JP4805272B2 - 送信装置 - Google Patents
送信装置 Download PDFInfo
- Publication number
- JP4805272B2 JP4805272B2 JP2007534223A JP2007534223A JP4805272B2 JP 4805272 B2 JP4805272 B2 JP 4805272B2 JP 2007534223 A JP2007534223 A JP 2007534223A JP 2007534223 A JP2007534223 A JP 2007534223A JP 4805272 B2 JP4805272 B2 JP 4805272B2
- Authority
- JP
- Japan
- Prior art keywords
- component
- signal
- carrier leak
- quadrature
- offset value
- 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
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
- H04L27/36—Modulator circuits; Transmitter circuits
- H04L27/362—Modulation using more than one carrier, e.g. with quadrature carriers, separately amplitude modulated
- H04L27/364—Arrangements for overcoming imperfections in the modulator, e.g. quadrature error or unbalanced I and Q levels
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
- H03F1/0205—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation in transistor amplifiers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/32—Modifications of amplifiers to reduce non-linear distortion
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/32—Modifications of amplifiers to reduce non-linear distortion
- H03F1/3241—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits
- H03F1/3247—Modifications of amplifiers to reduce non-linear distortion using predistortion circuits using feedback acting on predistortion circuits
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
- H03F3/24—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/06—Dc level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
- H04L27/20—Modulator circuits; Transmitter circuits
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/228—A measuring circuit being coupled to the input of an amplifier
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/336—A I/Q, i.e. phase quadrature, modulator or demodulator being used in an amplifying circuit
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/375—Circuitry to compensate the offset being present in an amplifier
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Transmitters (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Description
Claims (4)
- 同相信号成分と直交信号成分からなる入力信号により搬送波を直交変調し、送信される変調信号を出力する直交変調器と、
前記変調信号に含まれるキャリアリーク成分を検出する検出手段と、
前記キャリアリーク成分を補償するために前記入力信号に加えられるDCオフセット値を前記キャリアリーク成分に基づいて求めるDCオフセット値演算手段と、
異なるサンプリングタイミングで得られる2つの前記キャリアリーク成分又は前記DCオフセット値を比較し、その増減の変化方向が、連続して所定回数同一方向である場合、前記直交変調器の異常と判定する異常判定手段とを備えることを特徴とする送信装置。 - 同相信号成分と直交信号成分からなる入力信号により搬送波を直交変調し、送信される変調信号を出力する直交変調器と、
前記変調信号に含まれるキャリアリーク成分を検出する検出手段と、
前記キャリアリーク成分を補償するために前記入力信号に加えられるDCオフセット値を前記キャリアリーク成分に基づいて求めるDCオフセット値演算手段と、
異なるサンプリングタイミングで得られる2つの前記キャリアリーク成分又は前記DCオフセット値を比較し、その差分値が、所定値を超えている場合、前記直交変調器の異常と判定する異常判定手段とを備えることを特徴とする送信装置。 - 請求項1又は2において、
前記異常判定手段が比較に用いるキャリアリーク成分又は前記DCオフセット値は、複数のサンプリングタイミングで得られる複数のキャリアリーク成分又は前記DCオフセット値の平均値であることを特徴とする送信装置。 - 請求項1乃至3のいずれかにおいて、
前記異常判定手段は、前記直交変調器の異常と判定した場合、前記変調信号の送信を停止させることを特徴とする送信装置。
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2005/016537 WO2007029328A1 (ja) | 2005-09-08 | 2005-09-08 | 送信装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPWO2007029328A1 JPWO2007029328A1 (ja) | 2009-03-12 |
JP4805272B2 true JP4805272B2 (ja) | 2011-11-02 |
Family
ID=37835465
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2007534223A Expired - Fee Related JP4805272B2 (ja) | 2005-09-08 | 2005-09-08 | 送信装置 |
Country Status (4)
Country | Link |
---|---|
US (1) | US8135090B2 (ja) |
EP (1) | EP1924042B1 (ja) |
JP (1) | JP4805272B2 (ja) |
WO (1) | WO2007029328A1 (ja) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2148486A1 (fr) | 2008-07-25 | 2010-01-27 | STMicroelectronics N.V. | Procédé et système de traitement des imperfections d'une chaîne de transmission radiofréquence et appareil de communication incorporant une telle chaîne de transmission. |
JP4802283B2 (ja) * | 2010-01-08 | 2011-10-26 | 株式会社エヌ・ティ・ティ・ドコモ | 無線通信装置及び無線通信方法 |
WO2015105600A1 (en) * | 2014-01-13 | 2015-07-16 | Clairvoyant Technology Llc | Rf system using pr-ask with orthogonal offset |
JP6436303B2 (ja) * | 2015-03-24 | 2018-12-12 | パナソニックIpマネジメント株式会社 | 無線通信装置及び故障判定方法 |
US20180209803A1 (en) | 2017-01-25 | 2018-07-26 | Via Transportation, Inc. | Dynamic Route Planning |
EP3659078B1 (en) | 2017-07-26 | 2023-08-30 | Via Transportation, Inc. | Systems and methods for managing and routing ridesharing vehicles |
EP3738085A1 (en) | 2018-01-08 | 2020-11-18 | Via Transportation, Inc. | Systems and methods for managing and scheduling ridesharing vehicles |
US11620592B2 (en) | 2018-04-09 | 2023-04-04 | Via Transportation, Inc. | Systems and methods for planning transportation routes |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03239041A (ja) * | 1990-02-16 | 1991-10-24 | Nec Corp | アラーム方式 |
JPH0514429A (ja) * | 1991-07-08 | 1993-01-22 | Oki Electric Ind Co Ltd | 直交変調器キヤリア・リーク調整回路 |
JPH0787142A (ja) * | 1993-09-17 | 1995-03-31 | Fujitsu Ltd | ディジタル変調波のモニタ方式 |
JPH09135278A (ja) * | 1995-11-13 | 1997-05-20 | Fujitsu Ltd | 出力アラーム回路 |
JP2000244596A (ja) * | 1999-02-23 | 2000-09-08 | Japan Radio Co Ltd | トレーニング機能付送信機 |
JP2001007869A (ja) * | 1999-06-18 | 2001-01-12 | Fujitsu General Ltd | キャリアリーク抑制回路 |
JP2001069017A (ja) * | 1999-08-31 | 2001-03-16 | Nec Saitama Ltd | 無線通信装置、周波数検出回路および周波数検出方法 |
JP2001339452A (ja) * | 2000-05-26 | 2001-12-07 | Hitachi Kokusai Electric Inc | 直交変調装置及び直交変調誤差検出方法 |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2796285B2 (ja) | 1986-07-11 | 1998-09-10 | 株式会社日立製作所 | トラッキング方法及びそれを用いた光ディスク装置 |
JPH0282847A (ja) * | 1988-09-20 | 1990-03-23 | Fujitsu Denso Ltd | 入力信号断検出制御方式 |
JPH0522356A (ja) * | 1991-07-16 | 1993-01-29 | Fujitsu Ltd | 変調器 |
JP2597342B2 (ja) * | 1992-11-27 | 1997-04-02 | 東光株式会社 | コンパレータ回路 |
JPH10178357A (ja) * | 1996-12-19 | 1998-06-30 | Hitachi Denshi Ltd | 無線機 |
JP3501021B2 (ja) * | 1999-06-30 | 2004-02-23 | トヨタ自動車株式会社 | エバポパージシステムの故障診断装置 |
BR0212206A (pt) * | 2001-08-30 | 2004-09-21 | Ntt Docomo Inc | Sistema e processo de radiotransmissão, e aparelho transmissor e aparelho receptor usados no sistema de radiotransmissão |
JP2004110892A (ja) * | 2002-09-13 | 2004-04-08 | Sony Corp | オフトラック信号生成装置及び光ディスクドライブ装置 |
WO2004054280A2 (en) * | 2002-12-10 | 2004-06-24 | Data Flow Systems, Inc. | Radio communication system employing spectral reuse transceivers |
US7139534B2 (en) * | 2003-03-05 | 2006-11-21 | Matsushita Electric Industrial Co., Ltd. | Transmission circuit |
JP2005016537A (ja) | 2003-06-23 | 2005-01-20 | Canon Inc | マウント装置および露光装置 |
US7400690B2 (en) * | 2003-10-14 | 2008-07-15 | Agere Systems Inc. | Adaptive phase controller, method of controlling a phase and transmitter employing the same |
KR20050041481A (ko) * | 2003-10-31 | 2005-05-04 | 삼성전자주식회사 | 아날로그 구적 변조 에러 보상 장치 및 방법 |
US7310387B2 (en) * | 2003-12-26 | 2007-12-18 | Electronics And Telecommunications Research Institute | Apparatus for compensating DC offsets, gain and phase imbalances between I-channel and Q-channel in quadrature transceiving system |
US7469491B2 (en) * | 2004-01-27 | 2008-12-30 | Crestcom, Inc. | Transmitter predistortion circuit and method therefor |
KR100603200B1 (ko) * | 2005-02-18 | 2006-07-24 | 삼성전자주식회사 | Ofdm 멀티 반송파를 변조하는 듀얼 캐리어 모듈레이터,이를 이용한 ofdm 송신기, 및 그 방법 |
KR100955843B1 (ko) * | 2006-03-13 | 2010-05-04 | 인터디지탈 테크날러지 코포레이션 | 1 비트 디지털 직교 변조기 |
-
2005
- 2005-09-08 JP JP2007534223A patent/JP4805272B2/ja not_active Expired - Fee Related
- 2005-09-08 WO PCT/JP2005/016537 patent/WO2007029328A1/ja active Application Filing
- 2005-09-08 EP EP05782310.6A patent/EP1924042B1/en not_active Expired - Fee Related
-
2008
- 2008-03-04 US US12/041,786 patent/US8135090B2/en not_active Expired - Fee Related
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03239041A (ja) * | 1990-02-16 | 1991-10-24 | Nec Corp | アラーム方式 |
JPH0514429A (ja) * | 1991-07-08 | 1993-01-22 | Oki Electric Ind Co Ltd | 直交変調器キヤリア・リーク調整回路 |
JPH0787142A (ja) * | 1993-09-17 | 1995-03-31 | Fujitsu Ltd | ディジタル変調波のモニタ方式 |
JPH09135278A (ja) * | 1995-11-13 | 1997-05-20 | Fujitsu Ltd | 出力アラーム回路 |
JP2000244596A (ja) * | 1999-02-23 | 2000-09-08 | Japan Radio Co Ltd | トレーニング機能付送信機 |
JP2001007869A (ja) * | 1999-06-18 | 2001-01-12 | Fujitsu General Ltd | キャリアリーク抑制回路 |
JP2001069017A (ja) * | 1999-08-31 | 2001-03-16 | Nec Saitama Ltd | 無線通信装置、周波数検出回路および周波数検出方法 |
JP2001339452A (ja) * | 2000-05-26 | 2001-12-07 | Hitachi Kokusai Electric Inc | 直交変調装置及び直交変調誤差検出方法 |
Also Published As
Publication number | Publication date |
---|---|
US20080152036A1 (en) | 2008-06-26 |
EP1924042A4 (en) | 2012-09-05 |
WO2007029328A1 (ja) | 2007-03-15 |
US8135090B2 (en) | 2012-03-13 |
EP1924042A1 (en) | 2008-05-21 |
EP1924042B1 (en) | 2016-04-13 |
JPWO2007029328A1 (ja) | 2009-03-12 |
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