JPS54146914A - Diversity receiving system - Google Patents

Diversity receiving system

Info

Publication number
JPS54146914A
JPS54146914A JP5440878A JP5440878A JPS54146914A JP S54146914 A JPS54146914 A JP S54146914A JP 5440878 A JP5440878 A JP 5440878A JP 5440878 A JP5440878 A JP 5440878A JP S54146914 A JPS54146914 A JP S54146914A
Authority
JP
Japan
Prior art keywords
signals
circuit
angle
mixed
complementary waveforms
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
JP5440878A
Other languages
Japanese (ja)
Other versions
JPS5935221B2 (en
Inventor
Kenkichi Hiraide
Takeshi Hattori
Fumiyuki Adachi
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 JP53054408A priority Critical patent/JPS5935221B2/en
Priority to GB7914338A priority patent/GB2023971B/en
Priority to US06/035,538 priority patent/US4397036A/en
Priority to DE2918269A priority patent/DE2918269C3/en
Priority to NLAANVRAGE7903609,A priority patent/NL176624C/en
Priority to SE7904058A priority patent/SE442934B/en
Publication of JPS54146914A publication Critical patent/JPS54146914A/en
Publication of JPS5935221B2 publication Critical patent/JPS5935221B2/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
    • H04B7/0842—Weighted combining
    • H04B7/0865—Independent weighting, i.e. weights based on own antenna reception parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
    • H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity

Landscapes

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

Abstract

PURPOSE:To reduce code errors dependent upon multi-path fading by subjecting receiving signals to angle modulation by complementary waveforms which are synchronized with the repeat period of digital modulation signals. CONSTITUTION:Signals received by receiving antennas 1 and 2 are mixed with the output of local oscillator 9, which was subjected to angle modulation by specific complementary waveforms applied to angle modulating input signal terminals 7 and 8 by using angle modulators 5 and 6, in frequency converters 3 and 4. This mixed output is synthesized by synthesizer 10 and is subjected to delay detection by circuit 11, and clock signals reproduced by circuit 13 are used to subject the mixed output above to integration detection by circuit 12, and then, the mixed output above becomes demodulation reproduced signals and is outputted from terminal 15. Then, clock signals of circuit 13 are used to generate specific complementary waveforms inputted to terminals 7 and 8 by waveform generator 14.
JP53054408A 1978-05-10 1978-05-10 Diversity reception method Expired JPS5935221B2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP53054408A JPS5935221B2 (en) 1978-05-10 1978-05-10 Diversity reception method
GB7914338A GB2023971B (en) 1978-05-10 1979-04-25 Digital signal transmission system
US06/035,538 US4397036A (en) 1978-05-10 1979-05-03 Diversity system
DE2918269A DE2918269C3 (en) 1978-05-10 1979-05-07 Diversity system for the transmission of an angle-modulated digital signal
NLAANVRAGE7903609,A NL176624C (en) 1978-05-10 1979-05-08 DIVERSITY SYSTEM.
SE7904058A SE442934B (en) 1978-05-10 1979-05-09 DIVERSITY SYSTEM FOR TRANSFER OF AN ANGLE MODULATED DIGITAL SIGNAL

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53054408A JPS5935221B2 (en) 1978-05-10 1978-05-10 Diversity reception method

Publications (2)

Publication Number Publication Date
JPS54146914A true JPS54146914A (en) 1979-11-16
JPS5935221B2 JPS5935221B2 (en) 1984-08-27

Family

ID=12969867

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53054408A Expired JPS5935221B2 (en) 1978-05-10 1978-05-10 Diversity reception method

Country Status (1)

Country Link
JP (1) JPS5935221B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997019536A1 (en) * 1995-11-22 1997-05-29 Sanyo Electric Co., Ltd. Diversity device improved in ability to reproduce carrier in synchronous detection

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997019536A1 (en) * 1995-11-22 1997-05-29 Sanyo Electric Co., Ltd. Diversity device improved in ability to reproduce carrier in synchronous detection
GB2322266A (en) * 1995-11-22 1998-08-19 Sanyo Electric Co Diversity device improved in ability to reproduce carrier in synchronous detection
GB2322266B (en) * 1995-11-22 2000-03-22 Sanyo Electric Co Diversity apparatus with improved ability of reproducing carrier wave in synchronous detection
AU731683B2 (en) * 1995-11-22 2001-04-05 Kyocera Corporation Diversity apparatus with improved ability of reproducing carrier wave in synchronous detection

Also Published As

Publication number Publication date
JPS5935221B2 (en) 1984-08-27

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