JPS5466702A - Control unit for transmission frequency - Google Patents

Control unit for transmission frequency

Info

Publication number
JPS5466702A
JPS5466702A JP13386077A JP13386077A JPS5466702A JP S5466702 A JPS5466702 A JP S5466702A JP 13386077 A JP13386077 A JP 13386077A JP 13386077 A JP13386077 A JP 13386077A JP S5466702 A JPS5466702 A JP S5466702A
Authority
JP
Japan
Prior art keywords
frequency
signal
output
oscillator
reception
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.)
Granted
Application number
JP13386077A
Other languages
Japanese (ja)
Other versions
JPS5811143B2 (en
Inventor
Hiroaki Shimayama
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
Original Assignee
NEC Corp
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 Electric Co Ltd filed Critical NEC Corp
Priority to JP52133860A priority Critical patent/JPS5811143B2/en
Publication of JPS5466702A publication Critical patent/JPS5466702A/en
Publication of JPS5811143B2 publication Critical patent/JPS5811143B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/10—Polarisation diversity; Directional diversity

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 increase S/N of the reception signal, and to control transmission frequency, by mixing the output frequency of the voltage control oscillator and the input frequency, performimg phase comparison for the output with the reference frequency and driving the voltage controlled oscillator with this comparison output. CONSTITUTION:In the reception circuit, radio pilot signal is received with the input terminal 1, amplification IFA 6 and phase detection PD7 are made, and the voltage controlled oscillator VCO 10 outputs the signal in which the oscillation frequency is changed with the control voltage signal, and the output of the frequency variable signal and the reception circuit is converted with the frequency converter 15. Further, this converted output is fed to the oscillator 10 as control voltage signal by taking the output of the given reference frequency oscillator 11 as reference, transmitting transmission signal. In this, case, to the frequency variation the reception pilot signal, by forming the frequency variation of transmission signal toward reverse, the S/N of reception signal is increased and the transmission signal can be controlled.
JP52133860A 1977-11-07 1977-11-07 Transmission frequency control device Expired JPS5811143B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP52133860A JPS5811143B2 (en) 1977-11-07 1977-11-07 Transmission frequency control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP52133860A JPS5811143B2 (en) 1977-11-07 1977-11-07 Transmission frequency control device

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP4055182A Division JPS57181239A (en) 1982-03-15 1982-03-15 Transmission frequency controller

Publications (2)

Publication Number Publication Date
JPS5466702A true JPS5466702A (en) 1979-05-29
JPS5811143B2 JPS5811143B2 (en) 1983-03-01

Family

ID=15114728

Family Applications (1)

Application Number Title Priority Date Filing Date
JP52133860A Expired JPS5811143B2 (en) 1977-11-07 1977-11-07 Transmission frequency control device

Country Status (1)

Country Link
JP (1) JPS5811143B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4523157A (en) * 1981-10-27 1985-06-11 Nippon Kogaku K. K. PLL out-of-capture range detection and lock acquisition circuit
JPS61200727A (en) * 1985-03-04 1986-09-05 Radio Res Lab Simple satellite communication system
JPH02181526A (en) * 1989-01-06 1990-07-16 Toshiba Corp Reference station for satellite communication

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4523157A (en) * 1981-10-27 1985-06-11 Nippon Kogaku K. K. PLL out-of-capture range detection and lock acquisition circuit
JPS61200727A (en) * 1985-03-04 1986-09-05 Radio Res Lab Simple satellite communication system
JPH02181526A (en) * 1989-01-06 1990-07-16 Toshiba Corp Reference station for satellite communication

Also Published As

Publication number Publication date
JPS5811143B2 (en) 1983-03-01

Similar Documents

Publication Publication Date Title
JPS6432515A (en) Voltage controlled ring oscillator
ES487141A1 (en) Digital phase control circuit with auxiliary circuit.
JPS5466702A (en) Control unit for transmission frequency
JPS5642437A (en) Radio receiver
JPS5531304A (en) Reception frequency selecting device
JPS5547740A (en) Fm receiver
ES8306299A1 (en) Frequency converter and phase locked loop circuit
JPS5476261A (en) Electronic wristwatch
JPS5538725A (en) Transmitter/receiver
JPS5795729A (en) Radio transmitter and receiver
JPS55125728A (en) Antenna preset tuning unit for transmitter
JPS57188147A (en) Radio transmitter and receiver
JPS5466709A (en) Space diversity system in direct repeater unit
JPS53109462A (en) Arbitrary frequency generator
JPS5485627A (en) Multi-frequency direct-shift repeating installation
JPS52100911A (en) Transceiver unit
JPS5228846A (en) Crystal oscillator
JPS55166348A (en) Multi-channel radio transmitter/receiver
JPS54154211A (en) Local oscillation circuit
GB1536094A (en) Radio receiver/emitter station
JPS561630A (en) Broadcast receiver
JPS6484948A (en) Demodulation system for frequency modulation signal
JPS5412208A (en) Gain-stabilized transmitter
JPS5625810A (en) Receiver
JPS5459812A (en) Receiver