BRPI0504407A - comunicação broadcast/multicast sincronizada - Google Patents

comunicação broadcast/multicast sincronizada

Info

Publication number
BRPI0504407A
BRPI0504407A BRPI0504407-3A BRPI0504407A BRPI0504407A BR PI0504407 A BRPI0504407 A BR PI0504407A BR PI0504407 A BRPI0504407 A BR PI0504407A BR PI0504407 A BRPI0504407 A BR PI0504407A
Authority
BR
Brazil
Prior art keywords
synchronized
broadcast
synchronized broadcast
same
multicast communication
Prior art date
Application number
BRPI0504407-3A
Other languages
English (en)
Inventor
Matthew S Grob
Peter J Black
Srikant Jayaraman
Paul E Jacobs
Original Assignee
Qualcomm 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 Qualcomm Inc filed Critical Qualcomm Inc
Publication of BRPI0504407A publication Critical patent/BRPI0504407A/pt

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • 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
    • H04L5/026—Multiplexing of multicarrier modulation signals using code division
    • 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
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/01—Equalisers
    • 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
    • H04L27/2605—Symbol extensions, e.g. Zero Tail, Unique Word [UW]
    • H04L27/2607—Cyclic extensions
    • 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
    • H04L27/2647—Arrangements specific to the receiver only

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Power Engineering (AREA)
  • Multimedia (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Small-Scale Networks (AREA)
  • Radio Relay Systems (AREA)

Abstract

"COMUNICAçãO BROADCAST/MULTICAST SINCRONIZADA". O broadcast sincronizado transmite um mesmo conteúdo de broadcast, usando uma mesma forma de onda a partir de múltiplos transmissores. Cada um dos transmissores aplica um mesmo código de espalhamento para as transmissões broadcast. Em um sistema de comunicação por espalhamento espectral possuindo um link direto multiplexado por divisão de tempo, uma transmissão por broadcast sincronizada é inserida em uma partição de broadcast. Uma modalidade emprega uma forma de onda de multiplexação por divisão de freqüência ortogonal (OFDM) para a irradiação sincronizada. Um receptor OFDM é então usado para processar a transmissão por broadcast sincronizada recebida. Uma modalidade alternativa implementa um código de ruído pseudo-aleatório (PN) para uso por múltiplos transmissores. Um equalizador é a seguir empregado para estimar a transmissão por broadcast sincronizada.
BRPI0504407-3A 2004-01-20 2005-01-20 comunicação broadcast/multicast sincronizada BRPI0504407A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US53795504P 2004-01-20 2004-01-20
PCT/US2005/001591 WO2005071867A2 (en) 2004-01-20 2005-01-20 Synchronized broadcast/multicast communication

Publications (1)

Publication Number Publication Date
BRPI0504407A true BRPI0504407A (pt) 2006-10-24

Family

ID=34807148

Family Applications (1)

Application Number Title Priority Date Filing Date
BRPI0504407-3A BRPI0504407A (pt) 2004-01-20 2005-01-20 comunicação broadcast/multicast sincronizada

Country Status (26)

Country Link
US (4) US8363697B2 (pt)
JP (4) JP4777907B2 (pt)
KR (3) KR101129205B1 (pt)
CN (4) CN102300162B (pt)
AU (2) AU2005207338B2 (pt)
BG (1) BG109346A (pt)
BR (1) BRPI0504407A (pt)
CA (1) CA2525239C (pt)
CZ (1) CZ2005704A3 (pt)
DE (1) DE602005022263D1 (pt)
DK (1) DK1658688T3 (pt)
EC (1) ECSP056176A (pt)
ES (2) ES2348415T3 (pt)
HU (1) HUE026306T2 (pt)
IL (2) IL171796A (pt)
MX (1) MXPA05012687A (pt)
NO (1) NO20055252L (pt)
NZ (3) NZ571456A (pt)
PL (1) PL380449A1 (pt)
PT (2) PT1658688E (pt)
RU (1) RU2379840C2 (pt)
TR (1) TR200504827T2 (pt)
TW (2) TWI367640B (pt)
UA (1) UA95437C2 (pt)
WO (1) WO2005071867A2 (pt)
ZA (1) ZA200509101B (pt)

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