HK104995A - Fm receiver with noise suppression during rayleigh faded received signals - Google Patents
Fm receiver with noise suppression during rayleigh faded received signalsInfo
- Publication number
- HK104995A HK104995A HK104995A HK104995A HK104995A HK 104995 A HK104995 A HK 104995A HK 104995 A HK104995 A HK 104995A HK 104995 A HK104995 A HK 104995A HK 104995 A HK104995 A HK 104995A
- Authority
- HK
- Hong Kong
- Prior art keywords
- receiver
- noise
- attenuation
- received signals
- audio
- Prior art date
Links
- 230000001629 suppression Effects 0.000 title 1
- 230000002238 attenuated effect Effects 0.000 abstract 1
- 230000005236 sound signal Effects 0.000 abstract 1
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)
- Stereo-Broadcasting Methods (AREA)
- Oscillators With Electromechanical Resonators (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US84796286A | 1986-04-03 | 1986-04-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
HK104995A true HK104995A (en) | 1995-07-07 |
Family
ID=25301963
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
HK104995A HK104995A (en) | 1986-04-03 | 1995-06-29 | Fm receiver with noise suppression during rayleigh faded received signals |
Country Status (13)
Country | Link |
---|---|
US (2) | US4893347A (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) |
Families Citing this family (77)
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FR2623672A1 (fr) * | 1987-11-19 | 1989-05-26 | Alcatel Thomson Radiotelephone | Dispositif d'amelioration du confort d'ecoute par suppression des phenomenes transitoires dans une chaine de reception d'un equipement fm/pm a bande etroite, notamment en radiotelephonie |
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US5065451A (en) * | 1989-06-09 | 1991-11-12 | Amaf Industries, Inc. | System and method of frequency calibration in a linked compression-expansion (lincompex) system |
IT1230401B (it) * | 1989-06-15 | 1991-10-21 | Italtel Spa | Ricevitore a conversione diretta per segnali numerici e metodo per la demodulazione di tali segnali. |
US5058202A (en) * | 1989-08-25 | 1991-10-15 | Amaf Industries, Inc. | System and method of transmitting and receiving a licompex modulated signal over a communication channel utilizing frequency modulation techniques |
US5226178A (en) * | 1989-11-01 | 1993-07-06 | Motorola, Inc. | Compatible noise reduction system |
US5249174A (en) * | 1990-03-06 | 1993-09-28 | Iwatsu Electric Co., Ltd. | Time-division communication method for mobile bodies and system using said method |
US5131399A (en) * | 1990-08-06 | 1992-07-21 | Sciarra Michael J | Patient monitoring apparatus and method |
US5287556A (en) * | 1990-09-28 | 1994-02-15 | Motorola, Inc. | Interference reduction using an adaptive receiver filter, signal strength, and BER sensing |
US5083304A (en) * | 1990-09-28 | 1992-01-21 | Motorola, Inc. | Automatic gain control apparatus and method |
US5170495A (en) * | 1990-10-31 | 1992-12-08 | Northern Telecom Limited | Controlling clipping in a microwave power amplifier |
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JPH07273840A (ja) * | 1994-03-25 | 1995-10-20 | Nec Corp | 音声帯域制御機能を有する移動電話機 |
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US6771721B1 (en) | 1997-06-20 | 2004-08-03 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for eliminating audio clicks in a radio receiver |
JP3233880B2 (ja) * | 1997-08-21 | 2001-12-04 | 沖電気工業株式会社 | 周波数変調信号送信機 |
US5970394A (en) * | 1997-10-24 | 1999-10-19 | Internet Mobility Corporation | Method of detecting damaged cellular telephone facilities |
JPH11154882A (ja) * | 1997-11-21 | 1999-06-08 | Hitachi Denshi Ltd | 無線機 |
JP3224368B2 (ja) | 1998-05-29 | 2001-10-29 | 沖電気工業株式会社 | 無線受信機 |
US6052566A (en) * | 1998-06-26 | 2000-04-18 | Lucent Technologies Inc. | Combined RSSI/SNR-driven intermodulation-mitigation scheme for CDMA terminals |
US6233440B1 (en) * | 1998-08-05 | 2001-05-15 | Triquint Semiconductor, Inc. | RF power amplifier with variable bias current |
KR100303795B1 (ko) * | 1998-08-07 | 2001-09-24 | 윤종용 | 송신신호 이득 제어방법 |
EP1052832A1 (en) * | 1999-05-14 | 2000-11-15 | STMicroelectronics S.r.l. | Receiving section of a telephone |
DE60022739D1 (de) * | 2000-04-07 | 2005-10-27 | Motorola Inc | Empfänger mit Audiostummschalter gesteuert durch Feldstärkenanlyse |
US6909879B1 (en) * | 2000-08-22 | 2005-06-21 | Cellco Partnership | Methods and apparatus for utilizing radio frequency spectrum simultaneously and concurrently in the presence of co-channel and/or adjacent channel television signals |
EP1213832A1 (en) * | 2000-12-05 | 2002-06-12 | Semiconductor Ideas to The Market (ItoM) BV | AM receiver with audio filtering means |
DE10064493A1 (de) * | 2000-12-22 | 2002-06-27 | Bosch Gmbh Robert | Verfahren zur Unterdrückung von Störspitzen in einem Nutzsignal |
KR100414371B1 (ko) * | 2001-07-25 | 2004-01-07 | 엘지전자 주식회사 | 자동이득조정전압을 이용한 수신기의 동작범위 제어장치및 그 방법 |
TW557633B (en) * | 2001-10-30 | 2003-10-11 | Faraday Tech Corp | Noise-reduction circuit capable of adjusting input level |
EP1317064A1 (en) * | 2001-11-28 | 2003-06-04 | TTPCOM Limited | Transmitter RF power control |
AU2003276579A1 (en) * | 2002-12-16 | 2004-07-09 | Koninklijke Philips Electronics N.V. | Noise suppression in an fm receiver |
JP2005094502A (ja) * | 2003-09-18 | 2005-04-07 | Matsushita Electric Ind Co Ltd | 受信回路 |
JP4282524B2 (ja) * | 2004-03-30 | 2009-06-24 | 三洋電機株式会社 | Am受信回路 |
DE102004021867B4 (de) * | 2004-05-04 | 2012-02-16 | Infineon Technologies Ag | Verfahren zur Signalverarbeitung, insbesondere in einem Hochfrequenzempfänger und Signalaufbereitungsschaltung |
JP2006270874A (ja) * | 2005-03-25 | 2006-10-05 | Nec Corp | 電力クリッピング回路 |
US20090147891A1 (en) * | 2005-10-25 | 2009-06-11 | Hiroki Furukawa | Audio signal demodulation apparatus |
US8311048B2 (en) * | 2008-05-09 | 2012-11-13 | Roundbox, Inc. | Datacasting system with intermittent listener capability |
JP4683558B2 (ja) * | 2006-05-30 | 2011-05-18 | パイオニア株式会社 | ミュート回路 |
MX2009001087A (es) * | 2006-08-04 | 2009-04-28 | Jps Communications Inc | Reconocimiento de modulacion de voz en un adaptador de radio a sip. |
GB0624982D0 (en) * | 2006-12-14 | 2007-01-24 | Cambridge Silicon Radio Ltd | FM signal quality measurement |
TWI325225B (en) * | 2006-12-19 | 2010-05-21 | Qisda Corp | Audio signal output circuit capable of decreasing pop noise |
US20080162119A1 (en) * | 2007-01-03 | 2008-07-03 | Lenhardt Martin L | Discourse Non-Speech Sound Identification and Elimination |
US8165475B2 (en) * | 2007-05-24 | 2012-04-24 | Applied Optoelectronics | Systems and methods for reducing clipping in multichannel modulated optical systems |
US20090192793A1 (en) * | 2008-01-30 | 2009-07-30 | Desmond Arthur Smith | Method for instantaneous peak level management and speech clarity enhancement |
AU2009267047A1 (en) * | 2008-06-30 | 2010-01-07 | Able Planet, Incorporated | Method and system for auditory enhancement and hearing conservation |
US9324337B2 (en) * | 2009-11-17 | 2016-04-26 | Dolby Laboratories Licensing Corporation | Method and system for dialog enhancement |
US20120034895A1 (en) * | 2010-08-03 | 2012-02-09 | Quintic Holdings | Circuit and Method for Peak Detection with Hysteresis |
US9275690B2 (en) | 2012-05-30 | 2016-03-01 | Tahoe Rf Semiconductor, Inc. | Power management in an electronic system through reducing energy usage of a battery and/or controlling an output power of an amplifier thereof |
US9509351B2 (en) | 2012-07-27 | 2016-11-29 | Tahoe Rf Semiconductor, Inc. | Simultaneous accommodation of a low power signal and an interfering signal in a radio frequency (RF) receiver |
US9184498B2 (en) | 2013-03-15 | 2015-11-10 | Gigoptix, Inc. | Extending beamforming capability of a coupled voltage controlled oscillator (VCO) array during local oscillator (LO) signal generation through fine control of a tunable frequency of a tank circuit of a VCO thereof |
US9666942B2 (en) | 2013-03-15 | 2017-05-30 | Gigpeak, Inc. | Adaptive transmit array for beam-steering |
US9780449B2 (en) | 2013-03-15 | 2017-10-03 | Integrated Device Technology, Inc. | Phase shift based improved reference input frequency signal injection into a coupled voltage controlled oscillator (VCO) array during local oscillator (LO) signal generation to reduce a phase-steering requirement during beamforming |
US9716315B2 (en) | 2013-03-15 | 2017-07-25 | Gigpeak, Inc. | Automatic high-resolution adaptive beam-steering |
US9722310B2 (en) | 2013-03-15 | 2017-08-01 | Gigpeak, Inc. | Extending beamforming capability of a coupled voltage controlled oscillator (VCO) array during local oscillator (LO) signal generation through frequency multiplication |
US9531070B2 (en) | 2013-03-15 | 2016-12-27 | Christopher T. Schiller | Extending beamforming capability of a coupled voltage controlled oscillator (VCO) array during local oscillator (LO) signal generation through accommodating differential coupling between VCOs thereof |
US9837714B2 (en) | 2013-03-15 | 2017-12-05 | Integrated Device Technology, Inc. | Extending beamforming capability of a coupled voltage controlled oscillator (VCO) array during local oscillator (LO) signal generation through a circular configuration thereof |
RU2626662C1 (ru) * | 2016-06-21 | 2017-07-31 | Федеральное государственное казенное военное образовательное учреждение высшего образования "Военный учебно-научный центр Военно-воздушных сил "Военно-воздушная академия имени профессора Н.Е. Жуковского и Ю.А. Гагарина" (г. Воронеж) Министерства обороны Российской Федерации | Способ обработки сигналов в тракте высокой частоты радиоприемных устройств |
Family Cites Families (31)
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DE657528C (de) * | 1938-03-07 | Marconi Wireless Telegraph Co | Empfaenger mit selbsttaetiger Schwundregelung | |
DE657C (de) * | 1877-07-30 | G, WUPPERMANN in Barmen | Vorrichtung an Flechtmaschinen zur beliebigen Trennung und Vereinigung mehrerer Partialgänge | |
US2263683A (en) * | 1936-08-28 | 1941-11-25 | Crosley Corp | Expander and limiter circuits |
US3036211A (en) * | 1960-05-05 | 1962-05-22 | Collins Radio Co | Noise controlled variable a.v.c. delay circuit |
US3568068A (en) * | 1967-10-13 | 1971-03-02 | Motorola Inc | Squelch circuit for frequency modulation receiver |
JPS5213704B2 (xx) * | 1971-11-15 | 1977-04-16 | ||
US3832628A (en) * | 1972-12-08 | 1974-08-27 | Prod Measurements Corp | Engine timer |
JPS5713176B2 (xx) * | 1974-05-01 | 1982-03-16 | ||
US4013964A (en) * | 1975-10-22 | 1977-03-22 | Motorola, Inc. | Automatic gain control means for a single sideband radio receiver |
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NL184594C (nl) * | 1979-09-04 | 1989-09-01 | Philips Nv | Radio-ontvanger voorzien van een frequentie gesleutelde lus met audiofrequente terugkoppeling, en een stomschakeling. |
JPS5646352U (xx) * | 1979-09-17 | 1981-04-25 | ||
DE3008076C2 (de) * | 1980-03-03 | 1982-05-06 | Siemens AG, 1000 Berlin und 8000 München | Einrichtung zur Empfängerabschaltung bei kleinem Signal-Geräusch-Abstand für ein digital moduliertes Funksystem mit Frequenzmodulation |
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US4398158A (en) * | 1980-11-24 | 1983-08-09 | Micmix Audio Products, Inc. | Dynamic range expander |
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US4514703A (en) * | 1982-12-20 | 1985-04-30 | Motrola, Inc. | Automatic level control system |
US4580286A (en) * | 1984-03-26 | 1986-04-01 | Sprague Electric Company | Noise activated mute for FM reception in an AM/FM radio receiver |
NL8402321A (nl) * | 1984-07-23 | 1986-02-17 | Philips Nv | Storingsdetektor. |
JPS61109310A (ja) * | 1984-11-02 | 1986-05-27 | Nec Corp | 中間周波増幅器 |
-
1986
- 1986-11-03 JP JP61506075A patent/JP2784514B2/ja not_active Expired - Fee Related
- 1986-11-03 SG SG1995905998A patent/SG28380G/en unknown
- 1986-11-03 WO PCT/US1986/002388 patent/WO1987006072A1/en active IP Right Grant
- 1986-11-03 AT AT86907126T patent/ATE79495T1/de active
- 1986-11-03 EP EP86907126A patent/EP0298959B1/en not_active Expired - Lifetime
- 1986-11-03 DE DE8686907126T patent/DE3686421T2/de not_active Expired - Fee Related
- 1986-11-03 AU AU66231/86A patent/AU596134B2/en not_active Ceased
-
1987
- 1987-08-28 US US07/090,982 patent/US4893347A/en not_active Expired - Lifetime
- 1987-08-28 US US07/091,160 patent/US4893349A/en not_active Expired - Lifetime
- 1987-11-27 NO NO87874915A patent/NO170376C/no unknown
- 1987-12-02 DK DK632287A patent/DK170318B1/da not_active IP Right Cessation
- 1987-12-03 KR KR87701139A patent/KR950012945B1/ko not_active IP Right Cessation
-
1988
- 1988-09-16 FI FI884273A patent/FI88089C/fi not_active IP Right Cessation
-
1995
- 1995-06-29 HK HK104995A patent/HK104995A/xx not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
ATE79495T1 (de) | 1992-08-15 |
WO1987006072A1 (en) | 1987-10-08 |
JPH01500788A (ja) | 1989-03-16 |
JP2784514B2 (ja) | 1998-08-06 |
EP0298959A1 (en) | 1989-01-18 |
DK632287A (da) | 1987-12-02 |
KR950012945B1 (en) | 1995-10-23 |
US4893349A (en) | 1990-01-09 |
NO874915L (no) | 1987-11-26 |
SG28380G (en) | 1995-09-01 |
FI884273A (fi) | 1988-09-16 |
NO170376B (no) | 1992-06-29 |
DK632287D0 (da) | 1987-12-02 |
AU6623186A (en) | 1987-10-20 |
FI88089C (fi) | 1993-03-25 |
NO874915D0 (no) | 1987-11-26 |
EP0298959B1 (en) | 1992-08-12 |
NO170376C (no) | 1992-10-07 |
DE3686421T2 (de) | 1993-01-28 |
DK170318B1 (da) | 1995-07-31 |
US4893347A (en) | 1990-01-09 |
AU596134B2 (en) | 1990-04-26 |
KR880701492A (ko) | 1988-07-27 |
FI884273A0 (fi) | 1988-09-16 |
FI88089B (fi) | 1992-12-15 |
DE3686421D1 (de) | 1992-09-17 |
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