ES478337A1 - Procedimiento y modulador para reducir la anchura de banda de una onda. - Google Patents

Procedimiento y modulador para reducir la anchura de banda de una onda.

Info

Publication number
ES478337A1
ES478337A1 ES478337A ES478337A ES478337A1 ES 478337 A1 ES478337 A1 ES 478337A1 ES 478337 A ES478337 A ES 478337A ES 478337 A ES478337 A ES 478337A ES 478337 A1 ES478337 A1 ES 478337A1
Authority
ES
Spain
Prior art keywords
amplitude
signal
carrier wave
frequency modulating
fsk
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
ES478337A
Other languages
English (en)
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.)
AT&T Corp
Original Assignee
Western Electric Co Inc
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 Western Electric Co Inc filed Critical Western Electric Co Inc
Publication of ES478337A1 publication Critical patent/ES478337A1/es
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
    • H04L27/12—Modulator circuits; Transmitter circuits
    • H04L27/122—Modulator circuits; Transmitter circuits using digital generation of carrier signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)

Abstract

Procedimiento y modulador para reducir la anchura de banda de una onda, modulada en frecuencia por una señal de entrada, caracterizado porque se modula la amplitud de la onda modulada en frecuencia de acuerdo con la amplitud de la señal de entrada, de modo que la amplitud y la frecuencia se modulen de una forma individual y simultáneamente por la misma señal de entrada; y porque se establece la relación de amplitud de onda mínima a amplitud de onda máxima dentro de una gama comprendida entre 0,6 y 0,9.
ES478337A 1978-03-06 1979-03-06 Procedimiento y modulador para reducir la anchura de banda de una onda. Expired ES478337A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/883,656 US4170764A (en) 1978-03-06 1978-03-06 Amplitude and frequency modulation system

Publications (1)

Publication Number Publication Date
ES478337A1 true ES478337A1 (es) 1979-05-16

Family

ID=25383050

Family Applications (1)

Application Number Title Priority Date Filing Date
ES478337A Expired ES478337A1 (es) 1978-03-06 1979-03-06 Procedimiento y modulador para reducir la anchura de banda de una onda.

Country Status (7)

Country Link
US (1) US4170764A (es)
EP (1) EP0004046B1 (es)
JP (1) JPH0219662B2 (es)
CA (1) CA1105575A (es)
DE (1) DE2963138D1 (es)
ES (1) ES478337A1 (es)
WO (1) WO1979000718A1 (es)

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US6694128B1 (en) 1998-08-18 2004-02-17 Parkervision, Inc. Frequency synthesizer using universal frequency translation technology
US6061551A (en) 1998-10-21 2000-05-09 Parkervision, Inc. Method and system for down-converting electromagnetic signals
US6091940A (en) 1998-10-21 2000-07-18 Parkervision, Inc. Method and system for frequency up-conversion
US7321735B1 (en) 1998-10-21 2008-01-22 Parkervision, Inc. Optical down-converter using universal frequency translation technology
US6542722B1 (en) 1998-10-21 2003-04-01 Parkervision, Inc. Method and system for frequency up-conversion with variety of transmitter configurations
US7295826B1 (en) 1998-10-21 2007-11-13 Parkervision, Inc. Integrated frequency translation and selectivity with gain control functionality, and applications thereof
US6813485B2 (en) 1998-10-21 2004-11-02 Parkervision, Inc. Method and system for down-converting and up-converting an electromagnetic signal, and transforms for same
US6049706A (en) * 1998-10-21 2000-04-11 Parkervision, Inc. Integrated frequency translation and selectivity
US6560301B1 (en) 1998-10-21 2003-05-06 Parkervision, Inc. Integrated frequency translation and selectivity with a variety of filter embodiments
US6370371B1 (en) 1998-10-21 2002-04-09 Parkervision, Inc. Applications of universal frequency translation
US7039372B1 (en) 1998-10-21 2006-05-02 Parkervision, Inc. Method and system for frequency up-conversion with modulation embodiments
US6061555A (en) * 1998-10-21 2000-05-09 Parkervision, Inc. Method and system for ensuring reception of a communications signal
US7236754B2 (en) 1999-08-23 2007-06-26 Parkervision, Inc. Method and system for frequency up-conversion
US6704549B1 (en) 1999-03-03 2004-03-09 Parkvision, Inc. Multi-mode, multi-band communication system
US7006805B1 (en) 1999-01-22 2006-02-28 Parker Vision, Inc. Aliasing communication system with multi-mode and multi-band functionality and embodiments thereof, such as the family radio service
US6704558B1 (en) 1999-01-22 2004-03-09 Parkervision, Inc. Image-reject down-converter and embodiments thereof, such as the family radio service
US6853690B1 (en) 1999-04-16 2005-02-08 Parkervision, Inc. Method, system and apparatus for balanced frequency up-conversion of a baseband signal and 4-phase receiver and transceiver embodiments
US6879817B1 (en) 1999-04-16 2005-04-12 Parkervision, Inc. DC offset, re-radiation, and I/Q solutions using universal frequency translation technology
US6873836B1 (en) 1999-03-03 2005-03-29 Parkervision, Inc. Universal platform module and methods and apparatuses relating thereto enabled by universal frequency translation technology
US7110435B1 (en) 1999-03-15 2006-09-19 Parkervision, Inc. Spread spectrum applications of universal frequency translation
US7693230B2 (en) 1999-04-16 2010-04-06 Parkervision, Inc. Apparatus and method of differential IQ frequency up-conversion
US7065162B1 (en) 1999-04-16 2006-06-20 Parkervision, Inc. Method and system for down-converting an electromagnetic signal, and transforms for same
US7110444B1 (en) 1999-08-04 2006-09-19 Parkervision, Inc. Wireless local area network (WLAN) using universal frequency translation technology including multi-phase embodiments and circuit implementations
US8295406B1 (en) 1999-08-04 2012-10-23 Parkervision, Inc. Universal platform module for a plurality of communication protocols
US7072390B1 (en) 1999-08-04 2006-07-04 Parkervision, Inc. Wireless local area network (WLAN) using universal frequency translation technology including multi-phase embodiments
US7054296B1 (en) 1999-08-04 2006-05-30 Parkervision, Inc. Wireless local area network (WLAN) technology and applications including techniques of universal frequency translation
US7082171B1 (en) 1999-11-24 2006-07-25 Parkervision, Inc. Phase shifting applications of universal frequency translation
US6963734B2 (en) 1999-12-22 2005-11-08 Parkervision, Inc. Differential frequency down-conversion using techniques of universal frequency translation technology
US7292835B2 (en) 2000-01-28 2007-11-06 Parkervision, Inc. Wireless and wired cable modem applications of universal frequency translation technology
US7010286B2 (en) 2000-04-14 2006-03-07 Parkervision, Inc. Apparatus, system, and method for down-converting and up-converting electromagnetic signals
US7554508B2 (en) 2000-06-09 2009-06-30 Parker Vision, Inc. Phased array antenna applications on universal frequency translation
US7454453B2 (en) 2000-11-14 2008-11-18 Parkervision, Inc. Methods, systems, and computer program products for parallel correlation and applications thereof
US7010559B2 (en) 2000-11-14 2006-03-07 Parkervision, Inc. Method and apparatus for a parallel correlator and applications thereof
US7072427B2 (en) 2001-11-09 2006-07-04 Parkervision, Inc. Method and apparatus for reducing DC offsets in a communication system
US7085335B2 (en) 2001-11-09 2006-08-01 Parkervision, Inc. Method and apparatus for reducing DC offsets in a communication system
WO2003062861A1 (en) * 2002-01-16 2003-07-31 Tagsys Australia Pty Ltd A system and method for communicating with electronic labels
US6975848B2 (en) 2002-06-04 2005-12-13 Parkervision, Inc. Method and apparatus for DC offset removal in a radio frequency communication channel
US7321640B2 (en) 2002-06-07 2008-01-22 Parkervision, Inc. Active polyphase inverter filter for quadrature signal generation
US7379883B2 (en) 2002-07-18 2008-05-27 Parkervision, Inc. Networking methods and systems
US7460584B2 (en) 2002-07-18 2008-12-02 Parkervision, Inc. Networking methods and systems
US8265191B2 (en) * 2006-04-19 2012-09-11 Zebra Enterprise Solutions Corp. Receiver for object locating and tracking systems and related methods
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EP2235967B1 (en) * 2007-12-19 2019-01-30 Falcon Nano, Inc. Common wave and sideband mitigation communication systems and methods for increasing communication speeds,spectral efficiency and enabling other benefits
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US3408572A (en) * 1965-07-06 1968-10-29 Digitronics Corp Controlled amplitude frequency shift signal generator
GB1125043A (en) * 1966-02-02 1968-08-28 Post Office Radio telegraph signal transmission
US3715474A (en) * 1967-12-26 1973-02-06 Ibm Color video recording and playback system
US3619503A (en) * 1969-11-18 1971-11-09 Int Communications Corp Phase and amplitude modulated modem
US3895316A (en) * 1973-08-29 1975-07-15 W P Instr Inc Complex tone modulation
JPS5242011A (en) * 1975-09-29 1977-04-01 Fuji Xerox Co Ltd Signal duplex transmission system

Also Published As

Publication number Publication date
JPS55500117A (es) 1980-02-28
DE2963138D1 (en) 1982-08-12
EP0004046B1 (en) 1982-06-23
EP0004046A1 (en) 1979-09-19
US4170764A (en) 1979-10-09
WO1979000718A1 (en) 1979-10-04
CA1105575A (en) 1981-07-21
JPH0219662B2 (es) 1990-05-02

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