JPS577642A - Phase-composite space diversity system - Google Patents

Phase-composite space diversity system

Info

Publication number
JPS577642A
JPS577642A JP8167380A JP8167380A JPS577642A JP S577642 A JPS577642 A JP S577642A JP 8167380 A JP8167380 A JP 8167380A JP 8167380 A JP8167380 A JP 8167380A JP S577642 A JPS577642 A JP S577642A
Authority
JP
Japan
Prior art keywords
phase
component
frequency
theta
control system
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
JP8167380A
Other languages
Japanese (ja)
Other versions
JPS609379B2 (en
Inventor
Osamu Yamamoto
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 JP55081673A priority Critical patent/JPS609379B2/en
Publication of JPS577642A publication Critical patent/JPS577642A/en
Publication of JPS609379B2 publication Critical patent/JPS609379B2/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
    • H04B7/04—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
    • H04B7/0837—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 pre-detection combining
    • H04B7/084—Equal gain combining, only phase adjustments

Landscapes

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

Abstract

PURPOSE:To improve the stability and sensitivity of a control system by avoiding the stabilization of the control system due to a difference in phase angle (theta) (+ or -180 deg.) between composite signals of two waves from two antennas. CONSTITUTION:When a control system is stabilized, a component of a frequency (2fc) twice that of a sensing signal (frequency fc) appears in an amplitude modulated component and the former component signal when its phase angle (theta) is zero is out of phase with that when + or -180 deg.. For this purpose, a circuit which detects the component of the frequency twice that of the said sensing signal in the amplitude modulated component of a composite output is provided and when it is detected that two signals are synthesized with the opposite phases from the phase relation between the detection output of the circuit and the signal of the frequency twice that of the sensing signal, the control inverting the said phase angle (theta) is exercised.
JP55081673A 1980-06-16 1980-06-16 Phase synthesis space diversity method Expired JPS609379B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55081673A JPS609379B2 (en) 1980-06-16 1980-06-16 Phase synthesis space diversity method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55081673A JPS609379B2 (en) 1980-06-16 1980-06-16 Phase synthesis space diversity method

Publications (2)

Publication Number Publication Date
JPS577642A true JPS577642A (en) 1982-01-14
JPS609379B2 JPS609379B2 (en) 1985-03-09

Family

ID=13752858

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55081673A Expired JPS609379B2 (en) 1980-06-16 1980-06-16 Phase synthesis space diversity method

Country Status (1)

Country Link
JP (1) JPS609379B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4549185A (en) * 1981-11-03 1985-10-22 Amstar Technical Products Co., Inc. Signal distribution system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6011563U (en) * 1983-06-30 1985-01-26 パイオニア株式会社 FM wide receiver

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4549185A (en) * 1981-11-03 1985-10-22 Amstar Technical Products Co., Inc. Signal distribution system

Also Published As

Publication number Publication date
JPS609379B2 (en) 1985-03-09

Similar Documents

Publication Publication Date Title
DE3465400D1 (en) Receiver for rf signals comprising a pair of parallel signal paths
JPS55132132A (en) Phase synchronizing circuit
JPS577642A (en) Phase-composite space diversity system
GB846026A (en) Apparatus for the radio-electric measurement of the angular position of an object
JPS55121163A (en) Direction measuring unit
GB1432431A (en) Frequency tracking filter
US2489615A (en) Radio aid to air navigation
JPS5698035A (en) Space diversity receiving system
JPS567534A (en) Compensating system for identification of cross polarization
KR870000138B1 (en) Auto direction finder
JPS643081Y2 (en)
JPS5672548A (en) Space diversity receiving system
US2959780A (en) Electromagnetic navigation systems
JPS57154947A (en) Receiving system with elimination of disturbance wave
SU413435A1 (en)
JPS56155875A (en) Receiver for monopulse measuring angle
GB1203894A (en) An airport runway distance-meter
JPS6455923A (en) Space diversity control circuit
JPS60219573A (en) Monopulse receiver
JPS54152494A (en) Radio-wave azimuth detector
JPS57172213A (en) Detection system for position of moving body
JPS5799831A (en) Interference wave compensating device
JPS56122977A (en) Light wave range finder
JPS5729968A (en) Direction detecting device for radio interference wave of direction finder
JPS59117834A (en) Space diversity receiving system