BR9105767A - Aparelho de modulacao hibrido - Google Patents

Aparelho de modulacao hibrido

Info

Publication number
BR9105767A
BR9105767A BR919105767A BR9105767A BR9105767A BR 9105767 A BR9105767 A BR 9105767A BR 919105767 A BR919105767 A BR 919105767A BR 9105767 A BR9105767 A BR 9105767A BR 9105767 A BR9105767 A BR 9105767A
Authority
BR
Brazil
Prior art keywords
appliance
hybrid modulation
hybrid
modulation
modulation appliance
Prior art date
Application number
BR919105767A
Other languages
English (en)
Inventor
Stephen V Cahill
Steven F Gillig
Thomas J Walczak
Original Assignee
Motorola 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 Motorola Inc filed Critical Motorola Inc
Publication of BR9105767A publication Critical patent/BR9105767A/pt

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B14/00—Transmission systems not characterised by the medium used for transmission
    • H04B14/002—Transmission systems not characterised by the medium used for transmission characterised by the use of a carrier modulation
    • H04B14/006—Angle modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/20—Modulator circuits; Transmitter circuits
    • H04L27/2032—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner
    • H04L27/2053—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases
    • H04L27/206—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases using a pair of orthogonal carriers, e.g. quadrature carriers
    • H04L27/2067—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases using a pair of orthogonal carriers, e.g. quadrature carriers with more than two phase states
    • H04L27/2075—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases using a pair of orthogonal carriers, e.g. quadrature carriers with more than two phase states in which the data are represented by the change in carrier phase

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
BR919105767A 1990-05-21 1991-05-15 Aparelho de modulacao hibrido BR9105767A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/526,156 US5020076A (en) 1990-05-21 1990-05-21 Hybrid modulation apparatus
PCT/US1991/003385 WO1991018464A1 (en) 1990-05-21 1991-05-15 Hybrid modulation apparatus

Publications (1)

Publication Number Publication Date
BR9105767A true BR9105767A (pt) 1992-08-04

Family

ID=24096148

Family Applications (1)

Application Number Title Priority Date Filing Date
BR919105767A BR9105767A (pt) 1990-05-21 1991-05-15 Aparelho de modulacao hibrido

Country Status (6)

Country Link
US (1) US5020076A (pt)
AU (1) AU627660B2 (pt)
BR (1) BR9105767A (pt)
CA (1) CA2062980C (pt)
MX (1) MX170766B (pt)
WO (1) WO1991018464A1 (pt)

Families Citing this family (38)

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US5249302A (en) * 1987-10-09 1993-09-28 Motorola, Inc. Mixed-mode transceiver system
JP3015417B2 (ja) * 1990-07-09 2000-03-06 株式会社東芝 移動無線通信システムとその無線移動局装置
WO1992003892A1 (en) * 1990-08-24 1992-03-05 Motorola, Inc. Dual mode automatic gain control
US5187809A (en) * 1990-08-24 1993-02-16 Motorola, Inc. Dual mode automatic gain control
DE4193230C1 (de) * 1990-12-20 1997-10-30 Motorola Inc Sendeschaltung in einem Funktelefon mit einem Pegelsender
US5175871A (en) * 1991-08-08 1992-12-29 Ericsson/Ge Mobile Communication Holding Inc. Power amplifier for a cellular telephone
US5353311A (en) * 1992-01-09 1994-10-04 Nec Corporation Radio transmitter
US5260673A (en) * 1992-08-21 1993-11-09 Hughes Aircraft Company π/4 differential encoding for digital cellular mobile systems
JPH0685745A (ja) * 1992-09-02 1994-03-25 Toshiba Corp デュアルモード無線通信装置
US5343171A (en) * 1992-09-28 1994-08-30 Kabushiki Kaish Toshiba Circuit for improving carrier rejection in a balanced modulator
US5841816A (en) * 1992-10-22 1998-11-24 Ericsson Inc. Diversity Pi/4-DQPSK demodulation
US5727023A (en) * 1992-10-27 1998-03-10 Ericsson Inc. Apparatus for and method of speech digitizing
US5745523A (en) * 1992-10-27 1998-04-28 Ericsson Inc. Multi-mode signal processing
US5530722A (en) * 1992-10-27 1996-06-25 Ericsson Ge Mobile Communications Inc. Quadrature modulator with integrated distributed RC filters
US5867537A (en) * 1992-10-27 1999-02-02 Ericsson Inc. Balanced tranversal I,Q filters for quadrature modulators
US5423078A (en) * 1993-03-18 1995-06-06 Ericsson Ge Mobile Communications Inc. Dual mode power amplifier for analog and digital cellular telephones
US5392460A (en) * 1993-04-23 1995-02-21 Nokia Mobile Phones Ltd. Dual mode radiotelephone terminal selectively operable for frequency modulated or phase modulated operation
US5351016A (en) * 1993-05-28 1994-09-27 Ericsson Ge Mobile Communications Inc. Adaptively self-correcting modulation system and method
US5854808A (en) * 1993-09-14 1998-12-29 Pacific Communication Sciences Methods and apparatus for detecting the presence of a prescribed signal in a channel of a communications system
US5574750A (en) * 1993-09-14 1996-11-12 Pacific Communication Sciences, Inc. Methods and apparatus for detecting a cellular digital packet data (CDPD) carrier
FI103442B1 (fi) * 1993-09-24 1999-06-30 Nokia Telecommunications Oy Digitaalinen radiolinkkijärjestelmä ja radiolinkkilaite
CA2154825A1 (en) * 1994-09-09 1996-03-10 Lars H. Mucke Dual mode radiotelephone modulator
JP2950739B2 (ja) * 1994-11-11 1999-09-20 沖電気工業株式会社 デュアルモード送信装置
FI98330C (fi) 1994-12-15 1997-05-26 Nokia Mobile Phones Ltd UHF-syntesoija
US5854813A (en) * 1994-12-29 1998-12-29 Motorola, Inc. Multiple access up converter/modulator and method
DE19614979C2 (de) 1995-04-20 2001-05-17 Fujitsu Ltd Hochfrequenz-Sende-Empfangs-Vorrichtung zur Datenkommunikation
US5822704A (en) * 1996-01-05 1998-10-13 Nec Corporation Mobile radio unit for use in dual-mode cellular communications system
US5787362A (en) * 1996-07-08 1998-07-28 Nokia Mobile Phones Limited AM removal from FM signal generated by IQ modulator
US6546044B1 (en) 1996-10-11 2003-04-08 Ericsson Inc. Dual-mode radiotelephone apparatus for digital or analog modulation
US6292511B1 (en) * 1998-10-02 2001-09-18 Usa Digital Radio Partners, Lp Method for equalization of complementary carriers in an AM compatible digital audio broadcast system
US6295317B1 (en) * 1998-10-02 2001-09-25 Usa Digital Radio Partners, Lp Method and apparatus for demodulating and equalizing an AM compatible digital audio broadcast signal
US6259893B1 (en) * 1998-11-03 2001-07-10 Ibiquity Digital Corporation Method and apparatus for reduction of FM interference for FM in-band on-channel digital audio broadcasting system
US6721337B1 (en) 1999-08-24 2004-04-13 Ibiquity Digital Corporation Method and apparatus for transmission and reception of compressed audio frames with prioritized messages for digital audio broadcasting
US6549544B1 (en) 1999-11-10 2003-04-15 Ibiquity Digital Corporation Method and apparatus for transmission and reception of FM in-band on-channel digital audio broadcasting
US6523147B1 (en) 1999-11-11 2003-02-18 Ibiquity Digital Corporation Method and apparatus for forward error correction coding for an AM in-band on-channel digital audio broadcasting system
US6671337B1 (en) 2000-10-25 2003-12-30 Koninklijke Philips Electronics N.V. Carrier modulator for use in a transmitter or transceiver
FR2820265B1 (fr) * 2001-01-30 2003-05-16 Canon Kk Dispositifs d'emission et de reception numeriques sans fil a faible cout
US8825037B2 (en) 2009-12-22 2014-09-02 Starkey Laboratories, Inc. FM radio system for digital and analog communications for hearing assistance devices

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3938155A (en) * 1974-07-15 1976-02-10 Wilcox Electric, Inc. High stability modulator for instrument landing systems
US4131849A (en) * 1976-10-21 1978-12-26 Motorola, Inc. Two-way mobile radio voice/data shared communications system
NL7709917A (nl) * 1977-09-09 1979-03-13 Philips Nv Systeem voor datatransmissie met behulp van een hoekgemoduleerde draaggolf van constante amplitude.
US4418416A (en) * 1981-04-06 1983-11-29 Bell Telephone Laboratories, Incorporated Frequency modulation transmitter for voice or data
US4481489A (en) * 1981-07-02 1984-11-06 Motorola Inc. Binary signal modulating circuitry for frequency modulated transmitters
US4608699A (en) * 1982-12-27 1986-08-26 Motorola, Inc. Simulcast transmission system
NL8402319A (nl) * 1984-07-23 1986-02-17 Philips Nv Inrichting voor het genereren van een hoekgemoduleerd draaggolfsignaal van constante amplitude in responsie op datasignalen.
US4748685A (en) * 1986-10-10 1988-05-31 Motorola, Inc. Mobile radio communications system

Also Published As

Publication number Publication date
AU7890091A (en) 1991-12-10
US5020076A (en) 1991-05-28
CA2062980C (en) 1996-10-22
CA2062980A1 (en) 1991-11-22
MX170766B (es) 1993-09-13
WO1991018464A1 (en) 1991-11-28
AU627660B2 (en) 1992-08-27

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Legal Events

Date Code Title Description
FB19 Grant procedure suspended (art. 19)
FA9 Application deemed withdrawn - failure to comply with requirements