GB1521722A - Frequency-shift digital data link system - Google Patents

Frequency-shift digital data link system

Info

Publication number
GB1521722A
GB1521722A GB2954575A GB2954575A GB1521722A GB 1521722 A GB1521722 A GB 1521722A GB 2954575 A GB2954575 A GB 2954575A GB 2954575 A GB2954575 A GB 2954575A GB 1521722 A GB1521722 A GB 1521722A
Authority
GB
United Kingdom
Prior art keywords
frequency
data
converter
bits
shift
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.)
Expired
Application number
GB2954575A
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.)
Singer Co
Original Assignee
Singer Co
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 Singer Co filed Critical Singer Co
Publication of GB1521722A publication Critical patent/GB1521722A/en
Expired 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

Abstract

1521722 Data transmission SINGER CO 15 July 1975 [24 July 1974] 29545/75 Heading H4P A frequency-shift digital data transmission system includes a transmitter having a source 10 producing a serial stream of data; a serial-parallel converter 14; an encoder 12 connected between the source 10 and the converter 14 to implement a forward error correction code into the data and to introduce a plurality of data bits and a plurality of redundancy bits into the converter 14 during each of a succession of baud intervals; and a plurality of frequency-shift keyers such as 1-16 for respectively receiving the data bits and redundancy bits therefrom for transmission, by way of a combiner 17 and a high frequency transmitter 18, over separate frequency channels during each baud interval. Of the receiver (Fig. 2, not shown) digital frequency detectors recover the transmitted data, and the specification explains how the apparatus operates to effect this recovery even though several channels may be rendered ineffective due to interference.
GB2954575A 1974-07-24 1975-07-15 Frequency-shift digital data link system Expired GB1521722A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US49127274A 1974-07-24 1974-07-24

Publications (1)

Publication Number Publication Date
GB1521722A true GB1521722A (en) 1978-08-16

Family

ID=23951491

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2954575A Expired GB1521722A (en) 1974-07-24 1975-07-15 Frequency-shift digital data link system

Country Status (2)

Country Link
FR (1) FR2280267A1 (en)
GB (1) GB1521722A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5577735A (en) * 1991-05-28 1996-11-26 Tci Technology, Inc. Computer software delivery system
WO2000050285A1 (en) * 1999-02-22 2000-08-31 Siemens Aktiengesellschaft Method for transmitting data via a traction control which carries an electrical driving current for vehicles

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR960675A (en) * 1942-01-31 1950-04-22
FR1250151A (en) * 1960-02-24 1961-01-06 Siemens Ag Method and installation for the transmission of telecommunication signals in bivalent code
US3795872A (en) * 1972-09-18 1974-03-05 Bell Telephone Labor Inc Protection scheme for clock signal recovery arrangement

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5577735A (en) * 1991-05-28 1996-11-26 Tci Technology, Inc. Computer software delivery system
US5944608A (en) * 1991-05-28 1999-08-31 Tci Technology, Inc. Computer software delivery system
US6126546A (en) * 1991-05-28 2000-10-03 Tci Technology Management, Llc Computer software delivery system
US6402618B1 (en) 1991-05-28 2002-06-11 Time Warner Entertainment Co. Lp Computer software delivery system
WO2000050285A1 (en) * 1999-02-22 2000-08-31 Siemens Aktiengesellschaft Method for transmitting data via a traction control which carries an electrical driving current for vehicles
US6810088B1 (en) 1999-02-22 2004-10-26 Siemens Aktiengesellschaft Method for transmitting data via a traction control which carries an electrical driving current for vehicles

Also Published As

Publication number Publication date
FR2280267A1 (en) 1976-02-20

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Legal Events

Date Code Title Description
CSNS Application of which complete specification have been accepted and published, but patent is not sealed