BR0000988A - Médoto para operar um sistema sem fio de acesso múltiplo de espectro disperso baseado em multiplexagem de divisão de frequência ortogonal - Google Patents

Médoto para operar um sistema sem fio de acesso múltiplo de espectro disperso baseado em multiplexagem de divisão de frequência ortogonal

Info

Publication number
BR0000988A
BR0000988A BR0000988-1A BR0000988A BR0000988A BR 0000988 A BR0000988 A BR 0000988A BR 0000988 A BR0000988 A BR 0000988A BR 0000988 A BR0000988 A BR 0000988A
Authority
BR
Brazil
Prior art keywords
delta
adjacent
base station
cell
offset
Prior art date
Application number
BR0000988-1A
Other languages
English (en)
Inventor
Rajiv Laroia
Junyi Li
Michaela C Vanderveen
Original Assignee
Lucent Technologies 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 Lucent Technologies Inc filed Critical Lucent Technologies Inc
Publication of BR0000988A publication Critical patent/BR0000988A/pt

Links

Classifications

    • 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
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2628—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using code-division multiple access [CDMA] or spread spectrum multiple access [SSMA]
    • H04B7/2634—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using code-division multiple access [CDMA] or spread spectrum multiple access [SSMA] for channel frequency control

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Spectrometry And Color Measurement (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Feedback Control In General (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

<B>MéTODO PARA OPERAR UM SISTEMA SEM FIO DE ACESSO MúLTIPLO DE ESPECTRO DISPERSO BASEADO EM MULTIPLEXAGEM DE DIVISãO DE FREQuêNCIA ORTOGONAL<D> é revelado um sistema sem fio de acesso múltiplo de espectro disperso baseado em multiplexagem de divisão de freq³ência ortogonal (OFDM) usando deslocamento entre células e, em particular, o uso de deslocamento de tom e deslocamento de tempo. Mais especificamente, as freq³ências que definem o conjunto de tons de uma célula são deslocadas das freq³ências que definem o conjunto de tons de, pelo menos, uma célula adjacente. Em outras palavras, se uma primeira estação-base estiver usando tons F~ 1~, F~ 2~, ..., F~ N~ dentro de uma faixa de freq³ência, então, uma segunda estação-base adjacente à primeira estação-base usará tons F~ 1~+<30>f,F~ 2~+<30>f..., F~ N~+<30>f dentro da mesma faixa de freq³ência. Além disso, o sincronismo de símbolo da estação-base de uma célula pode ser deslocado do sincronismo de símbolo da estação-base da célula adjacente. Assim, se uma primeira estação-base iniciar símbolos sucessivos nos tempos T1, T2 e T3, então, uma segunda estação-base adjacente à primeira estação-base iniciará seus respectivos símbolos sucessivos correspondentes nos tempos T1+<30>t, T2+<30>t e T3+<30>t. Por exemplo, em um sistema celular com células em forma hexagonal, os conjuntos de tons de duas células adjacentes são deslocados em 1/3 do espaçamento entre os tons adjacentes e os sincronismos de símbolos de duas células adjacentes são deslocados em 1/3 de um período de símbolo. De modo vantajoso, a interferência intercelular é mais uniformemente distribuída dentre usuários em uma célula.
BR0000988-1A 1999-03-11 2000-03-01 Médoto para operar um sistema sem fio de acesso múltiplo de espectro disperso baseado em multiplexagem de divisão de frequência ortogonal BR0000988A (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US09/266,370 US6711120B1 (en) 1999-03-11 1999-03-11 Orthogonal frequency division multiplexing based spread spectrum multiple access

Publications (1)

Publication Number Publication Date
BR0000988A true BR0000988A (pt) 2000-10-17

Family

ID=23014287

Family Applications (1)

Application Number Title Priority Date Filing Date
BR0000988-1A BR0000988A (pt) 1999-03-11 2000-03-01 Médoto para operar um sistema sem fio de acesso múltiplo de espectro disperso baseado em multiplexagem de divisão de frequência ortogonal

Country Status (12)

Country Link
US (1) US6711120B1 (pt)
EP (1) EP1039684B1 (pt)
JP (1) JP3703003B2 (pt)
KR (1) KR100804854B1 (pt)
CN (1) CN1235358C (pt)
AT (1) ATE230533T1 (pt)
AU (1) AU770983B2 (pt)
BR (1) BR0000988A (pt)
CA (1) CA2298361C (pt)
DE (1) DE60001081T2 (pt)
ES (1) ES2189725T3 (pt)
ID (1) ID26302A (pt)

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Also Published As

Publication number Publication date
CN1235358C (zh) 2006-01-04
US6711120B1 (en) 2004-03-23
KR100804854B1 (ko) 2008-02-20
AU1956600A (en) 2000-09-14
ATE230533T1 (de) 2003-01-15
ES2189725T3 (es) 2003-07-16
EP1039684B1 (en) 2003-01-02
CA2298361C (en) 2005-06-07
EP1039684A1 (en) 2000-09-27
ID26302A (id) 2000-12-14
DE60001081T2 (de) 2003-10-09
DE60001081D1 (de) 2003-02-06
KR20000062825A (ko) 2000-10-25
CA2298361A1 (en) 2000-09-11
CN1267151A (zh) 2000-09-20
JP3703003B2 (ja) 2005-10-05
JP2000299681A (ja) 2000-10-24
AU770983B2 (en) 2004-03-11

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B08F Application dismissed because of non-payment of annual fees [chapter 8.6 patent gazette]

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B08K Patent lapsed as no evidence of payment of the annual fee has been furnished to inpi [chapter 8.11 patent gazette]

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B15K Others concerning applications: alteration of classification

Ipc: H04L 5/02 (2006.01)