NO170376C - Fm-mottaker med forbedret mottaking av signaler med rayleigh-fading - Google Patents

Fm-mottaker med forbedret mottaking av signaler med rayleigh-fading

Info

Publication number
NO170376C
NO170376C NO87874915A NO874915A NO170376C NO 170376 C NO170376 C NO 170376C NO 87874915 A NO87874915 A NO 87874915A NO 874915 A NO874915 A NO 874915A NO 170376 C NO170376 C NO 170376C
Authority
NO
Norway
Prior art keywords
receiver
noise
attenuation
rayleigh
audio
Prior art date
Application number
NO87874915A
Other languages
English (en)
Norwegian (no)
Other versions
NO874915L (no
NO170376B (no
NO874915D0 (no
Inventor
Bruce Charles Eastmond
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
Publication of NO874915L publication Critical patent/NO874915L/no
Publication of NO874915D0 publication Critical patent/NO874915D0/no
Application filed by Motorola Inc filed Critical Motorola Inc
Publication of NO170376B publication Critical patent/NO170376B/no
Publication of NO170376C publication Critical patent/NO170376C/no

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • 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
    • 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
    • H03G3/345—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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Noise Elimination (AREA)
  • Circuits Of Receivers In General (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
  • Stereo-Broadcasting Methods (AREA)
NO87874915A 1986-04-03 1987-11-27 Fm-mottaker med forbedret mottaking av signaler med rayleigh-fading NO170376C (no)

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 (4)

Publication Number Publication Date
NO874915L NO874915L (no) 1987-11-26
NO874915D0 NO874915D0 (no) 1987-11-26
NO170376B NO170376B (no) 1992-06-29
NO170376C true NO170376C (no) 1992-10-07

Family

ID=25301963

Family Applications (1)

Application Number Title Priority Date Filing Date
NO87874915A NO170376C (no) 1986-04-03 1987-11-27 Fm-mottaker med forbedret mottaking av signaler med rayleigh-fading

Country Status (13)

Country Link
US (2) US4893349A (xx)
EP (1) EP0298959B1 (xx)
JP (1) JP2784514B2 (xx)
KR (1) KR950012945B1 (xx)
AT (1) ATE79495T1 (xx)
AU (1) AU596134B2 (xx)
DE (1) DE3686421T2 (xx)
DK (1) DK170318B1 (xx)
FI (1) FI88089C (xx)
HK (1) HK104995A (xx)
NO (1) NO170376C (xx)
SG (1) SG28380G (xx)
WO (1) WO1987006072A1 (xx)

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Also Published As

Publication number Publication date
SG28380G (en) 1995-09-01
EP0298959A1 (en) 1989-01-18
NO874915L (no) 1987-11-26
AU596134B2 (en) 1990-04-26
NO170376B (no) 1992-06-29
KR950012945B1 (en) 1995-10-23
JP2784514B2 (ja) 1998-08-06
DK632287A (da) 1987-12-02
DE3686421D1 (de) 1992-09-17
EP0298959B1 (en) 1992-08-12
AU6623186A (en) 1987-10-20
FI884273A (fi) 1988-09-16
ATE79495T1 (de) 1992-08-15
KR880701492A (ko) 1988-07-27
FI884273A0 (fi) 1988-09-16
HK104995A (en) 1995-07-07
FI88089B (fi) 1992-12-15
DE3686421T2 (de) 1993-01-28
NO874915D0 (no) 1987-11-26
DK632287D0 (da) 1987-12-02
DK170318B1 (da) 1995-07-31
FI88089C (fi) 1993-03-25
JPH01500788A (ja) 1989-03-16
WO1987006072A1 (en) 1987-10-08
US4893349A (en) 1990-01-09
US4893347A (en) 1990-01-09

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