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DE69921475D1 - Funkendgerät - Google Patents

Funkendgerät

Info

Publication number
DE69921475D1
DE69921475D1 DE69921475T DE69921475T DE69921475D1 DE 69921475 D1 DE69921475 D1 DE 69921475D1 DE 69921475 T DE69921475 T DE 69921475T DE 69921475 T DE69921475 T DE 69921475T DE 69921475 D1 DE69921475 D1 DE 69921475D1
Authority
DE
Germany
Prior art keywords
radio terminal
radio
terminal
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
Application number
DE69921475T
Other languages
English (en)
Other versions
DE69921475T2 (de
Inventor
Takatoshi Katsura
Kenji Itoh
Shinjirou Fukuyama
Mitsuru Mochizuki
Hiroaki Nagano
Yoshinori Matsunami
Mitsuhiro Shimozawa
Fumio Ishizu
Ryoji Hayashi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Application granted granted Critical
Publication of DE69921475D1 publication Critical patent/DE69921475D1/de
Publication of DE69921475T2 publication Critical patent/DE69921475T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • H04B1/0003—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain
    • H04B1/0007—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain wherein the AD/DA conversion occurs at radiofrequency or intermediate frequency stage
    • H04B1/0014—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain wherein the AD/DA conversion occurs at radiofrequency or intermediate frequency stage using DSP [Digital Signal Processor] quadrature modulation and demodulation
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D3/00—Demodulation of angle-, frequency- or phase- modulated oscillations
    • H03D3/007—Demodulation of angle-, frequency- or phase- modulated oscillations by converting the oscillations into two quadrature related signals
    • H03D3/008—Compensating DC offsets
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
    • H03D7/02—Transference of modulation from one carrier to another, e.g. frequency-changing by means of diodes
    • 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
    • H04B1/0003—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain
    • H04B1/0028—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain wherein the AD/DA conversion occurs at baseband stage
    • H04B1/0032—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain wherein the AD/DA conversion occurs at baseband stage with analogue quadrature frequency conversion to and from the baseband
    • 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
    • H04B1/0003—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain
    • H04B1/0028—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain wherein the AD/DA conversion occurs at baseband stage
    • H04B1/0039—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain wherein the AD/DA conversion occurs at baseband stage using DSP [Digital Signal Processor] quadrature modulation and demodulation
    • 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
    • H04B1/30—Circuits for homodyne or synchrodyne receivers
    • 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
    • H04L25/061—Dc level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection providing hard decisions only; arrangements for tracking or suppressing unwanted low frequency components, e.g. removal of dc offset

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Superheterodyne Receivers (AREA)
  • Transceivers (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
DE1999621475 1999-03-11 1999-03-11 Funkendgerät Expired - Fee Related DE69921475T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP1999/001203 WO2000054420A1 (fr) 1999-03-11 1999-03-11 Dispositif terminal radio

Publications (2)

Publication Number Publication Date
DE69921475D1 true DE69921475D1 (de) 2004-12-02
DE69921475T2 DE69921475T2 (de) 2006-02-02

Family

ID=14235169

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1999621475 Expired - Fee Related DE69921475T2 (de) 1999-03-11 1999-03-11 Funkendgerät

Country Status (6)

Country Link
US (1) US6449471B1 (de)
EP (1) EP1083669B1 (de)
JP (1) JP3856647B2 (de)
CN (1) CN1192496C (de)
DE (1) DE69921475T2 (de)
WO (1) WO2000054420A1 (de)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW448610B (en) * 2000-02-29 2001-08-01 Microelectronics Tech Inc RF signal down converting method and circuit having high separation of signal
US6937646B1 (en) 2000-10-10 2005-08-30 Freescale Semiconductor, Inc. Leakage nulling receiver correlator structure and method for ultra wide bandwidth communication system
AU2001296982A1 (en) * 2000-10-10 2002-04-22 Xtremespectrum, Inc. Wavelet receiver with removal of dc offset
US6766157B1 (en) * 2001-01-03 2004-07-20 Kyocera Wireless Corp. Reducing LO leakage in a direct conversion receiver quadrature stage
JP3721144B2 (ja) * 2001-05-11 2005-11-30 株式会社東芝 周波数変換器、直交復調器及び直交変調器
US6839551B1 (en) * 2001-05-21 2005-01-04 National Semiconductor Corporation Radio frequency mixer and method of operation
JP3700933B2 (ja) * 2001-07-27 2005-09-28 松下電器産業株式会社 受信機および通信端末
US6927613B2 (en) 2001-09-07 2005-08-09 Freescale Semiconductor, Inc. Circuit generating constant narrow-pulse-width bipolarity cycle monocycles using CMOS circuits
US6812762B2 (en) 2001-09-07 2004-11-02 Freescale Semiconductor, Inc. Fast mono-cycle generating circuit using full rail swing logic circuits
US7024169B2 (en) 2002-01-25 2006-04-04 Qualcomm Incorporated AMPS receiver using a zero-IF architecture
JP3805258B2 (ja) * 2002-01-29 2006-08-02 松下電器産業株式会社 ダイレクトコンバージョン受信機
JP3622728B2 (ja) * 2002-01-30 2005-02-23 日本電気株式会社 受信機のベースバンド回路及びその低域遮断周波数制御方法
WO2003073628A1 (fr) * 2002-02-28 2003-09-04 Sharp Kabushiki Kaisha Dispositif d'emission radio en bande hyperfrequence, dispositif de reception radio en bande hyperfrequence et systeme de communication radio en bande hyperfrequence
JP2004072515A (ja) * 2002-08-07 2004-03-04 Alps Electric Co Ltd 直接変換回路
US7139542B2 (en) * 2003-03-03 2006-11-21 Nokia Corporation Method and apparatus for compensating DC level in an adaptive radio receiver
US7477885B2 (en) * 2005-04-22 2009-01-13 Wilinx Corporation DC offset cancellation circuits and methods
US7577418B2 (en) * 2006-07-18 2009-08-18 United Microelectronics Corp. Sub-harmonic mixer and down converter with the same
KR101046990B1 (ko) * 2008-10-16 2011-07-06 중앙대학교 산학협력단 미세 신호 검출장치
JP5699807B2 (ja) 2011-05-27 2015-04-15 三菱電機株式会社 高周波スイッチ
CN102291343B (zh) * 2011-08-08 2016-12-28 上海集成电路研发中心有限公司 模拟基带电路
JP6812816B2 (ja) * 2017-02-03 2021-01-13 株式会社Ｊｖｃケンウッド 受信装置、受信方法、プログラム
US10530306B2 (en) * 2018-04-13 2020-01-07 Nxp Usa, Inc. Hybrid power amplifier circuit or system with combination low-pass and high-pass interstage circuitry and method of operating same

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3503964B2 (ja) * 1993-09-21 2004-03-08 株式会社東芝 無線機
JP2591466B2 (ja) * 1994-04-13 1997-03-19 日本電気株式会社 電力増幅回路
JP3252639B2 (ja) 1995-03-03 2002-02-04 三菱電機株式会社 検波器及び受信装置並びに送信装置
JPH0983595A (ja) 1995-09-19 1997-03-28 Matsushita Electric Ind Co Ltd ダイレクトコンバージョン受信機
JP3743046B2 (ja) * 1996-01-24 2006-02-08 松下電器産業株式会社 直接変換受信機
JPH09270723A (ja) * 1996-03-29 1997-10-14 Alps Electric Co Ltd 携帯電話機の受信回路用ｉｃ
FI961935A (fi) 1996-05-07 1997-11-08 Nokia Mobile Phones Ltd Erojännitteen eliminointi ja AM-vaimennus suoramuunnosvastaanottimessa
KR100200589B1 (ko) * 1996-06-12 1999-06-15 윤종용 고해상도 텔레비젼 수신기의 디지털 복조회로 및 방법
JP3486058B2 (ja) 1996-06-24 2004-01-13 株式会社東芝 Ｄｃオフセット除去機能を備えた受信機
TW391114B (en) * 1997-01-31 2000-05-21 Scientific Atlanta System and method for harmonic interference avoidance in carrier recovery for digital demodulation
JP3468009B2 (ja) 1997-02-19 2003-11-17 三菱電機株式会社 受信機
US6127884A (en) * 1999-05-24 2000-10-03 Philips Electronics North America Corp. Differentiate and multiply based timing recovery in a quadrature demodulator

Also Published As

Publication number Publication date
EP1083669A4 (de) 2003-09-03
EP1083669B1 (de) 2004-10-27
JP3856647B2 (ja) 2006-12-13
WO2000054420A1 (fr) 2000-09-14
CN1192496C (zh) 2005-03-09
DE69921475T2 (de) 2006-02-02
EP1083669A1 (de) 2001-03-14
CN1309842A (zh) 2001-08-22
US6449471B1 (en) 2002-09-10

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee