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WO1996002995A3 - Data transmission by frequency shift - Google Patents

Data transmission by frequency shift 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
Application number
PCT/DE1995/000842
Other languages
German (de)
French (fr)
Other versions
WO1996002995A2 (en
Inventor
Hilmar Locher
Rudi Schneider
Original Assignee
Siemens Ag
Hilmar Locher
Rudi Schneider
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, Hilmar Locher, Rudi Schneider filed Critical Siemens Ag
Publication of WO1996002995A2 publication Critical patent/WO1996002995A2/en
Publication of WO1996002995A3 publication Critical patent/WO1996002995A3/en

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

The invention concerns a method and layout for transmitting data between several subscribers (1, 3, 4, 5). The data are modulated by frequency shift keying to produce a transmission signal (14... 19), the carrier frequencies allocated to particular values being exact multiples of half the data transmission rate and the carrier frequency signals being coupled to the data signal in such a way as to be locked in phase, so that the phase of the carrier frequency signals matches whenever the data value changes. A central subscriber (1) sends out a transmission signal (14, 15, 19) which the other subscribers (3, 4, 5) receive, demodulate and use for synchronisation, even in breaks between communications in which there are no data to be transmitted. The invention has the advantage that there is no data loss at the start of a transmission and transmission systems can be used whose cutoff frequency is of the same order as the data transmission rate. The invention can be used in data transmission in general.
PCT/DE1995/000842 1994-07-13 1995-06-29 Data transmission by frequency shift WO1996002995A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19944424741 DE4424741A1 (en) 1994-07-13 1994-07-13 Method and arrangement for the transmission of data
DEP4424741.9 1994-07-13

Publications (2)

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

Family

ID=6523065

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1995/000842 WO1996002995A2 (en) 1994-07-13 1995-06-29 Data transmission by frequency shift

Country Status (2)

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

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0147008A2 (en) * 1983-09-30 1985-07-03 Texas Instruments Incorporated Bilateral digital FSK communication system interface using digital technique
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 (en) * 1983-09-30 1985-07-03 Texas Instruments Incorporated Bilateral digital FSK communication system interface using digital technique
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
DE4424741A1 (en) 1996-01-18
WO1996002995A2 (en) 1996-02-01

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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)
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