MX146540A - Sistema de comunicacion de radiofrecuencia mejorado - Google Patents
Sistema de comunicacion de radiofrecuencia mejoradoInfo
- Publication number
- MX146540A MX146540A MX173041A MX17304178A MX146540A MX 146540 A MX146540 A MX 146540A MX 173041 A MX173041 A MX 173041A MX 17304178 A MX17304178 A MX 17304178A MX 146540 A MX146540 A MX 146540A
- Authority
- MX
- Mexico
- Prior art keywords
- communication system
- radio frequency
- frequency communication
- improved radio
- improved
- 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
- H04B7/0802—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 antenna selection
- H04B7/0805—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 antenna selection with single receiver and antenna switching
- H04B7/0808—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 antenna selection with single receiver and antenna switching comparing all antennas before reception
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Radio Transmission System (AREA)
- Circuits Of Receivers In General (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US05/792,963 US4101836A (en) | 1977-05-02 | 1977-05-02 | Sectored antenna receiving system |
Publications (1)
Publication Number | Publication Date |
---|---|
MX146540A true MX146540A (es) | 1982-07-07 |
Family
ID=25158631
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
MX173041A MX146540A (es) | 1977-05-02 | 1978-04-07 | Sistema de comunicacion de radiofrecuencia mejorado |
Country Status (12)
Country | Link |
---|---|
US (1) | US4101836A (es) |
JP (1) | JPS53136421A (es) |
AU (1) | AU515314B2 (es) |
CA (1) | CA1110708A (es) |
DE (1) | DE2815667A1 (es) |
FR (1) | FR2390051B1 (es) |
GB (1) | GB1564596A (es) |
IL (1) | IL54239A (es) |
MX (1) | MX146540A (es) |
NL (1) | NL7804570A (es) |
SE (1) | SE430113B (es) |
ZA (1) | ZA781460B (es) |
Families Citing this family (33)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4317229A (en) * | 1977-05-02 | 1982-02-23 | Motorola, Inc. | Sectored antenna receiving system |
US4349840A (en) * | 1980-11-25 | 1982-09-14 | Rca Corporation | Apparatus for automatically steering an electrically steerable television antenna |
US4433344A (en) * | 1981-11-25 | 1984-02-21 | Sundstrand Data Control, Inc. | Automatic television antenna control system |
US4549311A (en) * | 1982-08-03 | 1985-10-22 | Motorola, Inc. | Method and apparatus for measuring the strength of a radio signal frequency |
IL68977A0 (en) | 1982-08-03 | 1983-10-31 | Motorola Inc | Method and apparatus for controlling radio frequency signal communication paths |
US4485486A (en) * | 1982-08-03 | 1984-11-27 | Motorola, Inc. | Method and apparatus for assigning duplex radio channels and scanning duplex radio channels assigned to mobile and portable radio telephones in a cellular radiotelephone communications system |
GB2141588B (en) * | 1983-06-18 | 1986-08-13 | Standard Telephones Cables Ltd | Adaptive antenna array |
DE3324959A1 (de) * | 1983-07-11 | 1985-01-31 | Sennheiser Electronic Kg, 3002 Wedemark | Empfangsschaltung fuer ein raumdiversity-verfahren |
US4726050A (en) * | 1986-02-18 | 1988-02-16 | Motorola, Inc. | Scanning receiver allocation method and apparatus for cellular radiotelephone systems |
US4694484A (en) * | 1986-02-18 | 1987-09-15 | Motorola, Inc. | Cellular radiotelephone land station |
US4704734A (en) * | 1986-02-18 | 1987-11-03 | Motorola, Inc. | Method and apparatus for signal strength measurement and antenna selection in cellular radiotelephone systems |
US4794635A (en) * | 1986-11-28 | 1988-12-27 | Motorola, Inc. | Two-way radio communication system with max-minimum call assignment method |
US5095535A (en) * | 1988-07-28 | 1992-03-10 | Motorola, Inc. | High bit rate communication system for overcoming multipath |
US4983988A (en) * | 1988-11-21 | 1991-01-08 | E-Systems, Inc. | Antenna with enhanced gain |
US5244869A (en) * | 1990-10-23 | 1993-09-14 | Westinghouse Electric Corp. | Superconducting microwave frequency selective filter system |
JP3195926B2 (ja) * | 1991-02-08 | 2001-08-06 | フバ オートモティブ ゲゼルシャフト ミット ベシュレンクテル ハフツング ウント コンパニー コマンディッド ゲセルシャフト | 自動車テレビジョン信号受信における受信妨害を除去するためのアンテナダイバーシチ受信装置 |
US5488737A (en) * | 1992-11-17 | 1996-01-30 | Southwestern Bell Technology Resources, Inc. | Land-based wireless communications system having a scanned directional antenna |
EP0624919B1 (en) * | 1992-12-01 | 2002-02-06 | Ntt Mobile Communications Network Inc. | Multi-beam antenna apparatus |
US6201801B1 (en) | 1994-03-24 | 2001-03-13 | Ericsson Inc. | Polarization diversity phased array cellular base station and associated methods |
US6151310A (en) * | 1994-03-24 | 2000-11-21 | Ericsson Inc. | Dividable transmit antenna array for a cellular base station and associated method |
US5548813A (en) * | 1994-03-24 | 1996-08-20 | Ericsson Inc. | Phased array cellular base station and associated methods for enhanced power efficiency |
US5832389A (en) * | 1994-03-24 | 1998-11-03 | Ericsson Inc. | Wideband digitization systems and methods for cellular radiotelephones |
US5621752A (en) * | 1994-06-23 | 1997-04-15 | Qualcomm Incorporated | Adaptive sectorization in a spread spectrum communication system |
US5596333A (en) * | 1994-08-31 | 1997-01-21 | Motorola, Inc. | Method and apparatus for conveying a communication signal between a communication unit and a base site |
US5684491A (en) * | 1995-01-27 | 1997-11-04 | Hazeltine Corporation | High gain antenna systems for cellular use |
US6421543B1 (en) | 1996-01-29 | 2002-07-16 | Ericsson Inc. | Cellular radiotelephone base stations and methods using selected multiple diversity reception |
US6079367A (en) * | 1997-10-10 | 2000-06-27 | Dogwatch, Inc. | Animal training apparatus and method |
JP2000165945A (ja) * | 1998-11-25 | 2000-06-16 | Nec Mobile Commun Ltd | ローミング方法とその機能を有する移動局 |
US6745051B1 (en) * | 2000-07-10 | 2004-06-01 | Nortel Networks Limited | Six sector antenna structure |
US6957081B2 (en) * | 2001-12-21 | 2005-10-18 | Motorola, Inc. | Multi-mode mobile communications device with continuous mode transceiver and methods therefor |
DE102004027290A1 (de) * | 2004-06-04 | 2005-12-29 | Siemens Ag | Empfang von Signalen in einem Funkkommunikationssystem mittels zweier Richtcharakteristiken |
FR2885750A1 (fr) * | 2005-05-13 | 2006-11-17 | Thomson Licensing Sa | Methode de positionnement des antennes d'un systeme de transmission de donnees |
US10439684B2 (en) * | 2012-12-31 | 2019-10-08 | Futurewei Technologies, Inc. | Smart antenna platform for indoor wireless local area networks |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2485576A (en) * | 1947-04-19 | 1949-10-25 | Fed Telecomm Lab Inc | Sector antenna switching |
US3037113A (en) * | 1959-10-12 | 1962-05-29 | Motorola Inc | Control system |
US3095538A (en) * | 1960-10-28 | 1963-06-25 | Silberstein Richard | Satellite relay station using antenna diversity selection |
US3206679A (en) * | 1963-01-10 | 1965-09-14 | Being Company | Diversity combining system employing differential sampling |
US3368151A (en) * | 1965-12-27 | 1968-02-06 | Navy Usa | Continuous antenna selection system |
US3860872A (en) * | 1970-02-05 | 1975-01-14 | Pye Ltd | Multiple receiver selection system |
GB1276790A (en) * | 1970-03-20 | 1972-06-07 | Vaisala Oy | Improvements in devices by which antennae are automatically selected from arrays thereof and connected to radio receivers |
DE2534888C2 (de) * | 1975-08-05 | 1983-12-08 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Antennendiversityverfahren und Anordnung zur Durchführung des Verfahrens |
-
1977
- 1977-05-02 US US05/792,963 patent/US4101836A/en not_active Expired - Lifetime
-
1978
- 1978-03-08 CA CA298,517A patent/CA1110708A/en not_active Expired
- 1978-03-09 IL IL54239A patent/IL54239A/xx unknown
- 1978-03-10 GB GB9671/78A patent/GB1564596A/en not_active Expired
- 1978-03-13 ZA ZA00781460A patent/ZA781460B/xx unknown
- 1978-04-03 FR FR7809804A patent/FR2390051B1/fr not_active Expired
- 1978-04-07 MX MX173041A patent/MX146540A/es unknown
- 1978-04-11 DE DE19782815667 patent/DE2815667A1/de not_active Withdrawn
- 1978-04-21 SE SE7804576A patent/SE430113B/sv not_active IP Right Cessation
- 1978-04-26 AU AU35438/78A patent/AU515314B2/en not_active Expired
- 1978-04-27 NL NL7804570A patent/NL7804570A/xx not_active Application Discontinuation
- 1978-04-28 JP JP5222578A patent/JPS53136421A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
DE2815667A1 (de) | 1978-11-09 |
AU3543878A (en) | 1979-11-01 |
FR2390051B1 (es) | 1984-03-30 |
US4101836A (en) | 1978-07-18 |
CA1110708A (en) | 1981-10-13 |
JPS53136421A (en) | 1978-11-29 |
GB1564596A (en) | 1980-04-10 |
IL54239A (en) | 1980-10-26 |
FR2390051A1 (es) | 1978-12-01 |
SE7804576L (sv) | 1978-11-03 |
NL7804570A (nl) | 1978-11-06 |
SE430113B (sv) | 1983-10-17 |
ZA781460B (en) | 1979-03-28 |
AU515314B2 (en) | 1981-03-26 |
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