BR8707993A - F.M REPEATER COMMUNICATION SYSTEM AND F.M RECEIVER - Google Patents
F.M REPEATER COMMUNICATION SYSTEM AND F.M RECEIVERInfo
- 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
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)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/091,160 US4893349A (en) | 1986-04-03 | 1987-08-28 | FM communication system with improved response to rayleigh-faded received signals |
US07/090,982 US4893347A (en) | 1986-04-03 | 1987-08-28 | FM communication system with improved response to Rayleigh-faded companded 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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3936888C1 (en) * | 1989-11-06 | 1991-05-23 | Stabo Elektronik Gmbh & Co Kg, 3200 Hildesheim, De | |
US5661810A (en) * | 1993-03-24 | 1997-08-26 | Robert Bosch Gmbh | Circuit arrangement for deriving signals for masking audio 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 |
WO2009138125A1 (en) * | 2008-05-15 | 2009-11-19 | Telefonaktiebolaget Lm Ericsson (Publ) | Wcdma agc receiver snr adjustment and signalling |
Family Cites Families (7)
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. |
-
1987
- 1987-11-03 MX MX9122A patent/MX161741A/en unknown
- 1987-12-24 KR KR1019890700734A patent/KR960011122B1/en not_active IP Right Cessation
- 1987-12-24 EP EP19880900985 patent/EP0380475A4/en not_active Withdrawn
- 1987-12-24 JP JP63501253A patent/JP2660858B2/en not_active Expired - Fee Related
- 1987-12-24 WO PCT/US1987/003420 patent/WO1989002198A1/en not_active Application Discontinuation
- 1987-12-24 BR BR8707993A patent/BR8707993A/en not_active IP Right Cessation
-
1990
- 1990-02-14 FI FI900722A patent/FI900722A0/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
EP0380475A4 (en) | 1991-09-25 |
WO1989002198A1 (en) | 1989-03-09 |
JPH02502418A (en) | 1990-08-02 |
MX161741A (en) | 1990-12-20 |
FI900722A0 (en) | 1990-02-14 |
KR960011122B1 (en) | 1996-08-20 |
KR890702342A (en) | 1989-12-23 |
EP0380475A1 (en) | 1990-08-08 |
JP2660858B2 (en) | 1997-10-08 |
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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 |