USB504899I5 - - Google Patents

Info

Publication number
USB504899I5
USB504899I5 US50489943A USB504899I5 US B504899 I5 USB504899 I5 US B504899I5 US 50489943 A US50489943 A US 50489943A US B504899 I5 USB504899 I5 US B504899I5
Authority
US
United States
Prior art keywords
frequency
waves
modulators
signals
speech
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.)
Pending
Application number
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 filed Critical
Priority to US02/504,899 priority Critical patent/US3991273A/en
Publication of USB504899I5 publication Critical patent/USB504899I5/en
Application granted granted Critical
Publication of US3991273A publication Critical patent/US3991273A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K1/00—Secret communication
    • H04K1/04—Secret communication by frequency scrambling, i.e. by transposing or inverting parts of the frequency band or by inverting the whole band
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Computational Linguistics (AREA)
  • Quality & Reliability (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

1. In a secret telephone transmission system in which speech waves are analyzed into component speech-defining low frequency signals which are coded in stepped wave form, a group of frequency modulators of the same type and same average frequency, means to impress said signals of stepped wave form on the respective frequency modulators to produce a plurality of frequency modulated waves of the same average frequency, and means to translate said last waves into frequency modulated waves accurately positioned at different frequency levels comprising a separate amplitude modulator for shifting the frequency of each such frequency modulated wave, and means to supply to said amplitude modulators carrier waves of accurately spaced frequency comprising a source of base frequency waves of highly constant frequency and a harmonic generator for fixing the frequencies of said supplied carrier waves.
US02/504,899 1943-10-04 1943-10-04 Speech component coded multiplex carrier wave transmission Expired - Lifetime US3991273A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US02/504,899 US3991273A (en) 1943-10-04 1943-10-04 Speech component coded multiplex carrier wave transmission

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US02/504,899 US3991273A (en) 1943-10-04 1943-10-04 Speech component coded multiplex carrier wave transmission

Publications (2)

Publication Number Publication Date
USB504899I5 true USB504899I5 (en) 1976-03-09
US3991273A US3991273A (en) 1976-11-09

Family

ID=24008175

Family Applications (1)

Application Number Title Priority Date Filing Date
US02/504,899 Expired - Lifetime US3991273A (en) 1943-10-04 1943-10-04 Speech component coded multiplex carrier wave transmission

Country Status (1)

Country Link
US (1) US3991273A (en)

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8031129B2 (en) 2004-08-18 2011-10-04 Ruckus Wireless, Inc. Dual band dual polarization antenna array
US7965252B2 (en) 2004-08-18 2011-06-21 Ruckus Wireless, Inc. Dual polarization antenna array with increased wireless coverage
US7652632B2 (en) 2004-08-18 2010-01-26 Ruckus Wireless, Inc. Multiband omnidirectional planar antenna apparatus with selectable elements
US7696946B2 (en) 2004-08-18 2010-04-13 Ruckus Wireless, Inc. Reducing stray capacitance in antenna element switching
US7498996B2 (en) 2004-08-18 2009-03-03 Ruckus Wireless, Inc. Antennas with polarization diversity
US7362280B2 (en) 2004-08-18 2008-04-22 Ruckus Wireless, Inc. System and method for a minimized antenna apparatus with selectable elements
US7292198B2 (en) 2004-08-18 2007-11-06 Ruckus Wireless, Inc. System and method for an omnidirectional planar antenna apparatus with selectable elements
US7880683B2 (en) 2004-08-18 2011-02-01 Ruckus Wireless, Inc. Antennas with polarization diversity
US7193562B2 (en) 2004-11-22 2007-03-20 Ruckus Wireless, Inc. Circuit board having a peripheral antenna apparatus with selectable antenna elements
CN1934750B (en) 2004-11-22 2012-07-18 鲁库斯无线公司 Circuit board having a peripheral antenna apparatus with selectable antenna elements
US7358912B1 (en) 2005-06-24 2008-04-15 Ruckus Wireless, Inc. Coverage antenna apparatus with selectable horizontal and vertical polarization elements
US7893882B2 (en) 2007-01-08 2011-02-22 Ruckus Wireless, Inc. Pattern shaping of RF emission patterns
US7646343B2 (en) 2005-06-24 2010-01-12 Ruckus Wireless, Inc. Multiple-input multiple-output wireless antennas
US7639106B2 (en) 2006-04-28 2009-12-29 Ruckus Wireless, Inc. PIN diode network for multiband RF coupling
US8217843B2 (en) 2009-03-13 2012-07-10 Ruckus Wireless, Inc. Adjustment of radiation patterns utilizing a position sensor
US8698675B2 (en) 2009-05-12 2014-04-15 Ruckus Wireless, Inc. Mountable antenna elements for dual band antenna
US9407012B2 (en) 2010-09-21 2016-08-02 Ruckus Wireless, Inc. Antenna with dual polarization and mountable antenna elements
US8756668B2 (en) 2012-02-09 2014-06-17 Ruckus Wireless, Inc. Dynamic PSK for hotspots
US9634403B2 (en) 2012-02-14 2017-04-25 Ruckus Wireless, Inc. Radio frequency emission pattern shaping
US10186750B2 (en) 2012-02-14 2019-01-22 Arris Enterprises Llc Radio frequency antenna array with spacing element
US9092610B2 (en) 2012-04-04 2015-07-28 Ruckus Wireless, Inc. Key assignment for a brand
US9570799B2 (en) 2012-09-07 2017-02-14 Ruckus Wireless, Inc. Multiband monopole antenna apparatus with ground plane aperture
EP2974045A4 (en) 2013-03-15 2016-11-09 Ruckus Wireless Inc Low-band reflector for dual band directional antenna
US9716573B2 (en) 2014-06-13 2017-07-25 Futurewei Technologies, Inc. Aggregated touchless wireless fronthaul
US10027413B2 (en) 2015-06-18 2018-07-17 Futurewei Technologies, Inc. Cascaded waveform modulation with an embedded control signal for high-performance mobile fronthaul

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1447204A (en) * 1919-09-30 1923-03-06 American Telephone & Telegraph Plural modulation and demodulation circuits
US1565521A (en) * 1920-12-08 1925-12-15 American Telephone & Telegraph Secret-communication system
US1629685A (en) * 1920-02-28 1927-05-24 Rca Corp Wireless telephony
US1819508A (en) * 1927-08-11 1931-08-18 Rca Corp Communication by frequency variation
US2103847A (en) * 1928-10-02 1937-12-28 Rca Corp Signaling
US2233183A (en) * 1938-11-12 1941-02-25 Gen Electric Frequency modulation system
US2270385A (en) * 1938-10-10 1942-01-20 Hartford Nat Bank & Trust Co Multicarrier transmission system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1447204A (en) * 1919-09-30 1923-03-06 American Telephone & Telegraph Plural modulation and demodulation circuits
US1629685A (en) * 1920-02-28 1927-05-24 Rca Corp Wireless telephony
US1565521A (en) * 1920-12-08 1925-12-15 American Telephone & Telegraph Secret-communication system
US1819508A (en) * 1927-08-11 1931-08-18 Rca Corp Communication by frequency variation
US2103847A (en) * 1928-10-02 1937-12-28 Rca Corp Signaling
US2270385A (en) * 1938-10-10 1942-01-20 Hartford Nat Bank & Trust Co Multicarrier transmission system
US2233183A (en) * 1938-11-12 1941-02-25 Gen Electric Frequency modulation system

Also Published As

Publication number Publication date
US3991273A (en) 1976-11-09

Similar Documents

Publication Publication Date Title
USB504899I5 (en)
SE7705875L (en) MULTI-CHANNEL SYSTEM
GB591884A (en) Pulse communication systems
GB984795A (en) Transmitter for simulating single sideband signals
GB627324A (en) Multiplex communication system using a phase-modulated carrier
GB762935A (en) Frequency conversion circuits
GB913089A (en) Improvements in or relating to multi-channel electric wave signalling systems
CH307828A (en) Device for the amplitude modulation of an ultra-high frequency oscillation passing through a waveguide.
JPS5443406A (en) Nonlinear distortion compensating device for amplitude phase modulated wave
ES346810A1 (en) Single or double sideband suppressed carrier modulator
US2080459A (en) Modulating system
CH231617A (en) Device for the transmission of signals by means of a frequency-modulated carrier wave.
SU127298A1 (en) Multipath radio channel simulator
IE38356L (en) Frequency multiplex apparatus
CH242962A (en) Transmitter group for the transmission of oscillations modulated in frequency or phase.
JPS5616305A (en) Amplitude modulating circuit
CH246393A (en) Circuit for reducing the distortion occurring in the transmission of frequency or phase modulated vibrations.
ES178083A1 (en) IMPROVEMENTS IN OR RELATING TO ARRANGEMENTS TO MODULATE CONTINUOUS WAVES
GB522429A (en) Improvements in and relating to carrier wave signalling systems
GB880566A (en) Test set for testing radio navigation equipment
CA492671A (en) Circuit arrangements for generating frequency modulated oscillations
JPS5242011A (en) Signal duplex transmission system
ES353989A1 (en) A procedure to modulate a carrier current in amplitude without generating side bands. (Machine-translation by Google Translate, not legally binding)
CA481334A (en) Frequency modulated wave generator
AT324419B (en) FREQUENCY GENERATOR WITH REGEI LOOP FOR GENERATING CHANGING FREQUENCIES