BR0012541A - Cancelamento de interferência de múltiplo acesso cdma utilizando estimativa de sinal - Google Patents

Cancelamento de interferência de múltiplo acesso cdma utilizando estimativa de sinal

Info

Publication number
BR0012541A
BR0012541A BR0012541-5A BR0012541A BR0012541A BR 0012541 A BR0012541 A BR 0012541A BR 0012541 A BR0012541 A BR 0012541A BR 0012541 A BR0012541 A BR 0012541A
Authority
BR
Brazil
Prior art keywords
replica
cancellation
signal
strongest signal
strongest
Prior art date
Application number
BR0012541-5A
Other languages
English (en)
Inventor
Jack Holtzman
Dilip G Warrier
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 BR0012541A publication Critical patent/BR0012541A/pt

Links

Classifications

    • 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
    • H04B1/7097—Interference-related aspects
    • H04B1/7103—Interference-related aspects the interference being multiple access interference
    • 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
    • H04B1/7097—Interference-related aspects
    • H04B1/7103—Interference-related aspects the interference being multiple access interference
    • H04B1/7107—Subtractive interference cancellation
    • 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
    • H04B1/7097—Interference-related aspects
    • H04B1/7103—Interference-related aspects the interference being multiple access interference
    • H04B1/7107—Subtractive interference cancellation
    • H04B1/71072—Successive interference cancellation
    • 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
    • H04B1/7097—Interference-related aspects
    • H04B1/7103—Interference-related aspects the interference being multiple access interference
    • H04B1/7107—Subtractive interference cancellation
    • H04B2001/71077—Partial interference cancellation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2201/00—Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
    • H04B2201/69—Orthogonal indexing scheme relating to spread spectrum techniques in general
    • H04B2201/707—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
    • H04B2201/70701—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation featuring pilot assisted reception

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Noise Elimination (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)

Abstract

"CANCELAMENTO DE INTERFERêNCIA DE MúLTIPLO ACESSO CDMA UTILIZANDO ESTIMATIVA DE SINAL". Vários métodos e aparelhos correspondentes reduzem a interferência de múltiplo acesso em sistemas de comunicação de múltiplo acesso por divisão de código (100) através de técnicas de cancelamento de interferência sucessiva. Uma estimativa da confiabilidade do cancelamento de um sinal interferente mais forte é formada a partir da análise de um sinal piloto associado ao sinal mais forte. A estimativa é usada para obter um peso que é multiplicado por uma réplica do sinal mais forte para fornecer uma réplica ponderada. A réplica ponderada é subtraída de uma versão retardada do canal recebido. Em conseq³ência, o cancelamento de interferência é vigorosamente implementado quando a réplica do sinal mais forte for, com mais probabilidade, precisa e não é vigorosamente implementado quando a réplica do sinal mais forte não for, com mais probabilidade, precisa. Isto evita combinar uma réplica do sinal mais forte com o canal recebido quando, com mais probabilidade, for melhor a réplica contribuir com interferência adicional do que reduzi-las.
BR0012541-5A 1999-07-19 2000-07-18 Cancelamento de interferência de múltiplo acesso cdma utilizando estimativa de sinal BR0012541A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/356,610 US6404760B1 (en) 1999-07-19 1999-07-19 CDMA multiple access interference cancellation using signal estimation
PCT/US2000/019604 WO2001006664A2 (en) 1999-07-19 2000-07-18 Cdma multiple access interference cancellation using signal estimation

Publications (1)

Publication Number Publication Date
BR0012541A true BR0012541A (pt) 2002-11-26

Family

ID=23402181

Family Applications (1)

Application Number Title Priority Date Filing Date
BR0012541-5A BR0012541A (pt) 1999-07-19 2000-07-18 Cancelamento de interferência de múltiplo acesso cdma utilizando estimativa de sinal

Country Status (15)

Country Link
US (1) US6404760B1 (pt)
EP (3) EP1432134B1 (pt)
JP (1) JP4668490B2 (pt)
KR (1) KR100784739B1 (pt)
CN (1) CN1182659C (pt)
AT (1) ATE293308T1 (pt)
AU (1) AU6221700A (pt)
BR (1) BR0012541A (pt)
CY (1) CY1107676T1 (pt)
DE (1) DE60019429T2 (pt)
DK (1) DK1201042T3 (pt)
ES (1) ES2241627T3 (pt)
HK (1) HK1047832B (pt)
PT (1) PT1201042E (pt)
WO (1) WO2001006664A2 (pt)

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Also Published As

Publication number Publication date
EP2224604A1 (en) 2010-09-01
EP2224604B1 (en) 2013-08-21
ATE293308T1 (de) 2005-04-15
EP1432134A3 (en) 2009-04-15
ES2241627T3 (es) 2005-11-01
CN1375131A (zh) 2002-10-16
KR20020011457A (ko) 2002-02-08
EP1432134B1 (en) 2013-06-19
PT1201042E (pt) 2005-06-30
JP2003505915A (ja) 2003-02-12
EP1432134A2 (en) 2004-06-23
DK1201042T3 (da) 2005-06-20
EP1201042A2 (en) 2002-05-02
WO2001006664A3 (en) 2001-05-17
DE60019429T2 (de) 2006-03-09
DE60019429D1 (de) 2005-05-19
WO2001006664A2 (en) 2001-01-25
JP4668490B2 (ja) 2011-04-13
EP1201042B1 (en) 2005-04-13
US6404760B1 (en) 2002-06-11
KR100784739B1 (ko) 2007-12-13
AU6221700A (en) 2001-02-05
CN1182659C (zh) 2004-12-29
CY1107676T1 (el) 2013-04-18
HK1047832A1 (en) 2003-03-07
HK1047832B (zh) 2005-07-29

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