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MX9603971A - Metodo y aparato para difusion digital compatible am. - Google Patents

Metodo y aparato para difusion digital compatible am.

Info

Publication number
MX9603971A
MX9603971A MX9603971A MX9603971A MX9603971A MX 9603971 A MX9603971 A MX 9603971A MX 9603971 A MX9603971 A MX 9603971A MX 9603971 A MX9603971 A MX 9603971A MX 9603971 A MX9603971 A MX 9603971A
Authority
MX
Mexico
Prior art keywords
modulated
signal
broadcasting
frequency spectrum
carrier
Prior art date
Application number
MX9603971A
Other languages
English (en)
Inventor
Mark James Dapper
Michel Joseph Geile
Barry Walter Carlin
Original Assignee
Usa Digital Radio Partners L P
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 Usa Digital Radio Partners L P filed Critical Usa Digital Radio Partners L P
Publication of MX9603971A publication Critical patent/MX9603971A/es

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/28—Arrangements for simultaneous broadcast of plural pieces of information
    • H04H20/36—Arrangements for simultaneous broadcast of plural pieces of information for AM broadcasts
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/02—Channels characterised by the type of signal
    • H04L5/023—Multiplexing of multicarrier modulation signals, e.g. multi-user orthogonal frequency division multiple access [OFDMA]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H2201/00—Aspects of broadcast communication
    • H04H2201/10—Aspects of broadcast communication characterised by the type of broadcast system
    • H04H2201/18—Aspects of broadcast communication characterised by the type of broadcast system in band on channel [IBOC]
    • H04H2201/186—AM digital or hybrid
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H04L27/26035—Maintenance of orthogonality, e.g. for signals exchanged between cells or users, or by using covering codes or sequences

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Transmitters (AREA)
  • Circuits Of Receivers In General (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Stereo-Broadcasting Methods (AREA)
  • Amplitude Modulation (AREA)
  • Alarm Systems (AREA)

Abstract

La presente invencion se refiere a un método de difusion de radiofrecuencia, el método caracterizado porque comprende las etapas de: Modular en amplitud una primera señal portadora por una señal análoga para generar una primera señal de radiofrecuencia que tiene un primer espectro de frecuencia, generar una pluralidad de señales portadoras moduladas digitalmente para difusion, las señales que están dentro de un intervalo de frecuencia que abarca el espectro de frecuencia de la primera señal de radiofrecuencia, cada una de las señales portadoras moduladas digitalmente que son moduladas digitalmente por una porcion de una señal digital, en donde un primer grupo de las señales portadoras moduladas digitalmente traslapa el primer espectro de frecuencia y son moduladas en cuadratura con la primera señal portadora, y en donde el segundo y tercer grupos de las señales portadoras moduladas digitalmente están fuera del primer espectro de frecuencia y son moduladas ambas en fase y en cuadratura con la primera señal portadora; y difundir simultáneamente la primera señal de radiofrecuencia y la pluralidad de señales portadoras moduladas digitalmente.
MX9603971A 1994-03-07 1996-09-06 Metodo y aparato para difusion digital compatible am. MX9603971A (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/206,368 US5588022A (en) 1994-03-07 1994-03-07 Method and apparatus for AM compatible digital broadcasting

Publications (1)

Publication Number Publication Date
MX9603971A true MX9603971A (es) 1998-11-30

Family

ID=22766069

Family Applications (1)

Application Number Title Priority Date Filing Date
MX9603971A MX9603971A (es) 1994-03-07 1996-09-06 Metodo y aparato para difusion digital compatible am.

Country Status (15)

Country Link
US (1) US5588022A (es)
EP (1) EP0749650B1 (es)
JP (2) JP4269003B2 (es)
KR (1) KR100342286B1 (es)
CN (2) CN100358271C (es)
AT (1) ATE201540T1 (es)
AU (1) AU687198B2 (es)
BR (1) BR9507009A (es)
CA (1) CA2185003C (es)
DE (1) DE69521033T2 (es)
MX (1) MX9603971A (es)
NZ (1) NZ300094A (es)
RU (1) RU2140708C1 (es)
TW (1) TW256972B (es)
WO (1) WO1995024781A1 (es)

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Also Published As

Publication number Publication date
CN1496034A (zh) 2004-05-12
JP4269014B2 (ja) 2009-05-27
AU687198B2 (en) 1998-02-19
EP0749650B1 (en) 2001-05-23
EP0749650A1 (en) 1996-12-27
US5588022A (en) 1996-12-24
ATE201540T1 (de) 2001-06-15
KR100342286B1 (ko) 2002-11-29
CN100358271C (zh) 2007-12-26
JPH10500810A (ja) 1998-01-20
BR9507009A (pt) 1997-09-16
RU2140708C1 (ru) 1999-10-27
KR970701977A (ko) 1997-04-12
JP2008125088A (ja) 2008-05-29
CN1146835A (zh) 1997-04-02
CN1143463C (zh) 2004-03-24
WO1995024781A1 (en) 1995-09-14
AU2374595A (en) 1995-09-25
DE69521033D1 (de) 2001-06-28
DE69521033T2 (de) 2001-11-08
CA2185003C (en) 2005-01-04
NZ300094A (en) 1998-01-26
TW256972B (es) 1995-09-11
CA2185003A1 (en) 1995-09-14
JP4269003B2 (ja) 2009-05-27

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