JP4869455B2 - ラジオ受信機 - Google Patents
ラジオ受信機 Download PDFInfo
- Publication number
- JP4869455B2 JP4869455B2 JP2011528517A JP2011528517A JP4869455B2 JP 4869455 B2 JP4869455 B2 JP 4869455B2 JP 2011528517 A JP2011528517 A JP 2011528517A JP 2011528517 A JP2011528517 A JP 2011528517A JP 4869455 B2 JP4869455 B2 JP 4869455B2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- frequency
- broadcast
- detection
- noise
- 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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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
- H04B1/1027—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
- H03J1/00—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general
- H03J1/0008—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general using a central processing unit, e.g. a microprocessor
- H03J1/0041—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general using a central processing unit, e.g. a microprocessor for frequency synthesis with counters or frequency dividers
- H03J1/005—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general using a central processing unit, e.g. a microprocessor for frequency synthesis with counters or frequency dividers in a loop
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
- H03J1/00—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general
- H03J1/0008—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general using a central processing unit, e.g. a microprocessor
- H03J1/0058—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general using a central processing unit, e.g. a microprocessor provided with channel identification means
- H03J1/0066—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general using a central processing unit, e.g. a microprocessor provided with channel identification means with means for analysing the received signal strength
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Circuits Of Receivers In General (AREA)
- Noise Elimination (AREA)
Description
図1は本発明の実施の形態1におけるラジオ受信機の構成を示すブロック図である。
アンテナ1は、放送信号を受信すると、受信信号をRFアンプ2に出力する。RFアンプ2は、受信信号を増幅し、周波数混合器3に出力する。
実施の形態2
実施の形態3
3 周波数混合器
6 IFアンプ
7 検波器
8 電界強度検出器
9 IFカウンタ
10 バンドパスフィルタ
11 信号強度検出手段
12 マイコン
14 放送信号検知判定部
15 PLL制御部
17 DSP
18 ノイズ検出器
Claims (2)
- 放送信号を受信してRF信号を生成するRFアンプと、
前記RF信号からIF信号を生成するIF変換手段と、
前記IF信号の電界強度を検出する電界強度検出器と、
前記IF信号の周波数を検出する周波数検出手段と、
前記IF信号を検波して検波信号を生成する検波器と、
前記検波器で生成された前記検波信号の中からある特定の周波数帯域に存在するデジタル信号の高調波成分であるノイズ信号の強度を検出するノイズ信号検出手段と、
前記電界強度検出器で検出した電界強度が所定の電界強度より大きいかまたは等しい、かつ前記周波数検出手段で検出した周波数が所定の周波数範囲内であり、かつ前記ノイズ信号検出手段で検出したノイズ信号の強度が所定の値より小さいかまたは等しいとき、前記放送信号に希望のアナログ放送信号が含まれると判定する放送信号検知判定部と、
前記放送信号検知判定部による前記判定に基づき、前記放送信号のサーチを停止するように制御する制御手段と
を備えるラジオ受信機。 - ノイズ信号検出手段は、検波信号の中からある特定の周波数帯域に存在する信号を通過させるバンドパスフィルタと、
前記バンドパスフィルタを通過した信号の強度を検出する信号強度検出手段と、
から構成した請求項1記載のラジオ受信機。
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2009/004187 WO2011024227A1 (ja) | 2009-08-28 | 2009-08-28 | ラジオ受信機 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP4869455B2 true JP4869455B2 (ja) | 2012-02-08 |
JPWO2011024227A1 JPWO2011024227A1 (ja) | 2013-01-24 |
Family
ID=43627357
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2011528517A Expired - Fee Related JP4869455B2 (ja) | 2009-08-28 | 2009-08-28 | ラジオ受信機 |
Country Status (3)
Country | Link |
---|---|
US (1) | US8364073B2 (ja) |
JP (1) | JP4869455B2 (ja) |
WO (1) | WO2011024227A1 (ja) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112235002B (zh) * | 2020-12-14 | 2021-03-09 | 展讯通信(上海)有限公司 | 谐波消除方法及装置、存储介质、终端 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH1168519A (ja) * | 1997-08-19 | 1999-03-09 | Kenwood Corp | 受信機の自動選局装置 |
JP2001333347A (ja) * | 2000-05-23 | 2001-11-30 | Pioneer Electronic Corp | アナログ・デジタル両用テレビ受信装置 |
JP2008227901A (ja) * | 2007-03-13 | 2008-09-25 | Kenwood Corp | 放送電波識別方法、アナログ放送受信装置およびデジタル放送受信装置 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08222999A (ja) | 1995-02-16 | 1996-08-30 | Sanyo Electric Co Ltd | 停止信号発生回路 |
JP3955143B2 (ja) | 1998-02-19 | 2007-08-08 | 富士通テン株式会社 | ディジタル放送受信機 |
JP4596740B2 (ja) * | 2003-03-03 | 2010-12-15 | シャープ株式会社 | デジタル放送受信装置 |
JP4076912B2 (ja) | 2003-06-10 | 2008-04-16 | アルパイン株式会社 | Iboc放送受信機 |
JP4381209B2 (ja) * | 2004-04-05 | 2009-12-09 | アルパイン株式会社 | オーディオ装置 |
US20060229750A1 (en) * | 2005-04-12 | 2006-10-12 | Charles Rozier | System and method for providing access to supplemental program services |
JP2007259403A (ja) | 2006-02-23 | 2007-10-04 | Victor Co Of Japan Ltd | ラジオ受信機 |
JP2009141468A (ja) * | 2007-12-04 | 2009-06-25 | Clarion Co Ltd | 放送受信機、およびチャネルシーク方法 |
-
2009
- 2009-08-28 WO PCT/JP2009/004187 patent/WO2011024227A1/ja active Application Filing
- 2009-08-28 US US13/375,777 patent/US8364073B2/en not_active Expired - Fee Related
- 2009-08-28 JP JP2011528517A patent/JP4869455B2/ja not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH1168519A (ja) * | 1997-08-19 | 1999-03-09 | Kenwood Corp | 受信機の自動選局装置 |
JP2001333347A (ja) * | 2000-05-23 | 2001-11-30 | Pioneer Electronic Corp | アナログ・デジタル両用テレビ受信装置 |
JP2008227901A (ja) * | 2007-03-13 | 2008-09-25 | Kenwood Corp | 放送電波識別方法、アナログ放送受信装置およびデジタル放送受信装置 |
Also Published As
Publication number | Publication date |
---|---|
WO2011024227A1 (ja) | 2011-03-03 |
US8364073B2 (en) | 2013-01-29 |
JPWO2011024227A1 (ja) | 2013-01-24 |
US20120122413A1 (en) | 2012-05-17 |
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