DE3686421D1 - Ukw-empfaenger mit rauschunterdrueckung beim empfang von signalen mit "raleigh"-ueberblendung. - Google Patents

Ukw-empfaenger mit rauschunterdrueckung beim empfang von signalen mit "raleigh"-ueberblendung.

Info

Publication number
DE3686421D1
DE3686421D1 DE8686907126T DE3686421T DE3686421D1 DE 3686421 D1 DE3686421 D1 DE 3686421D1 DE 8686907126 T DE8686907126 T DE 8686907126T DE 3686421 T DE3686421 T DE 3686421T DE 3686421 D1 DE3686421 D1 DE 3686421D1
Authority
DE
Germany
Prior art keywords
receiver
noise
noise reduction
attenuation
audio
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 - Lifetime
Application number
DE8686907126T
Other languages
English (en)
Other versions
DE3686421T2 (de
Inventor
C Eastmond
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.)
Motorola Solutions Inc
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
Application filed by Motorola Inc filed Critical Motorola Inc
Application granted granted Critical
Publication of DE3686421D1 publication Critical patent/DE3686421D1/de
Publication of DE3686421T2 publication Critical patent/DE3686421T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
    • H03G3/20—Automatic control
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
    • 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 without distortion of the input signal
    • 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
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
    • 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
    • H03G3/345—Muting during a short period of time when noise pulses are detected, i.e. blanking
    • 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
    • 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
DE8686907126T 1986-04-03 1986-11-03 Ukw-empfaenger mit rauschunterdrueckung beim empfang von signalen mit "raleigh"-ueberblendung. Expired - Fee Related DE3686421T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US84796286A 1986-04-03 1986-04-03
PCT/US1986/002388 WO1987006072A1 (en) 1986-04-03 1986-11-03 Fm receiver with noise suppression during rayleigh faded received signals

Publications (2)

Publication Number Publication Date
DE3686421D1 true DE3686421D1 (de) 1992-09-17
DE3686421T2 DE3686421T2 (de) 1993-01-28

Family

ID=25301963

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8686907126T Expired - Fee Related DE3686421T2 (de) 1986-04-03 1986-11-03 Ukw-empfaenger mit rauschunterdrueckung beim empfang von signalen mit "raleigh"-ueberblendung.

Country Status (13)

Country Link
US (2) US4893347A (de)
EP (1) EP0298959B1 (de)
JP (1) JP2784514B2 (de)
KR (1) KR950012945B1 (de)
AT (1) ATE79495T1 (de)
AU (1) AU596134B2 (de)
DE (1) DE3686421T2 (de)
DK (1) DK170318B1 (de)
FI (1) FI88089C (de)
HK (1) HK104995A (de)
NO (1) NO170376C (de)
SG (1) SG28380G (de)
WO (1) WO1987006072A1 (de)

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Also Published As

Publication number Publication date
JP2784514B2 (ja) 1998-08-06
NO874915L (no) 1987-11-26
DK632287D0 (da) 1987-12-02
HK104995A (en) 1995-07-07
EP0298959A1 (de) 1989-01-18
FI884273A (fi) 1988-09-16
FI884273A0 (fi) 1988-09-16
SG28380G (en) 1995-09-01
JPH01500788A (ja) 1989-03-16
DK632287A (da) 1987-12-02
FI88089B (fi) 1992-12-15
NO170376B (no) 1992-06-29
US4893349A (en) 1990-01-09
WO1987006072A1 (en) 1987-10-08
EP0298959B1 (de) 1992-08-12
KR950012945B1 (en) 1995-10-23
AU596134B2 (en) 1990-04-26
FI88089C (fi) 1993-03-25
NO170376C (no) 1992-10-07
NO874915D0 (no) 1987-11-26
DE3686421T2 (de) 1993-01-28
US4893347A (en) 1990-01-09
ATE79495T1 (de) 1992-08-15
AU6623186A (en) 1987-10-20
KR880701492A (ko) 1988-07-27
DK170318B1 (da) 1995-07-31

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8364 No opposition during term of opposition
8320 Willingness to grant licences declared (paragraph 23)
8339 Ceased/non-payment of the annual fee