BR9808269A - Rádio receptor, processador de sinal, e, método de processamento de sinal - Google Patents
Rádio receptor, processador de sinal, e, método de processamento de sinalInfo
- Publication number
- BR9808269A BR9808269A BR9808269-8A BR9808269A BR9808269A BR 9808269 A BR9808269 A BR 9808269A BR 9808269 A BR9808269 A BR 9808269A BR 9808269 A BR9808269 A BR 9808269A
- Authority
- BR
- Brazil
- Prior art keywords
- click
- signal
- desired signal
- noise
- detected
- 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
- H04B1/1081—Reduction of multipath noise
-
- 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
- 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
- H04B1/16—Circuits
- H04B1/1646—Circuits adapted for the reception of stereophonic signals
- H04B1/1661—Reduction of noise by manipulation of the baseband composite stereophonic signal or the decoded left and right channels
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Noise Elimination (AREA)
Abstract
<B>"RáDIO RECEPTOR, PROCESSADOR DE SINAL, E, MéTODO DE PROCESSAMENTO DE SINAL"<D>. Estes e outros objetos da presente invenção são obtidos usando um Filtro Multi-Caminho Adaptativo (AMPF) que ruído de estalido audivelmente objecionável gerado na saída de um discriminador de FM para evitar distorção audível ou outra corrupção do sinal desejado que pode incluir voz e dados de baixa velocidade digitais. Os estalidos são detectados na saída do discriminador usando um filtro casado de ruído colorido projetado e adaptado para a assinatura/forma do estalido bem como para as características do sinal desejado. A saída do filtro casado de ruído colorido é então comparada a um limiar adaptativo. Quando o limiar é excedido, um estalido é registrado como detectado. A duração do estalido é então estimada. Uma estimativa do silnal desejado é gerada e substitui a estimativa de silnal de dados recebida originalmente dentro da região de duração do estalido. Usando as características do sinal desejado exatamente antes e depois do ruído de estalido detectado, o filtro adaptativo estima precisamente os parâmetros do sinal desejado de tal modo que o silnal de substituição modela justamente o que o sinal desejado pareceria se o estalido não ocorresse. Deste modo, uma porção substancial do silnal desejado é preservada.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/818,284 US6032048A (en) | 1997-03-17 | 1997-03-17 | Method and apparatus for compensating for click noise in an FM receiver |
PCT/US1998/004733 WO1998042081A1 (en) | 1997-03-17 | 1998-03-12 | Method and apparatus for compensating for click noise in an fm receiver |
Publications (1)
Publication Number | Publication Date |
---|---|
BR9808269A true BR9808269A (pt) | 2000-05-16 |
Family
ID=25225151
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BR9808269-8A BR9808269A (pt) | 1997-03-17 | 1998-03-12 | Rádio receptor, processador de sinal, e, método de processamento de sinal |
Country Status (7)
Country | Link |
---|---|
US (1) | US6032048A (pt) |
CN (1) | CN1256811A (pt) |
AU (1) | AU6697298A (pt) |
BR (1) | BR9808269A (pt) |
CA (1) | CA2284129A1 (pt) |
GB (1) | GB2339650A (pt) |
WO (1) | WO1998042081A1 (pt) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6134665A (en) * | 1998-01-20 | 2000-10-17 | Digital Equipment Corporation | Computer with remote wake up and transmission of a status packet when the computer fails a self test |
US6377590B1 (en) * | 1998-06-01 | 2002-04-23 | Motorola, Inc. | Apparatus and method for adaptive delay mitigation of voice communication |
US6625233B1 (en) * | 1999-09-29 | 2003-09-23 | Motorola, Inc. | Method and apparatus in a wireless receiver for demodulating a continuous-phase frequency-shift-keyed signal |
DE10130233A1 (de) * | 2001-06-22 | 2003-01-02 | Bosch Gmbh Robert | Verfahren zur Störverdeckung bei digitaler Audiosignalübertragung |
US7272368B2 (en) * | 2001-10-06 | 2007-09-18 | Patrick Owen Devaney | System and method for reduced deviation time domain FM/PM discriminator to achieve a reduced bandwidth frequency or phase modulation communications channels |
TW200400701A (en) * | 2002-04-26 | 2004-01-01 | Niigata Seimitsu Co Ltd | Radio receiver |
EP1661125B1 (en) * | 2003-08-18 | 2007-08-08 | Koninklijke Philips Electronics N.V. | Clicking noise detection in a digital audio signal |
EP2088786A1 (en) * | 2008-02-06 | 2009-08-12 | Sony Corporation | Method and receiver for demodulation |
WO2010054263A2 (en) * | 2008-11-07 | 2010-05-14 | Viasat, Inc. | Dual conversion transmitter with single local oscillator |
CN101582160B (zh) * | 2009-06-18 | 2013-09-18 | 北京中星微电子有限公司 | 前景检测方法和装置以及自适应阈值调节方法和装置 |
US9654128B2 (en) | 2010-01-05 | 2017-05-16 | Syntropy Systems, Llc | Multi-mode sampling/quantization converters |
EP2487801B1 (en) | 2011-02-10 | 2018-09-05 | Nxp B.V. | Method and apparatus for reducing or removing click noise |
EP2582058B1 (en) * | 2011-10-10 | 2016-03-30 | ST-Ericsson SA | Interference mitigating method |
CN104753546B (zh) * | 2013-12-31 | 2017-06-23 | 鸿富锦精密工业(深圳)有限公司 | 消除移动装置干扰信号的方法以及电子设备 |
US9391656B2 (en) * | 2014-08-11 | 2016-07-12 | Syntropy Systems, Llc | Distributed noise shaping apparatus |
CN111316355A (zh) * | 2017-11-03 | 2020-06-19 | 深圳传音通讯有限公司 | 音频降噪方法、降噪装置、移动终端及可读存储介质 |
US11251821B1 (en) | 2021-04-30 | 2022-02-15 | Rockwell Collins, Inc. | Click noise excision |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3668702A (en) * | 1970-10-30 | 1972-06-06 | Itt | Adaptive matched filter for radar signal detector in the presence of colored noise |
JPS57196631A (en) * | 1981-05-28 | 1982-12-02 | Sanyo Electric Co Ltd | Detecting circuit for pulse noise |
DE3446529A1 (de) * | 1984-12-20 | 1986-07-03 | Blaupunkt-Werke Gmbh, 3200 Hildesheim | Verfahren zur stoerverminderung in einer rundfunk-empfangsanlage |
JPS6237456U (pt) * | 1985-08-23 | 1987-03-05 | ||
ATE79495T1 (de) * | 1986-04-03 | 1992-08-15 | Motorola Inc | Ukw-empfaenger mit rauschunterdrueckung beim empfang von signalen mit ''raleigh''¨berblendung. |
US4955083A (en) * | 1986-10-31 | 1990-09-04 | Motorola, Inc. | Dual mode radio transceiver for an SSB communication system |
JPH0750861B2 (ja) * | 1988-08-10 | 1995-05-31 | パイオニア株式会社 | Fm受信機のパルス性ノイズ抑圧装置 |
US4922549A (en) * | 1988-10-27 | 1990-05-01 | Motorola, Inc. | Digital FM squelch detector |
US5170489A (en) * | 1988-11-30 | 1992-12-08 | Ellis Glazebrook | Noise blanker with continuous wave interference compensation |
US4965854A (en) * | 1988-11-30 | 1990-10-23 | General Electric Company | Noise blanker with continuous wave interference compensation |
GB2234354B (en) * | 1989-07-05 | 1993-05-05 | Marconi Co Ltd | Radio communication apparatus |
US5214391A (en) * | 1989-12-06 | 1993-05-25 | Kabushiki Kaisha Toshiba | Demodulation apparatus having multipath detector for selecting a first or second demodulator |
US5054078A (en) * | 1990-03-05 | 1991-10-01 | Motorola, Inc. | Method and apparatus to suspend speech |
EP0450128B1 (de) * | 1990-04-06 | 1995-07-26 | Deutsche ITT Industries GmbH | Verfahren zur aktiven Störungsunterdrückung bei Stereo-Multiplex-Signalen |
JPH04134929A (ja) * | 1990-09-26 | 1992-05-08 | Pioneer Electron Corp | マルチパス検出器 |
US5249233A (en) * | 1992-04-06 | 1993-09-28 | Ford Motor Company | Multipath noise minimizer for radio receiver |
DE69315381T2 (de) * | 1992-05-22 | 1998-06-18 | Advanced Micro Devices Inc | Unterscheidung und Unterdrückung des Geräusches in einem Kommunikationssignal |
CA2137459A1 (en) * | 1993-05-04 | 1994-11-10 | Stephen V. Cahill | Apparatus and method for substantially eliminating noise in an audible output signal |
US5794136A (en) * | 1996-09-24 | 1998-08-11 | Motorola, Inc. | Noise blanker and a radio receiver and method employing same |
US6771721B1 (en) * | 1997-06-20 | 2004-08-03 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for eliminating audio clicks in a radio receiver |
-
1997
- 1997-03-17 US US08/818,284 patent/US6032048A/en not_active Expired - Lifetime
-
1998
- 1998-03-12 CA CA002284129A patent/CA2284129A1/en not_active Abandoned
- 1998-03-12 BR BR9808269-8A patent/BR9808269A/pt not_active Application Discontinuation
- 1998-03-12 WO PCT/US1998/004733 patent/WO1998042081A1/en active Application Filing
- 1998-03-12 CN CN98805165A patent/CN1256811A/zh active Pending
- 1998-03-12 AU AU66972/98A patent/AU6697298A/en not_active Abandoned
- 1998-03-12 GB GB9921597A patent/GB2339650A/en not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
CA2284129A1 (en) | 1998-09-24 |
AU6697298A (en) | 1998-10-12 |
WO1998042081A1 (en) | 1998-09-24 |
GB2339650A (en) | 2000-02-02 |
CN1256811A (zh) | 2000-06-14 |
US6032048A (en) | 2000-02-29 |
GB9921597D0 (en) | 1999-11-17 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FA10 | Dismissal: dismissal - article 33 of industrial property law | ||
B11Y | Definitive dismissal acc. article 33 of ipl - extension of time limit for request of examination expired |