BR0012541A - Cancelamento de interferência de múltiplo acesso cdma utilizando estimativa de sinal - Google Patents
Cancelamento de interferência de múltiplo acesso cdma utilizando estimativa de sinalInfo
- 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
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)
- Radar Systems Or Details Thereof (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
- Monitoring And Testing Of Transmission In General (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.
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) | EP2224604B1 (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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US6404760B1 (en) * | 1999-07-19 | 2002-06-11 | Qualcomm Incorporated | CDMA multiple access interference cancellation using signal estimation |
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1999
- 1999-07-19 US US09/356,610 patent/US6404760B1/en not_active Expired - Lifetime
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2000
- 2000-07-18 DK DK00948765T patent/DK1201042T3/da active
- 2000-07-18 ES ES00948765T patent/ES2241627T3/es not_active Expired - Lifetime
- 2000-07-18 EP EP10157197.4A patent/EP2224604B1/en not_active Expired - Lifetime
- 2000-07-18 KR KR1020027000786A patent/KR100784739B1/ko active IP Right Grant
- 2000-07-18 EP EP00948765A patent/EP1201042B1/en not_active Expired - Lifetime
- 2000-07-18 EP EP03026464.2A patent/EP1432134B1/en not_active Expired - Lifetime
- 2000-07-18 PT PT00948765T patent/PT1201042E/pt unknown
- 2000-07-18 WO PCT/US2000/019604 patent/WO2001006664A2/en active IP Right Grant
- 2000-07-18 AT AT00948765T patent/ATE293308T1/de not_active IP Right Cessation
- 2000-07-18 JP JP2001511000A patent/JP4668490B2/ja not_active Expired - Lifetime
- 2000-07-18 DE DE60019429T patent/DE60019429T2/de not_active Expired - Lifetime
- 2000-07-18 BR BR0012541-5A patent/BR0012541A/pt not_active IP Right Cessation
- 2000-07-18 CN CNB008130396A patent/CN1182659C/zh not_active Expired - Lifetime
- 2000-07-18 AU AU62217/00A patent/AU6221700A/en not_active Abandoned
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2003
- 2003-01-03 HK HK03100044.3A patent/HK1047832B/zh not_active IP Right Cessation
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2005
- 2005-07-08 CY CY20051100835T patent/CY1107676T1/el unknown
Also Published As
Publication number | Publication date |
---|---|
CN1182659C (zh) | 2004-12-29 |
JP2003505915A (ja) | 2003-02-12 |
DE60019429D1 (de) | 2005-05-19 |
DE60019429T2 (de) | 2006-03-09 |
WO2001006664A2 (en) | 2001-01-25 |
KR100784739B1 (ko) | 2007-12-13 |
EP1201042B1 (en) | 2005-04-13 |
PT1201042E (pt) | 2005-06-30 |
EP1201042A2 (en) | 2002-05-02 |
EP1432134B1 (en) | 2013-06-19 |
HK1047832A1 (en) | 2003-03-07 |
WO2001006664A3 (en) | 2001-05-17 |
ATE293308T1 (de) | 2005-04-15 |
US6404760B1 (en) | 2002-06-11 |
DK1201042T3 (da) | 2005-06-20 |
CN1375131A (zh) | 2002-10-16 |
JP4668490B2 (ja) | 2011-04-13 |
AU6221700A (en) | 2001-02-05 |
EP2224604B1 (en) | 2013-08-21 |
CY1107676T1 (el) | 2013-04-18 |
ES2241627T3 (es) | 2005-11-01 |
EP1432134A3 (en) | 2009-04-15 |
EP1432134A2 (en) | 2004-06-23 |
HK1047832B (zh) | 2005-07-29 |
EP2224604A1 (en) | 2010-09-01 |
KR20020011457A (ko) | 2002-02-08 |
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