MX146540A - Sistema de comunicacion de radiofrecuencia mejorado - Google Patents

Sistema de comunicacion de radiofrecuencia mejorado

Info

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
Application number
MX173041A
Other languages
English (en)
Inventor
Timothy Philip Craig
James Roy Stimple
Original Assignee
Motorola 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 Motorola Inc filed Critical Motorola Inc
Publication of MX146540A publication Critical patent/MX146540A/es

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)
MX173041A 1977-05-02 1978-04-07 Sistema de comunicacion de radiofrecuencia mejorado MX146540A (es)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

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

Similar Documents

Publication Publication Date Title
MX146540A (es) Sistema de comunicacion de radiofrecuencia mejorado
NL7702019A (nl) Radio-omroepsysteem met zenderkarakterisering.
IT1132143B (it) Sistema radio mobile
SE7609324L (sv) Mottagare for radiosignaler
DK237778A (da) Mangestraaleantenne for radiofrekvens
IT1174448B (it) Sistema di comunicazione via satelite
NL180062C (nl) Radio-ontvanger.
SE7803498L (sv) Antennsystem
BR7806480A (pt) Sistema de radio duplex de microondas
IT1096807B (it) Sistema militare radar o per radiocomunicazioni
AT363127B (de) Richtfunknachrichtenuebertragungssystem
NL7614403A (nl) Radiofrequentie-antennestelselcomponent.
NL7802584A (nl) Antennestelsel.
BR7808354A (pt) Sistema de comunicacao
BR7808131A (pt) Sistema de comunicacoes
DK215781A (da) Radiomodtager
NL7805825A (nl) Radio-ontvanger.
IT1096808B (it) Sistema militare radar o per radiocomunicazioni
NL189840C (nl) Radio-ontvanginstallatie.
NL7807324A (nl) Radiohoorn of hoornantenne.
MX147212A (es) Sistema radiofonico
SE7806825L (sv) Interferensreduktionskrets for radiomottagare
DK155066C (da) Radiomodtager
IT1108979B (it) Dispositivo per trasmettere segnali di radiocomunicazioni
SE7803253L (sv) Talskyddad frekvensselektiv mottagare