JPS5797240A - Radio equipment for simultaneous transmission and reception - Google Patents

Radio equipment for simultaneous transmission and reception

Info

Publication number
JPS5797240A
JPS5797240A JP55173648A JP17364880A JPS5797240A JP S5797240 A JPS5797240 A JP S5797240A JP 55173648 A JP55173648 A JP 55173648A JP 17364880 A JP17364880 A JP 17364880A JP S5797240 A JPS5797240 A JP S5797240A
Authority
JP
Japan
Prior art keywords
base station
power
voltage
antenna
electric field
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
JP55173648A
Other languages
Japanese (ja)
Inventor
Yukio Fukumura
Suomi Yuki
Akio Sasaki
Masao Takahashi
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.)
NEC Corp
Nippon Telegraph and Telephone Corp
Panasonic Mobile Communications Co Ltd
Original Assignee
NEC Corp
Nippon Telegraph and Telephone Corp
Matsushita Communication Industrial Co Ltd
Nippon Electric Co Ltd
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 NEC Corp, Nippon Telegraph and Telephone Corp, Matsushita Communication Industrial Co Ltd, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP55173648A priority Critical patent/JPS5797240A/en
Publication of JPS5797240A publication Critical patent/JPS5797240A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC

Landscapes

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

Abstract

PURPOSE:To reduce power consumption without giving unnecessary interruption to a base station, by providing a means which variably controls transmission power continuously in response to a reception input electric field strength at a mobile station. CONSTITUTION:Electromagnetic waves transmitted from a base station (not shown) are received at an antenna 1 of a mobile station and converted into intermediate frequency at a mixing and local oscillator 3 via a common use device 2, amplified and demodulated at an IF amplification demodulator 4 and given to a receiver 5. On the other hand, a part of the intermediate frequency signal obtained at the said mixing and local oscillator 3 is applied to an electric field detector 12, and the circuit 3 generates a DC voltage depending on the received intensity. Further, this DC voltage is applied to a power controller 13 provided between a transmission power amplifier 11 and a modulation/multiplier 9 as a control voltage. Thus, the power transmitted from the antenna 1 to the base station is controlled smaller as the received intensity is greater, and transmission with unnecessary power can not be made to the base station.
JP55173648A 1980-12-08 1980-12-08 Radio equipment for simultaneous transmission and reception Pending JPS5797240A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55173648A JPS5797240A (en) 1980-12-08 1980-12-08 Radio equipment for simultaneous transmission and reception

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55173648A JPS5797240A (en) 1980-12-08 1980-12-08 Radio equipment for simultaneous transmission and reception

Publications (1)

Publication Number Publication Date
JPS5797240A true JPS5797240A (en) 1982-06-16

Family

ID=15964504

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55173648A Pending JPS5797240A (en) 1980-12-08 1980-12-08 Radio equipment for simultaneous transmission and reception

Country Status (1)

Country Link
JP (1) JPS5797240A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6112136A (en) * 1984-06-28 1986-01-20 Clarion Co Ltd On-vihicle mobile radio equipment
JPS6143026A (en) * 1984-08-06 1986-03-01 Nippon Telegr & Teleph Corp <Ntt> System for controlling and transmitting received electric field
JPH04277940A (en) * 1991-03-05 1992-10-02 Sharp Corp Antenna power controller
JPH06311194A (en) * 1993-04-21 1994-11-04 Nec Corp Circuit for compensating distortion of multivalue quadrature amplitude modulated wave
JPH0730482A (en) * 1993-07-07 1995-01-31 Nec Corp Transmission output control device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6112136A (en) * 1984-06-28 1986-01-20 Clarion Co Ltd On-vihicle mobile radio equipment
JPS6143026A (en) * 1984-08-06 1986-03-01 Nippon Telegr & Teleph Corp <Ntt> System for controlling and transmitting received electric field
JPH04277940A (en) * 1991-03-05 1992-10-02 Sharp Corp Antenna power controller
JPH06311194A (en) * 1993-04-21 1994-11-04 Nec Corp Circuit for compensating distortion of multivalue quadrature amplitude modulated wave
JPH0730482A (en) * 1993-07-07 1995-01-31 Nec Corp Transmission output control device

Similar Documents

Publication Publication Date Title
EP0838896A3 (en) Radio receiver gain control
JPS5797240A (en) Radio equipment for simultaneous transmission and reception
JPS5642437A (en) Radio receiver
JPS57173210A (en) Antenna receiving and inputting circuit
JPS5411604A (en) Mobile station
JPS5773539A (en) Mobile radio communication system
JPS56156032A (en) Mobile communication system
JPS5451404A (en) Fm radio telegraphy unit for mobile mounting
KR970009004A (en) Cellular wireless repeater
JPS5881343A (en) Duplex transmitter and receiver for controlling transmission output according to intensity of received electric field
JPS646885A (en) Radar equipment
JPS5547740A (en) Fm receiver
JPS5690637A (en) Modulation and phase synchronization system
JPS55118240A (en) Information signal transmission unit
JPS5585150A (en) Reception system in radio telephone unit
JPS5767340A (en) Radiotelephone set mounted on mobile body
JPS5673936A (en) S/n monitor
JPS5485626A (en) Switching diversity type direct-shift repeating installation
JPS5635540A (en) Fm car radio
JPS57173231A (en) Radio receiver for vehicle
JPS55161430A (en) Radio communicating system
JPS5538725A (en) Transmitter/receiver
JPS5666937A (en) Radio transmitter and receiver
JPS647819A (en) Antenna booster
JPS57116443A (en) Radio communication device