/FR2251138A1/fr
Application granted granted Critical
Publication of FR2251138B1 publication Critical patent/FR2251138B1/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
    • H04L1/04—Arrangements for detecting or preventing errors in the information received by diversity reception using frequency diversity

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Radio Transmission System (AREA)
FR7437893A 1973-11-09 1974-11-18 Expired FR2251138B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7315253A SE377643B (fr) 1973-11-09 1973-11-09

Publications (2)

Publication Number Publication Date
FR2251138A1 true FR2251138A1 (fr) 1975-06-06
FR2251138B1 FR2251138B1 (fr) 1978-09-29

Family

ID=20319068

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7437893A Expired FR2251138B1 (fr) 1973-11-09 1974-11-18

Country Status (6)

Country Link
US (1) US3953798A (fr)
JP (1) JPS5224361B2 (fr)
DE (1) DE2452997C3 (fr)
FR (1) FR2251138B1 (fr)
GB (1) GB1486235A (fr)
SE (1) SE377643B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1982002633A1 (fr) * 1981-01-29 1982-08-05 Wilkinson Robert Graham Ameliorations aux communications a haute frequence
FR2577733A1 (fr) * 1985-02-14 1986-08-22 Enertec Procede et systeme de transmission en bande etalee, notamment pour la transmission d'informations sur un reseau de distribution d'energie electrique
EP0309855A2 (fr) * 1987-09-29 1989-04-05 Ascom Zelcom Ag Procédé et dispositif de transmission d'adresses sélectives et/ou de signaux de détresse dans des réseaux radio à ondes courtes

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4090135A (en) * 1976-06-29 1978-05-16 The United States Of America As Represented By The Secretary Of The Interior Wireless FSK technique for telemetering underground data to the surface
US4184116A (en) * 1977-04-07 1980-01-15 Argos Products Company, Inc. Communication system having analog-to-digital-to-analog conversion means
US4390975A (en) * 1978-03-20 1983-06-28 Nl Sperry-Sun, Inc. Data transmission in a drill string
US4616364A (en) * 1984-06-18 1986-10-07 Itt Corporation Digital hopped frequency, time diversity system
US5808285A (en) * 1990-09-17 1998-09-15 Metrologic Instruments, Inc. Portable code symbol reading device with one-way wireless data packet transmission link to base unit employing condition-dependent acoustical signalling for data packet reception acknowledgement
US7077327B1 (en) * 1990-09-17 2006-07-18 Metrologic Instruments, Inc. System for reading bar code symbols using bar code readers having RF signal transmission links with base stations
US5121407A (en) * 1990-09-27 1992-06-09 Pittway Corporation Spread spectrum communications system
US5983112A (en) * 1990-12-06 1999-11-09 Hughes Electronics Corporation Frequency, time and power level diversity system for digital radio telephony
US6460769B1 (en) 1991-09-17 2002-10-08 Metrologic Instruments, Inc. System for reading bar code symbols using portable bar code symbol readers having one-way RF signal transmission links with base stations
US6761317B1 (en) 1991-09-17 2004-07-13 Metrologic Instruments, Inc. Reading bar code symbols using readers having one-way RF signal transmission links with base stations
US6512799B2 (en) 2001-02-06 2003-01-28 University Of South Alabama Digital communication system and method for increased bit rates
JP6270107B2 (ja) * 2013-09-30 2018-01-31 日本信号株式会社 自動列車制御装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL6402192A (fr) * 1964-03-05 1965-09-06
NL145117B (nl) * 1966-02-26 1975-02-17 Philips Nv Foutencorrigerend informatietransmissiesysteem.
US3842352A (en) * 1972-07-14 1974-10-15 Us Air Force Communications system having single rf channel diversity means

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1982002633A1 (fr) * 1981-01-29 1982-08-05 Wilkinson Robert Graham Ameliorations aux communications a haute frequence
FR2577733A1 (fr) * 1985-02-14 1986-08-22 Enertec Procede et systeme de transmission en bande etalee, notamment pour la transmission d'informations sur un reseau de distribution d'energie electrique
EP0194902A1 (fr) * 1985-02-14 1986-09-17 Schlumberger Industries Procédé et système de transmission en bande étalée, notamment pour la transmission d'information sur un réseau de distribution d'énergie électrique
EP0309855A2 (fr) * 1987-09-29 1989-04-05 Ascom Zelcom Ag Procédé et dispositif de transmission d'adresses sélectives et/ou de signaux de détresse dans des réseaux radio à ondes courtes
EP0309855A3 (fr) * 1987-09-29 1989-09-13 Ascom Zelcom Ag Procédé et dispositif de transmission d'adresses sélectives et/ou de signaux de détresse dans des réseaux radio à ondes courtes

Also Published As

Publication number Publication date
FR2251138B1 (fr) 1978-09-29
DE2452997B2 (de) 1977-10-06
JPS5224361B2 (fr) 1977-06-30
DE2452997C3 (de) 1978-06-01
JPS5081212A (fr) 1975-07-01
GB1486235A (en) 1977-09-21
DE2452997A1 (de) 1975-05-15
SE7315253L (fr) 1975-05-12
SE377643B (fr) 1975-07-14
US3953798A (en) 1976-04-27

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Legal Events

Date Code Title Description
ST Notification of lapse