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WO1996002995A3 - Transmission de donnees par changement de frequence - Google Patents

Transmission de donnees par changement de frequence Download PDF

Info

Publication number
WO1996002995A3
WO1996002995A3 PCT/DE1995/000842 DE9500842W WO9602995A3 WO 1996002995 A3 WO1996002995 A3 WO 1996002995A3 DE 9500842 W DE9500842 W DE 9500842W WO 9602995 A3 WO9602995 A3 WO 9602995A3
Authority
WO
WIPO (PCT)
Prior art keywords
data
transmission
data transmission
frequency shift
signal
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.)
Ceased
Application number
PCT/DE1995/000842
Other languages
German (de)
English (en)
Other versions
WO1996002995A2 (fr
Inventor
Hilmar Locher
Rudi Schneider
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens 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 Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of WO1996002995A2 publication Critical patent/WO1996002995A2/fr
Publication of WO1996002995A3 publication Critical patent/WO1996002995A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
    • H04B10/114—Indoor or close-range type systems
    • H04B10/1149—Arrangements for indoor wireless networking of information

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computing Systems (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Small-Scale Networks (AREA)

Abstract

L'invention concerne un procédé et une configuration de transmission de données entre plusieurs abonnés (1, 3, 4, 5). Les données sont modulées par changement de fréquence, ce qui permet de produire un signal de transmission (14...19). Les fréquences porteuses affectées à chaque valeur constituent des multiples entiers de la moitié du débit des données et les signaux des fréquences porteuses sont couplés asservis en phase au signal de données, de sorte que la phase des signaux des fréquences porteuses coïncide, chaque fois que les données changent de valeur. Un abonné central (1) émet, y compris pendant les pauses de transmission, pendant lesquelles aucune donnée ne doit être transmise, un signal de transmission (14, 15, 19) avec une fréquence porteuse d'une valeur de donnée, ce signal étant reçu, démodulé et utilisé à des fins de synchronisation par les autres abonnés (3, 4, 5). L'invention présente l'avantage de n'entraîner aucune perte de données au début d'un message, et de permettre l'utilisation de moyens de transmission dont la fréquence de coupure se situe dans le même ordre de grandeur que le débit des données. L'invention peut être utilisée dans la transmission des données en général.
PCT/DE1995/000842 1994-07-13 1995-06-29 Transmission de donnees par changement de frequence Ceased WO1996002995A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP4424741.9 1994-07-13
DE19944424741 DE4424741A1 (de) 1994-07-13 1994-07-13 Verfahren und Anordnung zur Übertragung von Daten

Publications (2)

Publication Number Publication Date
WO1996002995A2 WO1996002995A2 (fr) 1996-02-01
WO1996002995A3 true WO1996002995A3 (fr) 1996-04-25

Family

ID=6523065

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1995/000842 Ceased WO1996002995A2 (fr) 1994-07-13 1995-06-29 Transmission de donnees par changement de frequence

Country Status (2)

Country Link
DE (1) DE4424741A1 (fr)
WO (1) WO1996002995A2 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0147008A2 (fr) * 1983-09-30 1985-07-03 Texas Instruments Incorporated Modem digital utilisant la modulatio n à déplacement de fréquence
US4700364A (en) * 1984-09-28 1987-10-13 Nec Corporation FSK with continuous phase and continuous slope at bit transitions

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0147008A2 (fr) * 1983-09-30 1985-07-03 Texas Instruments Incorporated Modem digital utilisant la modulatio n à déplacement de fréquence
US4700364A (en) * 1984-09-28 1987-10-13 Nec Corporation FSK with continuous phase and continuous slope at bit transitions

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
FABBRI & BLAUSCHILD: "Fleetest FSK modem chips can go the distance", ELECTRONIC DESIGN, vol. 31, no. 16, HASBROUCK HEIGHTS, NEW JERSEY US, pages 123 - 130 *
STAUFFER: "Single-chip FSK modem expands your design choices", EDN ELECTRICAL DESIGN NEWS, vol. 27, no. 10, NEWTON, MASSACHUSETTS US, pages 143 - 151 *
VAN TOL & ROS: "VECOM short-range communication with vehicles", PHILIPS TELECOMMUNICATION REVIEW, vol. 41, no. 3, HILVERSUM NL, pages 235 - 249 *

Also Published As

Publication number Publication date
WO1996002995A2 (fr) 1996-02-01
DE4424741A1 (de) 1996-01-18

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121 Ep: the epo has been informed by wipo that ep was designated in this application
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
122 Ep: pct application non-entry in european phase