JPS57125537A - Space diversity receiver - Google Patents

Space diversity receiver

Info

Publication number
JPS57125537A
JPS57125537A JP56010885A JP1088581A JPS57125537A JP S57125537 A JPS57125537 A JP S57125537A JP 56010885 A JP56010885 A JP 56010885A JP 1088581 A JP1088581 A JP 1088581A JP S57125537 A JPS57125537 A JP S57125537A
Authority
JP
Japan
Prior art keywords
output
power
phase
signal
power synthesizer
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
JP56010885A
Other languages
Japanese (ja)
Inventor
Kojiro Tajima
Shozo Komaki
Shigeharu Okamoto
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 JP56010885A priority Critical patent/JPS57125537A/en
Publication of JPS57125537A publication Critical patent/JPS57125537A/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
    • H04B7/02—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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Landscapes

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

Abstract

PURPOSE:To reduce synthesized phase errors based on the deviation of amplitude of a phase modulator, by providing a phase modulator which is modulated toward an opposite direction to each other, in two input paths to a power synthesizer. CONSTITUTION:Frequency converters 1, 2 convert signals IN1, IN2 from two antenas provided beforehand so that the correlation of attenuation or reception power is lowered at fading, into an intermediate frequency signal with an output of a reception local oscillator 3. A phase shifter 4 receiving the output of the converter 1 performs a suitable phase shift operation with a signal of a control circuit 9 and the shifted signal is applied to a power synthesizer 11. The output of the converter 2 is applied to a power synthesizer 12. A power synthesizer 13 synthesizes the 1st output of the power synthesizers 11, 12 to produce the output of the main signal system. The 2nd output of the power synthesizers 11, 12 are subjected to the modulation mutually toward an opposite direction at phase modulators 5, 14 with a signal of a low-frequency oscillator 10. The output of the modulator is given to a power synthesizer 6. The phase modulators 5, 14 can be used at a region with less amplitude deviation and the deviation can be improved correspondingly.
JP56010885A 1981-01-29 1981-01-29 Space diversity receiver Pending JPS57125537A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56010885A JPS57125537A (en) 1981-01-29 1981-01-29 Space diversity receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56010885A JPS57125537A (en) 1981-01-29 1981-01-29 Space diversity receiver

Publications (1)

Publication Number Publication Date
JPS57125537A true JPS57125537A (en) 1982-08-04

Family

ID=11762764

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56010885A Pending JPS57125537A (en) 1981-01-29 1981-01-29 Space diversity receiver

Country Status (1)

Country Link
JP (1) JPS57125537A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5345603A (en) * 1990-11-13 1994-09-06 U.S. Philips Corporation Receiver arrangement formed by a plurality of receive branches

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5345603A (en) * 1990-11-13 1994-09-06 U.S. Philips Corporation Receiver arrangement formed by a plurality of receive branches

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