JP4916974B2 - Fmチューナ - Google Patents
Fmチューナ Download PDFInfo
- Publication number
- JP4916974B2 JP4916974B2 JP2007202707A JP2007202707A JP4916974B2 JP 4916974 B2 JP4916974 B2 JP 4916974B2 JP 2007202707 A JP2007202707 A JP 2007202707A JP 2007202707 A JP2007202707 A JP 2007202707A JP 4916974 B2 JP4916974 B2 JP 4916974B2
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- JP
- Japan
- Prior art keywords
- signal
- circuit
- multipath
- reception
- interference
- 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 - Fee Related
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- 238000001514 detection method Methods 0.000 claims description 54
- 238000000926 separation method Methods 0.000 claims description 32
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- 238000010586 diagram Methods 0.000 description 6
- 238000009499 grossing Methods 0.000 description 6
- 101100339482 Colletotrichum orbiculare (strain 104-T / ATCC 96160 / CBS 514.97 / LARS 414 / MAFF 240422) HOG1 gene Proteins 0.000 description 5
- 239000013078 crystal Substances 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 4
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- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 101000995861 Arabidopsis thaliana Regulatory protein NPR1 Proteins 0.000 description 2
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- 102100023073 Calcium-activated potassium channel subunit alpha-1 Human genes 0.000 description 1
- 101710189782 Calcium-activated potassium channel subunit alpha-1 Proteins 0.000 description 1
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Images
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
- H04B1/109—Means associated with receiver for limiting or suppressing noise or interference by improving strong signal performance of the receiver when strong unwanted signals are present at the receiver input
-
- 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
- H04B1/10—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
- H04B1/16—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
-
- 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
- H04B2001/1045—Adjacent-channel interference
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Noise Elimination (AREA)
- Circuits Of Receivers In General (AREA)
- Stereo-Broadcasting Methods (AREA)
Description
Claims (1)
- FM受信信号から検波されるステレオ音声信号のステレオ分離度を制御するステレオ分離度制御部と、
前記FM受信信号が有する振幅変動成分からマルチパス受信によるノイズ成分を抽出するマルチパスノイズ成分抽出部と、
前記ノイズ成分に基づいて前記ステレオ分離度制御部に対する制御入力信号を生成し、所定の時定数で平滑化して出力する制御入力生成部と、
前記ノイズ成分のレベルに基づいて、前記マルチパス受信を検出するマルチパス受信検出部と、
前記マルチパス受信検出部による前記マルチパス受信の検出と並行して、前記振幅変動成分から受信目的局に対する隣接信号の干渉を検出する隣接干渉検出部と、
前記マルチパス受信の検出を示す前記マルチパス受信検出部の出力信号と前記隣接信号の干渉の検出を示す前記隣接干渉検出部の出力信号とを利用して受信状態が好適な放送局を自動的に選択するAFサーチを実行するAFサーチ制御部と、
を有し、
前記マルチパス受信検出部は、
前記ノイズ成分のレベルを判定基準電圧と比較し、前記マルチパス受信の発生を判定する比較器と、
前記判定基準電圧を可変設定できる基準電圧発生部と、
を有することを特徴とするFMチューナ。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007202707A JP4916974B2 (ja) | 2007-08-03 | 2007-08-03 | Fmチューナ |
EP08161574A EP2020753B1 (en) | 2007-08-03 | 2008-07-31 | FM tuner |
US12/222,023 US7885628B2 (en) | 2007-08-03 | 2008-07-31 | FM tuner |
CN2008101354154A CN101359920B (zh) | 2007-08-03 | 2008-08-01 | Fm调谐器 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007202707A JP4916974B2 (ja) | 2007-08-03 | 2007-08-03 | Fmチューナ |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2009038700A JP2009038700A (ja) | 2009-02-19 |
JP4916974B2 true JP4916974B2 (ja) | 2012-04-18 |
Family
ID=40039785
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2007202707A Expired - Fee Related JP4916974B2 (ja) | 2007-08-03 | 2007-08-03 | Fmチューナ |
Country Status (4)
Country | Link |
---|---|
US (1) | US7885628B2 (ja) |
EP (1) | EP2020753B1 (ja) |
JP (1) | JP4916974B2 (ja) |
CN (1) | CN101359920B (ja) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010022258A2 (en) * | 2008-08-21 | 2010-02-25 | Intersil Americas Inc. | Noise cancellation for antenna module |
FR2944929B1 (fr) * | 2009-04-23 | 2016-06-24 | Continental Automotive France | Systeme a interface numerique pour la reception et le traitement numerique de signaux radiofrequence et procede associe |
FR2954640B1 (fr) * | 2009-12-23 | 2012-01-20 | Arkamys | Procede d'optimisation de la reception stereo pour radio analogique et recepteur de radio analogique associe |
JP2011172188A (ja) * | 2010-02-22 | 2011-09-01 | On Semiconductor Trading Ltd | ステレオ信号処理回路 |
CN102332282A (zh) * | 2011-07-20 | 2012-01-25 | 深圳市君兰电子有限公司 | 一种dvd模组的性能检测方法及*** |
WO2013057801A1 (ja) * | 2011-10-19 | 2013-04-25 | パイオニア株式会社 | 受信装置、受信方法、受信プログラムおよび受信プログラムを格納した記録媒体 |
US9252899B2 (en) * | 2012-06-26 | 2016-02-02 | Ibiquity Digital Corporation | Adaptive bandwidth management of IBOC audio signals during blending |
CN102843203B (zh) * | 2012-08-13 | 2017-03-15 | 泉州市琪祥电子科技有限公司 | 一种自动静噪电路 |
JP6521826B2 (ja) * | 2015-10-14 | 2019-05-29 | 三菱電機株式会社 | 無線受信装置 |
US10320498B2 (en) * | 2016-06-24 | 2019-06-11 | Mitsubishi Electric Corporation | Radio receiving device |
CN106992791A (zh) * | 2017-03-21 | 2017-07-28 | 合肥极友软件开发有限公司 | 一种抗干扰车载收音机*** |
CN107733544A (zh) * | 2017-11-02 | 2018-02-23 | 深圳市路畅科技股份有限公司 | 一种收音机和一种预设电台发射频率表的获取方法及装置 |
Family Cites Families (29)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3662113A (en) * | 1968-03-27 | 1972-05-09 | Scott Inc H H | Stereophonic demodulator apparatus and automatic monophonic-stereophonic switching circuit |
US4216353A (en) * | 1979-03-27 | 1980-08-05 | Mcintosh Laboratory, Inc. | Adaptive multiplex blend control for stereo decoder to maintain signal to noise ratio |
JPS5646352U (ja) * | 1979-09-17 | 1981-04-25 | ||
US4416024A (en) * | 1979-12-17 | 1983-11-15 | Sanyo Electric Co., Inc. | Distortion reducing circuit in FM receiver |
US5204904A (en) * | 1986-12-01 | 1993-04-20 | Carver Corporation | Apparatus for receiving and processing frequency modulated electromagnetic signals |
JPH0422584Y2 (ja) * | 1987-02-13 | 1992-05-25 | ||
US5202924A (en) * | 1989-12-22 | 1993-04-13 | Allegro Microsystems, Inc. | Stereo FM radio receiver with variable band pass stereo decoder |
JP2983609B2 (ja) * | 1990-10-31 | 1999-11-29 | 三洋電機株式会社 | マルチパスノイズ低減回路 |
US5113446A (en) * | 1990-12-17 | 1992-05-12 | Ford Motor Company | Stereo blend controller for FM receivers |
US5249233A (en) * | 1992-04-06 | 1993-09-28 | Ford Motor Company | Multipath noise minimizer for radio receiver |
EP0691049B1 (de) * | 1993-03-24 | 1997-06-11 | Blaupunkt-Werke GmbH | Verfahren zur ableitung eines von der qualität eines empfangenen multiplexsignals abhängigen qualitätssignals |
DE59409889D1 (de) * | 1993-03-24 | 2001-11-08 | Blaupunkt Werke Gmbh | Rundfunkempfänger mit digitaler signalverarbeitung |
DE4319457C2 (de) * | 1993-06-11 | 1997-09-04 | Blaupunkt Werke Gmbh | Schaltungsanordnung zur Nachbarkanalerkennung und -unterdrückung in einem FM-Rundfunkempfänger |
JP2955497B2 (ja) * | 1995-08-31 | 1999-10-04 | 富士通テン株式会社 | ステレオ受信機 |
DE19540183A1 (de) * | 1995-10-27 | 1997-04-30 | Bosch Gmbh Robert | Stereorundfunkempfänger |
US5701345A (en) * | 1996-03-25 | 1997-12-23 | Delco Electronics Corporation | Multipath interference reduction system and method |
JPH1188207A (ja) * | 1997-09-04 | 1999-03-30 | Kenwood Corp | Fm受信機におけるノイズキャンセラ |
US6295324B1 (en) * | 1997-12-10 | 2001-09-25 | Visteon Global Technologies, Inc. | Signal quality measurement using full-complex FM detector |
US6173166B1 (en) * | 1998-06-29 | 2001-01-09 | Visteon Global Technologies, Inc. | Detection and correction of multipath in an FM receiver |
US6064865A (en) * | 1999-03-01 | 2000-05-16 | Ford Motor Company | Proportional diversity radio receiver system with dynamic noise-controlled antenna phasers |
JP3368879B2 (ja) * | 1999-12-22 | 2003-01-20 | 三菱電機株式会社 | マルチパスノイズ除去装置、オーディオ出力装置およびfm受信機 |
JP3911150B2 (ja) | 2001-11-16 | 2007-05-09 | 松下電器産業株式会社 | Fm受信機 |
JP2004129162A (ja) * | 2002-10-07 | 2004-04-22 | Pioneer Electronic Corp | 受信方法及び受信装置 |
JP4133604B2 (ja) * | 2003-06-10 | 2008-08-13 | アルパイン株式会社 | ラジオ受信機 |
JP4088245B2 (ja) * | 2003-11-26 | 2008-05-21 | アルプス電気株式会社 | Fmチューナ |
JP4444784B2 (ja) * | 2004-10-20 | 2010-03-31 | アルパイン株式会社 | 受信装置および受信方法 |
US8019308B2 (en) | 2006-01-25 | 2011-09-13 | Mitsubishi Electric Corporation | Receiving apparatus |
JP2009081839A (ja) * | 2007-09-04 | 2009-04-16 | Sanyo Electric Co Ltd | Fmチューナ |
JP2009105727A (ja) * | 2007-10-24 | 2009-05-14 | Sanyo Electric Co Ltd | Fm受信機 |
-
2007
- 2007-08-03 JP JP2007202707A patent/JP4916974B2/ja not_active Expired - Fee Related
-
2008
- 2008-07-31 EP EP08161574A patent/EP2020753B1/en not_active Expired - Fee Related
- 2008-07-31 US US12/222,023 patent/US7885628B2/en not_active Expired - Fee Related
- 2008-08-01 CN CN2008101354154A patent/CN101359920B/zh not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
US20090036085A1 (en) | 2009-02-05 |
US7885628B2 (en) | 2011-02-08 |
EP2020753B1 (en) | 2012-11-21 |
JP2009038700A (ja) | 2009-02-19 |
EP2020753A2 (en) | 2009-02-04 |
EP2020753A3 (en) | 2010-01-13 |
CN101359920A (zh) | 2009-02-04 |
CN101359920B (zh) | 2012-09-05 |
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