JPS55143854A - Mobile radio space diversity system using optical fiber - Google Patents

Mobile radio space diversity system using optical fiber

Info

Publication number
JPS55143854A
JPS55143854A JP5193479A JP5193479A JPS55143854A JP S55143854 A JPS55143854 A JP S55143854A JP 5193479 A JP5193479 A JP 5193479A JP 5193479 A JP5193479 A JP 5193479A JP S55143854 A JPS55143854 A JP S55143854A
Authority
JP
Japan
Prior art keywords
signal
light
base station
frequency
intermediate frequency
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
JP5193479A
Other languages
Japanese (ja)
Inventor
Nobuo Nakajima
Kota Kinoshita
Shuichi Samejima
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP5193479A priority Critical patent/JPS55143854A/en
Publication of JPS55143854A publication Critical patent/JPS55143854A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Optical Communication System (AREA)
  • Radio Transmission System (AREA)

Abstract

PURPOSE:To make space diversity of the mobile radio system possible by constituting the transmission line between plural base stations and line control base stations by optical fibers and by modulating the light by the carrier frequency or the intermediate frequency and transmitting the light. CONSTITUTION:The signal from antenna 13 of mobile station 11 is acquired by antennas of radio base station 12a and line control radio base station 12b. The signal acquired by base station 12a is amplified in 14 and is subjected to frequency conversion in 15 and becomes an intermediate frequency signal and is sent to light modulator 16. Light modulator 16 modulates the light by the sent signal and transmits the light signal to base station 12b through optical fiber transmission line 17. Base station 12b demodulates the signal from transmission line 17 by light demodulator 18 into an intermediate frequency signal, and this signal and the intermediate signal, which is acquired from the antenna and is subjected to frequency conversion in 15, are synthesized with the same phase by synthesizing circuit 19. The signal synthesized by circuit 19 is demodulated in 20 and is sent to sound circuit 21. Since receiving signals from respective base stations are synthesized in the intermediate frequency band with the same phase, frequency of level lowering dependent upon fading is reduced.
JP5193479A 1979-04-26 1979-04-26 Mobile radio space diversity system using optical fiber Pending JPS55143854A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5193479A JPS55143854A (en) 1979-04-26 1979-04-26 Mobile radio space diversity system using optical fiber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5193479A JPS55143854A (en) 1979-04-26 1979-04-26 Mobile radio space diversity system using optical fiber

Publications (1)

Publication Number Publication Date
JPS55143854A true JPS55143854A (en) 1980-11-10

Family

ID=12900691

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5193479A Pending JPS55143854A (en) 1979-04-26 1979-04-26 Mobile radio space diversity system using optical fiber

Country Status (1)

Country Link
JP (1) JPS55143854A (en)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01113429U (en) * 1988-01-25 1989-07-31
JPH022727A (en) * 1988-06-17 1990-01-08 Shiyoudenriyoku Kosoku Tsushin Kenkyusho:Kk Radio wave transmission/reception system via optical fiber
EP0391597A2 (en) * 1989-04-04 1990-10-10 AT&T Corp. Optical fiber microcellular mobile radio
US5067173A (en) * 1990-12-20 1991-11-19 At&T Bell Laboratories Microcellular communications system using space diversity reception
JPH04124919A (en) * 1990-09-17 1992-04-24 Nec Corp Radio base station antenna system, centralized base station, mobile communication equipment, and receiving state measuring instrument for mobile communication
JPH0591002A (en) * 1991-09-27 1993-04-09 Nippon Telegr & Teleph Corp <Ntt> Mobile communication system
JPH05102894A (en) * 1991-10-07 1993-04-23 Nippon Telegr & Teleph Corp <Ntt> Diversity transmitting/receiving system
US5339184A (en) * 1992-06-15 1994-08-16 Gte Laboratories Incorporated Fiber optic antenna remoting for multi-sector cell sites
US5424864A (en) * 1991-10-24 1995-06-13 Nec Corporation Microcellular mobile communication system
JPH08191478A (en) * 1995-01-11 1996-07-23 Nec Corp Optical network and radio base station
US5594579A (en) * 1991-12-26 1997-01-14 Motorola, Inc. Radio permitting information transfer between radio frequency shielded sub-systems
US5682256A (en) * 1988-11-11 1997-10-28 British Telecommunications Public Limited Company Communications system
US5689355A (en) * 1994-03-24 1997-11-18 Kokusai Electric Co., Ltd. Repeater using optical cables for radio paging system
US5812296A (en) * 1995-08-23 1998-09-22 Ntt Mobile Communications Networks Inc. Fiber optics transmission system
US5949564A (en) * 1993-03-01 1999-09-07 British Telecommunications Public Limited Company Transducer
US6122083A (en) * 1994-03-18 2000-09-19 Fujitsu Limited Mobile communication system having a small base station and equipment for its system
EP1089579A1 (en) * 1999-09-30 2001-04-04 Oki Electric Industry Co., Ltd. Radio road vehicle communication system with enhanced system extendibility
KR100350542B1 (en) * 1998-02-13 2002-08-28 루센트 테크놀러지스 인크 A wireless telecommunications system architecture supporting receive diversity
US6909893B2 (en) 2000-03-15 2005-06-21 Denso Corporation Wireless communication system, fixed base station and mobile terminal station
WO2018151121A1 (en) * 2017-02-17 2018-08-23 日本電気株式会社 Communication device and communication method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4953357A (en) * 1972-09-26 1974-05-23

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4953357A (en) * 1972-09-26 1974-05-23

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01113429U (en) * 1988-01-25 1989-07-31
JPH022727A (en) * 1988-06-17 1990-01-08 Shiyoudenriyoku Kosoku Tsushin Kenkyusho:Kk Radio wave transmission/reception system via optical fiber
US5159479A (en) * 1988-06-17 1992-10-27 Small Power Communication Systems Research Laboratories Co., Ltd. Private branch radio communication system using optical fibers
US5682256A (en) * 1988-11-11 1997-10-28 British Telecommunications Public Limited Company Communications system
EP0391597A2 (en) * 1989-04-04 1990-10-10 AT&T Corp. Optical fiber microcellular mobile radio
JPH04124919A (en) * 1990-09-17 1992-04-24 Nec Corp Radio base station antenna system, centralized base station, mobile communication equipment, and receiving state measuring instrument for mobile communication
US5067173A (en) * 1990-12-20 1991-11-19 At&T Bell Laboratories Microcellular communications system using space diversity reception
EP0492851A2 (en) * 1990-12-20 1992-07-01 AT&T Corp. Microcellular communications system using space diversity reception
JPH0591002A (en) * 1991-09-27 1993-04-09 Nippon Telegr & Teleph Corp <Ntt> Mobile communication system
JPH05102894A (en) * 1991-10-07 1993-04-23 Nippon Telegr & Teleph Corp <Ntt> Diversity transmitting/receiving system
US5424864A (en) * 1991-10-24 1995-06-13 Nec Corporation Microcellular mobile communication system
US5594579A (en) * 1991-12-26 1997-01-14 Motorola, Inc. Radio permitting information transfer between radio frequency shielded sub-systems
US5339184A (en) * 1992-06-15 1994-08-16 Gte Laboratories Incorporated Fiber optic antenna remoting for multi-sector cell sites
US5949564A (en) * 1993-03-01 1999-09-07 British Telecommunications Public Limited Company Transducer
US6122083A (en) * 1994-03-18 2000-09-19 Fujitsu Limited Mobile communication system having a small base station and equipment for its system
US5689355A (en) * 1994-03-24 1997-11-18 Kokusai Electric Co., Ltd. Repeater using optical cables for radio paging system
JPH08191478A (en) * 1995-01-11 1996-07-23 Nec Corp Optical network and radio base station
US5812296A (en) * 1995-08-23 1998-09-22 Ntt Mobile Communications Networks Inc. Fiber optics transmission system
US6539239B1 (en) 1998-02-13 2003-03-25 Lucent Technologies, Inc. Wireless telecommunications system architecture supporting receive diversity
KR100350542B1 (en) * 1998-02-13 2002-08-28 루센트 테크놀러지스 인크 A wireless telecommunications system architecture supporting receive diversity
EP1089579A1 (en) * 1999-09-30 2001-04-04 Oki Electric Industry Co., Ltd. Radio road vehicle communication system with enhanced system extendibility
US6909893B2 (en) 2000-03-15 2005-06-21 Denso Corporation Wireless communication system, fixed base station and mobile terminal station
WO2018151121A1 (en) * 2017-02-17 2018-08-23 日本電気株式会社 Communication device and communication method
JPWO2018151121A1 (en) * 2017-02-17 2019-12-19 日本電気株式会社 Communication device and communication method
US11277758B2 (en) 2017-02-17 2022-03-15 Nec Corporation Communication apparatus and communication method

Similar Documents

Publication Publication Date Title
JPS55143854A (en) Mobile radio space diversity system using optical fiber
KR100679706B1 (en) High Efficiency Sub-Orbital High Altitude Telecommunications System
WO1998032244A3 (en) System and method for transmitting data
CA2053595A1 (en) Microcellular communications system using space diversity reception
CA2109530A1 (en) Frequency diversity transmitter and receiver system
SE9503394L (en) Radio station utilizing space diversity and polarization diversity
DE69535708D1 (en) SPECTRAL EFFICIENT WIRELESS COMMUNICATION SYSTEMS HIGH CAPACITY
CA2051496A1 (en) Mobile communication system
CA2044670A1 (en) Radio Communication System
RU97118227A (en) ANTENNA WITH A WIDE Lobe DIRECTION DIAGRAM
EP1085678A3 (en) Radio communication system with variable beam-pattern antenna array
CA2268309A1 (en) Cellular system with optical link between mobile telephone switching office and cell sites
WO1998034424A3 (en) Cellular communication system with multiple same frequency broadcasts in a cell
DE3278260D1 (en) Broadcasting method for a mobile radio network
GB2063623B (en) Pre-dection maximal ratio combining system for diversity reception of radio frequency signals
GB1534379A (en) Communications system
CA2260281A1 (en) A wireless telecommunications system architecture supporting receive diversity
EP0715786B1 (en) Base station equipment using diversity reception
ATE2369T1 (en) WIRELESS.
SE9203335D0 (en) RADIO MODULE INCLUDED IN A PRIMARY RADIO STATION CORRECT RADIO STRUCTURE CONTAINING SUCH MODULES
US6317610B1 (en) Method of combining several signals, and base station
GB1422924A (en) Radio communication system
JPS5665538A (en) Control signal relay system for mobile communication
JP3384551B2 (en) Optical Wireless Fusion Transmission System
EP0102129A3 (en) Radio communication system