GB529984A - Improvements in or relating to radio transmission systems employing pulse modulation - Google Patents

Improvements in or relating to radio transmission systems employing pulse modulation

Info

Publication number
GB529984A
GB529984A GB15921/39A GB1592139A GB529984A GB 529984 A GB529984 A GB 529984A GB 15921/39 A GB15921/39 A GB 15921/39A GB 1592139 A GB1592139 A GB 1592139A GB 529984 A GB529984 A GB 529984A
Authority
GB
United Kingdom
Prior art keywords
pulses
pulse
marking
channels
wave
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
GB15921/39A
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.)
Kolster Brandes Ltd
Original Assignee
Kolster Brandes Ltd
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 to NL135920D priority Critical patent/NL135920C/xx
Priority to BE441446D priority patent/BE441446A/xx
Application filed by Kolster Brandes Ltd filed Critical Kolster Brandes Ltd
Priority to GB15921/39A priority patent/GB529984A/en
Priority to US333945A priority patent/US2328944A/en
Priority to FR867319D priority patent/FR867319A/en
Publication of GB529984A publication Critical patent/GB529984A/en
Priority to ES176998A priority patent/ES176998A1/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K1/00—General methods for the preparation of peptides, i.e. processes for the organic chemical preparation of peptides or proteins of any length
    • C07K1/006—General methods for the preparation of peptides, i.e. processes for the organic chemical preparation of peptides or proteins of any length of peptides containing derivatised side chain amino acids
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K7/00—Modulating pulses with a continuously-variable modulating signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B14/00—Transmission systems not characterised by the medium used for transmission
    • H04B14/02—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Organic Chemistry (AREA)
  • Biophysics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biochemistry (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Genetics & Genomics (AREA)
  • Medicinal Chemistry (AREA)
  • Molecular Biology (AREA)
  • Proteomics, Peptides & Aminoacids (AREA)
  • Analytical Chemistry (AREA)
  • Transmitters (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

529,984. Duplex, multiplex 'and secret systems. KOLSTER-BRANDES, Ltd., and BEATTY, W. A. May 30, 1939, No. 15921. Drawings to Specification. [Class 40 (v)] In a wireless system in which the modulating signals comprise a train of pulses representing the variable edges of a series of pulses varied in duration in accordance with the amplitude of a sound or other signal wave as described in Specification 523,575, the complementary fixed edge or marking pulses required by the receiver to reproduce the original wave are separately transmitted on a different carrier frequency. In a multiplex system employing pulse modulation, all channels use the same pulse frequency; the pulse generators and receivers of the various channels are synchronized by the marking pulse transmitter, or the pulse generators may employ a common saw-toothed wave. The synchronizing pulses for the transmitters may be transmitted over wires in basic form or as a modulated carrier. In a two-way system, the marking pulses in one direction synchronize the pulse generator for the opposite direction of transmission. The marking pulses may also be time modulated to provide an additional channel, the fixed edges of such pulses being utilized at the receivers of other channels to derive synchronizing pulses. Further secrecy may be ensured by variation of the carrier frequencies. When the system includes television, the pulse generators may be synchronized by television synchronizing pulses. Specifications 524,671 and 527,904 also are referred to.
GB15921/39A 1939-05-30 1939-05-30 Improvements in or relating to radio transmission systems employing pulse modulation Expired GB529984A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
NL135920D NL135920C (en) 1939-05-30
BE441446D BE441446A (en) 1939-05-30
GB15921/39A GB529984A (en) 1939-05-30 1939-05-30 Improvements in or relating to radio transmission systems employing pulse modulation
US333945A US2328944A (en) 1939-05-30 1940-05-08 Transmission system employing pulse modulation
FR867319D FR867319A (en) 1939-05-30 1940-09-27 Pulse modulation systems or the like
ES176998A ES176998A1 (en) 1939-05-30 1947-02-28 IMPROVEMENTS IN OR RELATIVE TO RADIOTRANSMISSION SYSTEMS THAT USE IMPULSION MODULATION

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB15921/39A GB529984A (en) 1939-05-30 1939-05-30 Improvements in or relating to radio transmission systems employing pulse modulation

Publications (1)

Publication Number Publication Date
GB529984A true GB529984A (en) 1940-12-03

Family

ID=10067936

Family Applications (1)

Application Number Title Priority Date Filing Date
GB15921/39A Expired GB529984A (en) 1939-05-30 1939-05-30 Improvements in or relating to radio transmission systems employing pulse modulation

Country Status (6)

Country Link
US (1) US2328944A (en)
BE (1) BE441446A (en)
ES (1) ES176998A1 (en)
FR (1) FR867319A (en)
GB (1) GB529984A (en)
NL (1) NL135920C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2823385A (en) * 1954-08-16 1958-02-18 Parmelee Plastics Co Attaching structure for spectacle frame side shields

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2542700A (en) * 1942-02-20 1951-02-20 Rca Corp Pulse modulation system
US2721321A (en) * 1942-04-09 1955-10-18 Radar Inc Directional antenna array
US2428582A (en) * 1942-05-21 1947-10-07 Rca Corp Radio diversity transmitter
US2497958A (en) * 1942-05-21 1950-02-21 Rca Corp Communication system for ultrashort radio waves
US2447233A (en) * 1943-04-07 1948-08-17 Standard Telephones Cables Ltd Pulse time modulation multiplex receiver
BE472934A (en) * 1943-04-07
US2478920A (en) * 1943-08-04 1949-08-16 Rca Corp Pulse system
US2425314A (en) * 1943-09-16 1947-08-12 Rca Corp Pulse communication system
US2444445A (en) * 1943-11-10 1948-07-06 Sperry Corp Radio navigation system
US2595876A (en) * 1944-02-02 1952-05-06 Gen Electric Radio pulse-echo locating equipment
US2449819A (en) * 1944-05-29 1948-09-21 Rca Corp Multiplex radio communication
US2443958A (en) * 1944-09-23 1948-06-22 Rca Corp Modulation
US2495722A (en) * 1944-10-02 1950-01-31 Standard Telephones Cables Ltd Distance indicating system
US2645771A (en) * 1945-04-18 1953-07-14 Standard Telephones Cables Ltd Pulsed radio remote-control system
BE469840A (en) * 1945-04-30
GB620487A (en) * 1946-02-06 1949-03-25 William Joseph O Brien Improvements in or relating to radio navigation systems
US2611826A (en) * 1947-06-05 1952-09-23 Kalfaian Meguer Simultaneous amplitude modulation and phase modulation with economy in bandwidth
US2653184A (en) * 1948-01-03 1953-09-22 American Optical Corp Transmission of picture and sound on the same carrier
US2528140A (en) * 1948-06-08 1950-10-31 Hastings Instr Company Inc Navigational aid

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2823385A (en) * 1954-08-16 1958-02-18 Parmelee Plastics Co Attaching structure for spectacle frame side shields

Also Published As

Publication number Publication date
NL135920C (en)
BE441446A (en)
ES176998A1 (en) 1947-04-16
US2328944A (en) 1943-09-07
FR867319A (en) 1941-10-13

Similar Documents

Publication Publication Date Title
GB529984A (en) Improvements in or relating to radio transmission systems employing pulse modulation
GB528819A (en) Improvements in or relating to secret communication systems
GB550193A (en) Improvements in and relating to multiplex frequency-modulation systems
US2392546A (en) Pulse modulation receiver
US2541076A (en) Multichannel pulse communicating system
US2498678A (en) Multiplex electrical pulse communication system
GB638346A (en) Improvements relating to receiving systems for modulated electric pulses
GB1257308A (en)
GB541665A (en) Improvements relating to high frequency wave transmission systems
ES344425A1 (en) Transmission system
US2474244A (en) Amplitude modulated time modulated pulse system
GB597461A (en) Television transmitting systems
GB540185A (en) System of transmission of electrical waves
GB601129A (en) Improvements in or relating to electric multi-channel pulse communication systems
US2406790A (en) System for the electric transmission of sound and other waves
GB552276A (en) Improvements in television transmission
GB600955A (en) Improvements in or relating to electric pulse communication systems
GB604130A (en) Improvements in or relating to electric pulse communication systems
GB679901A (en) Improvements in or relating to keyed frequency modulation carrier wave communicationsystems
GB595138A (en) Improvements in television systems
GB555212A (en) Improvements in modulated carrier-wave communication systems
GB703247A (en) Improvements in or relating to electric pulse communication systems
ES8404593A1 (en) Television transmission method, transmitter and receiver with a plurality of sound channels.
GB668000A (en) Duplex signalling system for sound and facsimile
GB695353A (en) Improvements in or relating to radio signalling systems