GB1180440A - Improvements in or relating to Arrangements for Diversity Reception - Google Patents

Improvements in or relating to Arrangements for Diversity Reception

Info

Publication number
GB1180440A
GB1180440A GB3536767A GB3536767A GB1180440A GB 1180440 A GB1180440 A GB 1180440A GB 3536767 A GB3536767 A GB 3536767A GB 3536767 A GB3536767 A GB 3536767A GB 1180440 A GB1180440 A GB 1180440A
Authority
GB
United Kingdom
Prior art keywords
diversity reception
combining
signals
signal
receivers
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.)
Expired
Application number
GB3536767A
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.)
Compagnie Francaise Thomson Houston SA
Original Assignee
Compagnie Francaise Thomson Houston SA
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 Compagnie Francaise Thomson Houston SA filed Critical Compagnie Francaise Thomson Houston SA
Publication of GB1180440A publication Critical patent/GB1180440A/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
    • H04B7/0868—Hybrid systems, i.e. switching and combining
    • H04B7/0871—Hybrid systems, i.e. switching and combining using different reception schemes, at least one of them being a diversity reception scheme
    • 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

Landscapes

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

Abstract

1,180,440. Diversity reception systems. COMPAGNIE FRANCAISE THOMSON HOUSTON-HOTCHKISS BRANDT. 1 Aug., 1967 [4 Aug., 1966], No. 35367/67. Heading H4L. In a diversity reception system means are provided for combining the received signals or for selecting the best signal and the method which gives the best signal/noise ratio in the output signal is selected automatically. The system is applicable to predetection combining, in which case automatic phase control of the received signals is necessary, or to post detection combining. As shown in Fig. 3, the outputs of receivers 5, 6 are supplied via gates 9, 10 respectively and combined at 13 to provide an output S and are rectified at 7, 8 respectively and added at 11 to provide a common A.G.C. for the two receivers. The rectified signals V 1 , V 2 from diodes 7, 8 are also supplied to a comparator 12 where they are compared with a fixed reference voltage Vc. If V1-V2 is greater than Vc the comparator 12 applies a signal to cut off the gate 10 and if V2-V1 is greater than Vc the gate 9 is cut off. When the difference between V1 and V2 is less than Vc both gates remain open and the two signals are added.
GB3536767A 1966-08-04 1967-08-01 Improvements in or relating to Arrangements for Diversity Reception Expired GB1180440A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR72069A FR1499243A (en) 1966-08-04 1966-08-04 Improvements to diversity reception methods and devices

Publications (1)

Publication Number Publication Date
GB1180440A true GB1180440A (en) 1970-02-04

Family

ID=8614846

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3536767A Expired GB1180440A (en) 1966-08-04 1967-08-01 Improvements in or relating to Arrangements for Diversity Reception

Country Status (4)

Country Link
DE (1) DE1591052A1 (en)
FR (1) FR1499243A (en)
GB (1) GB1180440A (en)
NL (1) NL6710817A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2502871A1 (en) * 1981-03-26 1982-10-01 Ferranti Plc SIGNAL COMBINATION AND SWITCHING SYSTEM FOR A RADIO COMMUNICATION SYSTEM
DE3427473A1 (en) * 1983-07-25 1985-02-14 Sony Corp., Tokio/Tokyo DIVERSITY RECEIVER
GB2294609A (en) * 1994-10-26 1996-05-01 Northern Telecom Ltd A base station with diversity reception
GB2367984A (en) * 2000-06-21 2002-04-17 Agere Syst Guardian Corp Reducing interference using flexible beam selection

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2094293A5 (en) * 1970-06-16 1972-02-04 Cit Alcatel
US3729681A (en) * 1971-08-02 1973-04-24 Gen Electric Receiver selecting arrangement

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2502871A1 (en) * 1981-03-26 1982-10-01 Ferranti Plc SIGNAL COMBINATION AND SWITCHING SYSTEM FOR A RADIO COMMUNICATION SYSTEM
US4450585A (en) * 1981-03-26 1984-05-22 Ferranti Plc Signal switching and combining systems for diversity radio receiving systems
DE3427473A1 (en) * 1983-07-25 1985-02-14 Sony Corp., Tokio/Tokyo DIVERSITY RECEIVER
GB2294609A (en) * 1994-10-26 1996-05-01 Northern Telecom Ltd A base station with diversity reception
GB2294609B (en) * 1994-10-26 1999-01-27 Northern Telecom Ltd A base station arrangement
GB2367984A (en) * 2000-06-21 2002-04-17 Agere Syst Guardian Corp Reducing interference using flexible beam selection
GB2367984B (en) * 2000-06-21 2005-02-16 Agere Syst Guardian Corp Method and apparatus for reducing interference in non-stationary subscriber radio units using flexible beam selection

Also Published As

Publication number Publication date
FR1499243A (en) 1967-10-27
NL6710817A (en) 1968-02-05
DE1591052A1 (en) 1970-08-13

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