BR8707993A - F.M REPEATER COMMUNICATION SYSTEM AND F.M RECEIVER - Google Patents

F.M REPEATER COMMUNICATION SYSTEM AND F.M RECEIVER

Info

Publication number
BR8707993A
BR8707993A BR8707993A BR8707993A BR8707993A BR 8707993 A BR8707993 A BR 8707993A BR 8707993 A BR8707993 A BR 8707993A BR 8707993 A BR8707993 A BR 8707993A BR 8707993 A BR8707993 A BR 8707993A
Authority
BR
Brazil
Prior art keywords
receiver
communication system
repeater communication
repeater
communication
Prior art date
Application number
BR8707993A
Other languages
Portuguese (pt)
Inventor
Bruce Charles Eastmond
Donald Laverne Linder
Elliot Wai Leon Lum
Original Assignee
Motorola Inc
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
Priority claimed from US07/090,982 external-priority patent/US4893347A/en
Application filed by Motorola Inc filed Critical Motorola Inc
Publication of BR8707993A publication Critical patent/BR8707993A/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/65—Arrangements characterised by transmission systems for broadcast
    • H04H20/67—Common-wave systems, i.e. using separate transmitters operating on substantially the same frequency
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3052—Automatic control in amplifiers having semiconductor devices in bandpass amplifiers (H.F. or I.F.) or in frequency-changers used in a (super)heterodyne receiver
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/34—Muting amplifier when no signal is present or when only weak signals are present, or caused by the presence of noise signals, e.g. squelch systems
    • H03G3/344—Muting responsive to the amount of noise (noise squelch)
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • H04B1/1027—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Noise Elimination (AREA)
BR8707993A 1987-08-28 1987-12-24 F.M REPEATER COMMUNICATION SYSTEM AND F.M RECEIVER BR8707993A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US07/090,982 US4893347A (en) 1986-04-03 1987-08-28 FM communication system with improved response to Rayleigh-faded companded signals
US07/091,160 US4893349A (en) 1986-04-03 1987-08-28 FM communication system with improved response to rayleigh-faded received signals
PCT/US1987/003420 WO1989002198A1 (en) 1987-08-28 1987-12-24 Fm communications system with improved response to rayleigh-faded received signals

Publications (1)

Publication Number Publication Date
BR8707993A true BR8707993A (en) 1990-05-22

Family

ID=26782844

Family Applications (1)

Application Number Title Priority Date Filing Date
BR8707993A BR8707993A (en) 1987-08-28 1987-12-24 F.M REPEATER COMMUNICATION SYSTEM AND F.M RECEIVER

Country Status (7)

Country Link
EP (1) EP0380475A4 (en)
JP (1) JP2660858B2 (en)
KR (1) KR960011122B1 (en)
BR (1) BR8707993A (en)
FI (1) FI900722A0 (en)
MX (1) MX161741A (en)
WO (1) WO1989002198A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3936888C1 (en) * 1989-11-06 1991-05-23 Stabo Elektronik Gmbh & Co Kg, 3200 Hildesheim, De
EP0691050B1 (en) * 1993-03-24 1996-12-18 Blaupunkt-Werke GmbH Circuit for deriving audio signal masking signals
EP1249734B1 (en) * 2001-04-11 2012-04-18 Fujitsu Semiconductor Limited Rectangle/lattice data conversion method for charged particle beam exposure mask pattern and charged particle beam exposure method
CN102027675B (en) * 2008-05-15 2015-03-25 奥普蒂斯蜂窝技术有限责任公司 WCDMA AGC receiver SNR adjustment and signalling

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4123711A (en) * 1977-01-24 1978-10-31 Canadian Patents And Development Limited Synchronized compressor and expander voice processing system for radio telephone
DE2909520C3 (en) * 1979-03-10 1981-12-03 Philips Patentverwaltung Gmbh, 2000 Hamburg Circuit arrangement for attenuating background noises
JPS5646352U (en) * 1979-09-17 1981-04-25
JPS5742240A (en) * 1980-08-28 1982-03-09 Nec Corp Squeltch circuit
US4403348A (en) * 1981-09-21 1983-09-06 Bell Telephone Laboratories, Incorporated Single sideband receiver with intersyllabic gain correction limit control
DE3343224A1 (en) * 1983-11-30 1985-06-05 Telefunken Fernseh Und Rundfunk Gmbh, 3000 Hannover Broadcast radio receiving device
NL8402321A (en) * 1984-07-23 1986-02-17 Philips Nv FAULT DETECTOR.

Also Published As

Publication number Publication date
EP0380475A4 (en) 1991-09-25
WO1989002198A1 (en) 1989-03-09
KR890702342A (en) 1989-12-23
KR960011122B1 (en) 1996-08-20
JPH02502418A (en) 1990-08-02
FI900722A0 (en) 1990-02-14
JP2660858B2 (en) 1997-10-08
EP0380475A1 (en) 1990-08-08
MX161741A (en) 1990-12-20

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Legal Events

Date Code Title Description
B21A Expiry acc. art. 78, item i of ipl- expiry of the term of protection

Free format text: PATENTE EXTINTA EM 24/12/2002