DE542163C - Procedure to eliminate annoying broadening of characters in shortwave telegraphy - Google Patents

Procedure to eliminate annoying broadening of characters in shortwave telegraphy

Info

Publication number
DE542163C
DE542163C DET37324D DET0037324D DE542163C DE 542163 C DE542163 C DE 542163C DE T37324 D DET37324 D DE T37324D DE T0037324 D DET0037324 D DE T0037324D DE 542163 C DE542163 C DE 542163C
Authority
DE
Germany
Prior art keywords
telegraphy
characters
shortwave
broadening
procedure
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
DET37324D
Other languages
German (de)
Inventor
Dr Wilhelm Runge
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.)
Telefunken AG
Original Assignee
Telefunken AG
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
Priority claimed from DET37231D external-priority patent/DE537382C/en
Application filed by Telefunken AG filed Critical Telefunken AG
Priority to DET37324D priority Critical patent/DE542163C/en
Priority to DE1930538924D priority patent/DE538924C/en
Priority to GB19250/30A priority patent/GB347956A/en
Priority to GB19388/30A priority patent/GB348937A/en
Priority to US487973A priority patent/US1914898A/en
Application granted granted Critical
Publication of DE542163C publication Critical patent/DE542163C/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
    • H04L27/16—Frequency regulation arrangements
    • 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
    • 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
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/00095—Systems or arrangements for the transmission of the picture signal
    • H04N1/00103—Systems or arrangements for the transmission of the picture signal specially adapted for radio transmission, e.g. via satellites

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Transmitters (AREA)
  • Radio Relay Systems (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
  • Television Systems (AREA)

Description

Verfahren zur Beseitigung störender Zeichenverbreiterung bei Kurzwellentelegraphie Im Hauptpatent 537 382 wird das Verfahren geschützt, Anfang und Ende des zu übertragenden Zeichens durch gegen die Zeichendauer kurze Impulse von verschiedener Frequenz auszudrücken. Die größte übermittlungsgeschwindigkeit ist dann dadurch begrenzt, daß zwei Zeichen der gleichen Frequenz den zeitlichen Abstand nicht unterschreiten dürfen, der durch die Dauer der Nachhall- oder Verbreiterungserscheinungen gegeben ist.Procedure for eliminating disruptive broadening of characters in shortwave telegraphy The main patent 537 382 protects the process, the beginning and the end of the transfer To express the character by short impulses of different frequency against the character duration. The maximum transmission speed is then limited by the fact that two characters of the same frequency must not fall below the time interval that is due to the duration of the reverberation or spreading phenomena is given.

Erfindungsgemäß wird nun die mögliche Übermittlungsgeschwindigkeit noch weiter gesteigert, wenn man den Einsatz des ersten Zeichens durch einen Impuls mit der Frequenz f1, den Schluß des ersten Zeichens mit der Frequenz /2, den Einsatz des zweiten Zeichens mit der Frequenz/3, den Schluß des zweiten Zeichens mit der Frequenz f4 ausdrückt, beim dritten Zeichen wieder f1 und f2 benutzt und so fort. In der durch die Nachhalldauer gegebenen Zeit kann man dann nicht nur ein, sondern zwei Zeichen befördern.According to the invention, the possible transmission speed is now Enhanced even further if you use the first character through an impulse with the frequency f1, the end of the first character with the frequency / 2, the use of the second character with the frequency / 3, the end of the second character with the Expresses frequency f4, uses f1 and f2 again for the third character, and so on. In the time given by the reverberation duration, you can then not only have one, but one convey two characters.

Durch weitere Steigerung der Zahl der benutzten Frequenzen läßt sich die übermittlungsgeschwindigkeit entsprechend erhöhen.By further increasing the number of frequencies used, increase the transmission speed accordingly.

Claims (2)

:PATENTANSPRÜcHr: i. Verfahren zur Beseitigung störender Zeichenverbreiterung bei Kurzwellentelegraphie, insbesondere bei Schnelltelegraphie und Bildübertragung gemäß Patent 537 382 (Anspruch 6), dadurch gekennzeichnet, daß mehr als zwei Frequenzen benutzt werden, um Anfang und Ende der zu übermittelnden Zeichen auszudrücken. : PATENT CLAIM: i. Procedure for eliminating annoying character broadening in the case of shortwave telegraphy, especially in the case of high-speed telegraphy and image transmission according to patent 537 382 (claim 6), characterized in that more than two frequencies can be used to express the beginning and end of the characters to be transmitted. 2. Verfahren nach Anspruch i, dadurch gekennzeichnet, daß eine gerade Anzahl von Frequenzen verwandt wird, von denen die einen stets den Anfang, die anderen stets das Ende -eines Zeichens übermitteln.2. Method according to Claim i, characterized in that an even number of frequencies is used, of which some always the beginning, others always the end -transmit a character.
DET37324D 1929-07-06 1929-07-26 Procedure to eliminate annoying broadening of characters in shortwave telegraphy Expired DE542163C (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DET37324D DE542163C (en) 1929-07-06 1929-07-26 Procedure to eliminate annoying broadening of characters in shortwave telegraphy
DE1930538924D DE538924C (en) 1929-07-06 1930-02-27 Circuit for eliminating annoying character broadening in shortwave telegraphy
GB19250/30A GB347956A (en) 1929-07-06 1930-06-24 Improvements in or relating to radio signalling systems
GB19388/30A GB348937A (en) 1929-07-06 1930-06-25 Improvements in or relating to radio signalling systems
US487973A US1914898A (en) 1929-07-06 1930-10-11 Method of transmitting telegrams and pictures on short waves

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DET37231D DE537382C (en) 1929-07-06 1929-07-06 Procedure to eliminate annoying broadening of characters in shortwave telegraphy
DET37324D DE542163C (en) 1929-07-06 1929-07-26 Procedure to eliminate annoying broadening of characters in shortwave telegraphy

Publications (1)

Publication Number Publication Date
DE542163C true DE542163C (en) 1935-02-08

Family

ID=26000411

Family Applications (1)

Application Number Title Priority Date Filing Date
DET37324D Expired DE542163C (en) 1929-07-06 1929-07-26 Procedure to eliminate annoying broadening of characters in shortwave telegraphy

Country Status (3)

Country Link
US (1) US1914898A (en)
DE (1) DE542163C (en)
GB (2) GB347956A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2614210A (en) * 1944-05-18 1952-10-14 Rca Corp Pulsed radio signaling
US2486511A (en) * 1945-10-31 1949-11-01 Rca Corp Apparatus for receiving facsimile signals

Also Published As

Publication number Publication date
US1914898A (en) 1933-06-20
GB348937A (en) 1931-05-21
GB347956A (en) 1931-05-07

Similar Documents

Publication Publication Date Title
DE542163C (en) Procedure to eliminate annoying broadening of characters in shortwave telegraphy
DE2040339C3 (en) System for coding and decoding signals
DE2008560C3 (en) Message transmission system using pulse code modulation and pulse compression on the receiver side
DE2417654A1 (en) ARRANGEMENT FOR CIRCULATING DATA SIGNALS
DE1591067A1 (en) Selective Calling Method and Apparatus
DE2848945C3 (en) Device for transmitting stochastic information
DE2516001A1 (en) METHOD FOR IMPROVING THE DIRECTIONAL CHARACTERISTICS OF A SOUNDER RECEIVER BASE AND DEVICES FOR EXECUTING THIS METHOD
DE732279C (en) Arrangement for producing the line pulses for the interlace method
DE893510C (en) Runtime chain for pulses
DE413937C (en) Tubular cable
DE1537326A1 (en) Non-linear frequency discriminator
DE2712847A1 (en) VOICE PROTECTED FREQUENCY SELECTIVE SIGN RECEIVER
DE425403C (en) Device for determining the direction of wave-like processes, especially sound waves
AT157654B (en) Production of synchronous pulses for television broadcasts using the interlace method.
DE920368C (en) Method for securing the transmission of message pulse groups
DE455131C (en) Card funnel for time control devices
DE879903C (en) ampoule
DE414271C (en) Secretion extractor
DE1216918B (en) Method for receiving frequency-shift keyed data characters
DE669789C (en) Process for the selective separation of ultrashort wave oscillations from long wave disturbance oscillations
DE859759C (en) Single sideband multiple carrier stream message transmission system
DE1424718C (en) Message transmission system with a data processing center and several sub-centers
DE1812453C3 (en) Circuit to differentiate between Vmp \ i \ sio \ 9eT> vnteischteöYiclnet frequency
AT125956B (en) Device for locking shafts after a certain number of revolutions.
DE871622C (en) Teletypewriter