BR9901219A - Sistemas de antenas distanciadas. - Google Patents
Sistemas de antenas distanciadas.Info
- Publication number
- BR9901219A BR9901219A BR9901219-7A BR9901219A BR9901219A BR 9901219 A BR9901219 A BR 9901219A BR 9901219 A BR9901219 A BR 9901219A BR 9901219 A BR9901219 A BR 9901219A
- Authority
- BR
- Brazil
- Prior art keywords
- branch
- distances
- level
- value
- levels
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
- H04B7/0842—Weighted combining
- H04B7/0845—Weighted combining per branch equalization, e.g. by an FIR-filter or RAKE receiver per antenna branch
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/28—Combinations of substantially independent non-interacting antenna units or systems
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
- H01Q3/2605—Array of radiating elements provided with a feedback control over the element weights, e.g. adaptive arrays
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
- H01Q3/2682—Time delay steered arrays
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Radio Transmission System (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
<B>"SISTEMA DE ANTENAS DISTANCIADAS"<D>. Com a finalidade de reduzir o efeito de propagação por multévios, antenas distanciadas foram propostas nas quais cada antena em um conjunto tem uma linha de retardo com derivação de ramos respectivo na qual os sinais de saída de derivação são ponderados e somados. As somas necessitam portanto de ser combinadas de um modo que melhore a razão entre sinal e ruído. é revelado um sistema de antenas de diversidade no qual os pesos de ramos W~ 15~ e W~ MS~ são determinados para cada ramo por: comparação da parte real dos sinais de saída de derivação somados Y~ 1~ a Y~ m~ para o ramo com um nível estabelecido; atribuição de um valor simbólico de zero lógico àqueles sinais de saída de derivação de ramo somados que recaem em um lado do nível estabelecido e atribuição de um valor simbólico de um lógico àqueles sinais de saída de derivação de ramo somados que recaem no outro lado do nível estabelecido; cálculo da média dos níveis daqueles aos quais foi atribuído o valor de zero lógico e da média dos níveis daqueles sinais aos quais foi atribuído o valor de um lógico; cálculo das distâncias entre o nível de cada sinal ao qual foi atribuído o valor de zero lógico e a respectiva média, e entre o nível de cada sinal ao qual foi atribuído o valor de um lógico e a respectiva média; cálculo da soma das distâncias a partir das médias; cálculos das distâncias entre os níveis de todos os sinais e o nível estabelecido; cálculo da soma das distâncias entre os níveis de todos os sinais e o nível estabelecido; cálculo da razão entre a soma das distâncias a partir das médias e a soma das distâncias entre os níveis de todos os símbolos e o nível estabelecido; ajuste do peso do ramo W~ 15~ a W~ MS~ dependendo do inverso da razão.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP98302654A EP0948081A1 (en) | 1998-04-03 | 1998-04-03 | Diversity antenna system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BR9901219A true BR9901219A (pt) | 2000-02-01 |
Family
ID=8234760
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BR9901219-7A BR9901219A (pt) | 1998-04-03 | 1999-03-30 | Sistemas de antenas distanciadas. |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US6104768A (pt) |
| EP (1) | EP0948081A1 (pt) |
| JP (1) | JP3634661B2 (pt) |
| KR (1) | KR100337249B1 (pt) |
| CN (1) | CN1235388A (pt) |
| AU (1) | AU721254B2 (pt) |
| BR (1) | BR9901219A (pt) |
| CA (1) | CA2265208C (pt) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100322021B1 (ko) * | 1999-03-22 | 2002-03-20 | 윤종용 | 다이버시티 안테나간의 이격거리 결정방법 |
| CN1780272B (zh) * | 2004-11-19 | 2011-01-05 | 上海宣普实业有限公司 | 路径合并和相关的方法 |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2229580B (en) * | 1989-02-08 | 1993-07-21 | Stc Plc | Adaptive array processor |
| DE69129768T2 (de) * | 1990-03-30 | 1999-02-25 | Nec Corp., Tokio/Tokyo | Störungsunempfindlicher Raumdiversityempfänger |
| DE4018044A1 (de) * | 1990-06-06 | 1991-12-12 | Philips Patentverwaltung | Empfaenger mit mindestens zwei empfangszweigen |
| JP2982504B2 (ja) * | 1992-07-31 | 1999-11-22 | 日本電気株式会社 | 適応受信機 |
| JP2780576B2 (ja) * | 1992-08-05 | 1998-07-30 | 日本電気株式会社 | 干渉波除去装置 |
| US5481570A (en) * | 1993-10-20 | 1996-01-02 | At&T Corp. | Block radio and adaptive arrays for wireless systems |
| US5724390A (en) * | 1994-03-02 | 1998-03-03 | Lucent Technologies Inc. | MLSE before derotation and after derotation |
| US5550872A (en) * | 1994-10-24 | 1996-08-27 | Motorola, Inc. | Method and apparatus for Fast Fourier Transform based maximal ratio combining |
| JPH08298483A (ja) * | 1995-04-27 | 1996-11-12 | Matsushita Electric Ind Co Ltd | ダイバーシチ受信装置 |
| AT408933B (de) * | 1996-05-20 | 2002-04-25 | Josef Dipl Ing Fuhl | Verfahren und vorrichtung zur erhöhung der teilnehmerkapazität von zellularen mobilfunknetzen |
-
1998
- 1998-04-03 EP EP98302654A patent/EP0948081A1/en not_active Withdrawn
-
1999
- 1999-03-09 CA CA002265208A patent/CA2265208C/en not_active Expired - Fee Related
- 1999-03-30 US US09/281,547 patent/US6104768A/en not_active Expired - Fee Related
- 1999-03-30 BR BR9901219-7A patent/BR9901219A/pt not_active IP Right Cessation
- 1999-04-01 KR KR1019990011416A patent/KR100337249B1/ko not_active IP Right Cessation
- 1999-04-01 CN CN99104705A patent/CN1235388A/zh active Pending
- 1999-04-01 AU AU23539/99A patent/AU721254B2/en not_active Ceased
- 1999-04-02 JP JP09562099A patent/JP3634661B2/ja not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP3634661B2 (ja) | 2005-03-30 |
| AU721254B2 (en) | 2000-06-29 |
| KR100337249B1 (ko) | 2002-05-17 |
| EP0948081A1 (en) | 1999-10-06 |
| AU2353999A (en) | 1999-10-14 |
| US6104768A (en) | 2000-08-15 |
| CA2265208A1 (en) | 1999-10-03 |
| CN1235388A (zh) | 1999-11-17 |
| CA2265208C (en) | 2001-05-08 |
| JP2000013291A (ja) | 2000-01-14 |
| KR19990082829A (ko) | 1999-11-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| B08F | Application dismissed because of non-payment of annual fees [chapter 8.6 patent gazette] |
Free format text: REFERENTE A 6A, 7A E 8A ANUIDADES |
|
| B08K | Patent lapsed as no evidence of payment of the annual fee has been furnished to inpi [chapter 8.11 patent gazette] |
Free format text: REFERENTE AO DESPACHO 8.6 PUBLICADO NA RPI 1910 DE 14/08/2007. |