GB2020949A - Diversity receiver switching - Google Patents

Diversity receiver switching

Info

Publication number
GB2020949A
GB2020949A GB7916064A GB7916064A GB2020949A GB 2020949 A GB2020949 A GB 2020949A GB 7916064 A GB7916064 A GB 7916064A GB 7916064 A GB7916064 A GB 7916064A GB 2020949 A GB2020949 A GB 2020949A
Authority
GB
United Kingdom
Prior art keywords
logarithmic amplifiers
diversity receiver
noise
receiver switching
comparator
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
GB7916064A
Other versions
GB2020949B (en
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.)
Patelhold Patenverwertungs and Elektro-Holding AG
Original Assignee
Patelhold Patenverwertungs and Elektro-Holding AG
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 Patelhold Patenverwertungs and Elektro-Holding AG filed Critical Patelhold Patenverwertungs and Elektro-Holding AG
Publication of GB2020949A publication Critical patent/GB2020949A/en
Application granted granted Critical
Publication of GB2020949B publication Critical patent/GB2020949B/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
    • H04B7/0802—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 antenna selection
    • H04B7/0817—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 antenna selection with multiple receivers and antenna path selection
    • H04B7/082—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 antenna selection with multiple receivers and antenna path selection selecting best antenna path

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Radio Transmission System (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)

Abstract

Apparatus for the automatic disconnection at S1 or S2 of a receiving channel carrying excessive noise includes independent logarithmic amplifiers 16 which are used to evaluate received noise. The logarithmic amplifiers are constructed as monolithic units on a single silicon chip for the purpose of thermal equalisation. On the same chip active rectifiers 17 produce rectified voltages representative of the respective noise levels, which are fed to a comparator 18 operating the control logic 19 for the switches S1, S2. <IMAGE>
GB7916064A 1978-05-11 1979-05-09 Diversity receiver switching Expired GB2020949B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH513078A CH630498A5 (en) 1978-05-11 1978-05-11 ARRANGEMENT FOR THE AUTOMATIC SWITCHING OF DIRECTIONAL RADIO SYSTEMS OPERATED IN PARALLEL.

Publications (2)

Publication Number Publication Date
GB2020949A true GB2020949A (en) 1979-11-21
GB2020949B GB2020949B (en) 1982-06-16

Family

ID=4288436

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7916064A Expired GB2020949B (en) 1978-05-11 1979-05-09 Diversity receiver switching

Country Status (7)

Country Link
CH (1) CH630498A5 (en)
DE (1) DE2824329A1 (en)
FR (1) FR2425774A1 (en)
GB (1) GB2020949B (en)
IT (1) IT1112747B (en)
NL (1) NL7903624A (en)
NO (1) NO791526L (en)

Cited By (1)

* 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

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55150627A (en) * 1979-05-14 1980-11-22 Nec Corp Signal synthesizing circuit
FR2538645B1 (en) * 1982-12-28 1986-04-11 Thomson Csf METHOD AND DEVICE FOR INTERPOLATING SPEECH IN A DIGITAL SPEECH TRANSMISSION SYSTEM

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4028564A (en) * 1971-09-22 1977-06-07 Robert Bosch G.M.B.H. Compensated monolithic integrated current source
US4097815A (en) * 1975-04-09 1978-06-27 Indesit Industria Elettrodomestici Italiana S.P.A. Amplifying circuit

Cited By (1)

* 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

Also Published As

Publication number Publication date
IT7922509A0 (en) 1979-05-09
FR2425774B1 (en) 1982-04-23
IT1112747B (en) 1986-01-20
FR2425774A1 (en) 1979-12-07
NL7903624A (en) 1979-11-13
NO791526L (en) 1979-11-13
GB2020949B (en) 1982-06-16
CH630498A5 (en) 1982-06-15
DE2824329A1 (en) 1979-11-15
DE2824329C2 (en) 1987-04-30

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee