DE19581533T1 - Breitbandfrequenzsignaldigitalisierer und Verfahren dafür - Google Patents

Breitbandfrequenzsignaldigitalisierer und Verfahren dafür

Info

Publication number
DE19581533T1
DE19581533T1 DE19581533T DE19581533T DE19581533T1 DE 19581533 T1 DE19581533 T1 DE 19581533T1 DE 19581533 T DE19581533 T DE 19581533T DE 19581533 T DE19581533 T DE 19581533T DE 19581533 T1 DE19581533 T1 DE 19581533T1
Authority
DE
Germany
Prior art keywords
frequency signal
method therefor
broadband frequency
signal digitizer
digitizer
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.)
Granted
Application number
DE19581533T
Other languages
English (en)
Other versions
DE19581533C2 (de
Inventor
Robert C Elder
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.)
Motorola Solutions Inc
Original Assignee
Motorola Inc
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 Motorola Inc filed Critical Motorola Inc
Publication of DE19581533T1 publication Critical patent/DE19581533T1/de
Application granted granted Critical
Publication of DE19581533C2 publication Critical patent/DE19581533C2/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
    • H04B1/0025—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 a sampling rate lower than twice the highest frequency component of the sampled signal
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/12—Analogue/digital converters
    • H03M1/1205—Multiplexed conversion systems
    • H03M1/121—Interleaved, i.e. using multiple converters or converter parts for one channel
    • 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
    • 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
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/26—Circuits for superheterodyne receivers
    • 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
    • H04B1/26—Circuits for superheterodyne receivers
    • H04B1/28—Circuits for superheterodyne receivers the receiver comprising at least one semiconductor device having three or more electrodes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J1/00—Frequency-division multiplex systems
    • H04J1/02—Details
    • H04J1/04—Frequency-transposition arrangements
    • H04J1/05—Frequency-transposition arrangements using digital techniques
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
    • H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/22—Arrangements for detecting or preventing errors in the information received using redundant apparatus to increase reliability
    • 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
    • H03D3/006—Demodulation of angle-, frequency- or phase- modulated oscillations by sampling the oscillations and further processing the samples, e.g. by computing techniques
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/18—Information format or content conversion, e.g. adaptation by the network of the transmitted or received information for the purpose of wireless delivery to users or terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Theoretical Computer Science (AREA)
  • Analogue/Digital Conversion (AREA)
  • Transceivers (AREA)
  • Superheterodyne Receivers (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Control Of Position Or Direction (AREA)
DE19581533T 1994-12-29 1995-11-22 Verfahren zum Digitalisieren eines Breitbandfrequenzsignals und zugehöriger Breitbandfrequenzsignaldigitalisierer Expired - Fee Related DE19581533C2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US36620594A 1994-12-29 1994-12-29
PCT/US1995/015183 WO1996021292A1 (en) 1994-12-29 1995-11-22 Wideband frequency signal digitizer and method

Publications (2)

Publication Number Publication Date
DE19581533T1 true DE19581533T1 (de) 1997-06-05
DE19581533C2 DE19581533C2 (de) 1999-02-25

Family

ID=23442070

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19581533T Expired - Fee Related DE19581533C2 (de) 1994-12-29 1995-11-22 Verfahren zum Digitalisieren eines Breitbandfrequenzsignals und zugehöriger Breitbandfrequenzsignaldigitalisierer

Country Status (11)

Country Link
US (1) US5659546A (de)
JP (1) JP3530193B2 (de)
KR (1) KR100203318B1 (de)
CA (1) CA2181807C (de)
DE (1) DE19581533C2 (de)
FI (1) FI114177B (de)
FR (1) FR2729022B1 (de)
GB (1) GB2296611B (de)
IL (1) IL116167A (de)
SE (1) SE520982C2 (de)
WO (1) WO1996021292A1 (de)

Families Citing this family (54)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6337885B1 (en) 1998-02-13 2002-01-08 Telefonaktiebolaget Lm Ericsson (Publ) Radio receiver that digitizes a received signal at a plurality of digitization frequencies
US6157682A (en) * 1998-03-30 2000-12-05 Nortel Networks Corporation Wideband receiver with bandwidth extension
US6240150B1 (en) * 1998-05-12 2001-05-29 Nortel Networks Limited Method and apparatus for filtering interference in a modem receiver
JP3484980B2 (ja) * 1998-06-23 2004-01-06 日本電気株式会社 無線受信機
US6088348A (en) * 1998-07-13 2000-07-11 Qualcom Incorporated Configurable single and dual VCOs for dual- and tri-band wireless communication systems
US6397051B1 (en) * 1998-12-21 2002-05-28 At&T Corporation Dual image-reject mixer receiver for multiple channel reception and processing
US6480528B1 (en) 1999-06-11 2002-11-12 Qualcomm Incorporated Automatic gain control for improved decoding of multi-carrier signal
AUPQ381499A0 (en) * 1999-11-02 1999-11-25 Commonwealth Of Australia, The Enhanced direct digitising array arrangement
DE19960559A1 (de) * 1999-12-15 2001-07-05 Infineon Technologies Ag Empfangsvorrichtung für winkelmodulierte Signale
AU777779B2 (en) * 2000-02-04 2004-10-28 Addest Technovation Pte. Ltd. Method and device for analog/digital converting a signal including a low-frequency component
US6741650B1 (en) 2000-03-02 2004-05-25 Adc Telecommunications, Inc. Architecture for intermediate frequency encoder
JP4682448B2 (ja) * 2001-05-25 2011-05-11 株式会社豊田中央研究所 受信装置
US7200377B2 (en) * 2001-06-06 2007-04-03 Visteon Corporation Method and system for multi-channel RF digitization with analog selectivity
WO2003032522A2 (en) 2001-10-08 2003-04-17 Qinetiq Limited Signal processing system and method for determininig antenna weights
JP2006504100A (ja) * 2002-10-24 2006-02-02 レクロイ コーポレーション 高帯域幅リアルタイムオシロスコープ
US7957938B2 (en) * 2002-10-24 2011-06-07 Lecroy Corporation Method and apparatus for a high bandwidth oscilloscope utilizing multiple channel digital bandwidth interleaving
US7219037B2 (en) * 2002-10-24 2007-05-15 Lecroy Corporation High bandwidth oscilloscope
US7711510B2 (en) 2002-10-24 2010-05-04 Lecroy Corporation Method of crossover region phase correction when summing signals in multiple frequency bands
US10659071B2 (en) 2002-10-24 2020-05-19 Teledyne Lecroy, Inc. High bandwidth oscilloscope
US7317774B2 (en) * 2003-02-13 2008-01-08 Honeywell International, Inc. Systems and methods for reducing harmonic interference effects in analog to digital conversion
CN1799272A (zh) 2003-06-05 2006-07-05 皇家飞利浦电子股份有限公司 频率复用体系结构
JP3962785B2 (ja) * 2003-07-02 2007-08-22 テクトロニクス・インターナショナル・セールス・ゲーエムベーハー シグナル・アナライザ及び周波数領域データ生成方法
US20060227898A1 (en) * 2003-07-10 2006-10-12 Gibson Timothy P Radio receiver
US7466767B2 (en) * 2004-09-13 2008-12-16 Glowlink Communications Technology, Inc. Signal processing system and method having increased bandwidth
JP2008521014A (ja) * 2004-11-18 2008-06-19 レクロイ コーポレーション 高帯域幅オシロスコープ
US7453944B2 (en) * 2004-12-21 2008-11-18 Tyco Electronics Corporation Multi-mode signal modification circuit with common mode bypass
US7298206B2 (en) * 2005-04-29 2007-11-20 Tektronix, Inc. Multi-band amplifier for test and measurement instruments
US7257497B2 (en) * 2005-04-29 2007-08-14 Tektronix, Inc. Sequential frequency band acquisition apparatus for test and measurement instruments
JP4734057B2 (ja) * 2005-07-25 2011-07-27 セコム株式会社 移動物体検出装置
US7944995B2 (en) * 2005-11-14 2011-05-17 Telefonaktiebolaget Lm Ericsson (Publ) Variable bandwidth receiver
US7610046B2 (en) * 2006-04-06 2009-10-27 Adc Telecommunications, Inc. System and method for enhancing the performance of wideband digital RF transport systems
US7304597B1 (en) * 2006-05-26 2007-12-04 Lecroy Corporation Adaptive interpolation for use in reducing signal spurs
US7720178B2 (en) * 2006-08-11 2010-05-18 Mediatek Inc. Method of direct RF digitization for multiple GNSS system bands and receiver using the same
JP4675300B2 (ja) * 2006-09-19 2011-04-20 テクトロニクス・インターナショナル・セールス・ゲーエムベーハー シグナル・アナライザ及び周波数領域データ生成方法
US20080084861A1 (en) * 2006-10-10 2008-04-10 Honeywell International Inc. Avionics communication system and method utilizing multi-channel radio technology and a shared data bus
US7535394B2 (en) * 2007-07-10 2009-05-19 Lecroy Corporation High speed arbitrary waveform generator
US8081933B2 (en) * 2007-07-13 2011-12-20 Honeywell International Inc. Reconfigurable aircraft radio communications system
US8019338B2 (en) * 2008-05-29 2011-09-13 Honeywell International Inc. Reconfigurable aircraft communications system with integrated avionics communication router and audio management functions
US9680498B2 (en) 2009-06-26 2017-06-13 Syntropy Systems, Llc Sampling/quantization converters
US9209829B2 (en) * 2009-06-26 2015-12-08 Syntropy Systems, Llc Sampling/quantization converters
EP2317660A1 (de) * 2009-11-03 2011-05-04 Nxp B.V. Mehrkanalempfänger
US8711993B2 (en) 2010-12-10 2014-04-29 Honeywell International Inc. Wideband multi-channel receiver with fixed-frequency notch filter for interference rejection
US8742749B2 (en) * 2011-05-26 2014-06-03 Tektronix, Inc. Test and measurement instrument including asynchronous time-interleaved digitizer using harmonic mixing
US9432042B2 (en) 2011-05-26 2016-08-30 Tektronix, Inc. Test and measurement instrument including asynchronous time-interleaved digitizer using harmonic mixing
US9568503B2 (en) 2011-05-26 2017-02-14 Tektronix, Inc. Calibration for test and measurement instrument including asynchronous time-interleaved digitizer using harmonic mixing
US9306590B2 (en) 2011-05-26 2016-04-05 Tektronix, Inc. Test and measurement instrument including asynchronous time-interleaved digitizer using harmonic mixing
US8463224B2 (en) * 2011-10-12 2013-06-11 Tektronix, Inc. Arbitrary multiband overlay mixer apparatus and method for bandwidth multiplication
KR101303256B1 (ko) * 2012-02-02 2013-09-03 (주)명진시스템 모르스 신호의 실시간 탐지 해독 장치 및 방법
US8928514B1 (en) 2013-09-13 2015-01-06 Tektronix, Inc. Harmonic time domain interleave to extend oscilloscope bandwidth and sample rate
EP2928083A1 (de) * 2014-03-28 2015-10-07 Tektronix, Inc. Test- und messinstrument mit asynchronem zeitverschachteltem digitalisierer unter verwendung von oberwellenmischung
US9933458B2 (en) * 2015-03-31 2018-04-03 Tektronix, Inc. Band overlay separator
US9525427B1 (en) * 2015-09-11 2016-12-20 Tektronix, Inc. Test and measurement instrument including asynchronous time-interleaved digitizer using harmonic mixing and a linear time-periodic filter
US9837990B1 (en) * 2015-12-11 2017-12-05 Syntropy Systems, Llc Digital signal processor
US10784881B1 (en) * 2019-11-15 2020-09-22 Liquid Instruments Pty Ltd. Blended anti-aliasing analog-to-digital conversion for digital test and measurement devices

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5220583A (en) * 1988-10-03 1993-06-15 Motorola, Inc. Digital fm demodulator with a reduced sampling rate
WO1994021071A1 (en) * 1993-03-08 1994-09-15 Motorola Inc. Method and apparatus for receiving electromagnetic radiation within a frequency band

Family Cites Families (40)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3991277A (en) * 1973-02-15 1976-11-09 Yoshimutsu Hirata Frequency division multiplex system using comb filters
FR2315809A1 (fr) * 1975-06-24 1977-01-21 Trt Telecom Radio Electr Systeme de transmission des signaux auxiliaires d'un groupe de voies telephoniques d'un multiplex a repartition en frequence
US4112374A (en) * 1976-09-23 1978-09-05 Steinbrecher Corporation Doubly balanced mixer with optimized dynamic range
US4206320A (en) * 1978-08-21 1980-06-03 University Of Illinois Foundation High speed modem suitable for operating with a switched network
US4237551A (en) * 1978-12-22 1980-12-02 Granger Associates Transmultiplexer
NL7903346A (nl) * 1979-04-27 1980-10-29 Bell Telephone Mfg Digitaal signaleringsstelsel.
US4492962A (en) * 1981-08-31 1985-01-08 Hansen Peder M Transmitting adaptive array antenna
US4517586A (en) * 1982-11-23 1985-05-14 Rca Corporation Digital television receiver with analog-to-digital converter having time multiplexed gain
US4514760A (en) * 1983-02-17 1985-04-30 Rca Corporation Digital television receiver with time-multiplexed analog-to-digital converter
US4621337A (en) * 1983-08-11 1986-11-04 Eastman Kodak Company Transformation circuit for implementing a collapsed Walsh-Hadamard transform
US4893316A (en) * 1985-04-04 1990-01-09 Motorola, Inc. Digital radio frequency receiver
JPH0697743B2 (ja) * 1985-04-17 1994-11-30 株式会社日立製作所 オ−バサンプル形ｄ／ａ変換器
JPS6290045A (ja) * 1985-10-16 1987-04-24 Kokusai Denshin Denwa Co Ltd <Kdd> Ｆｄｍａ通信方式における周波数割当方式
GB8628046D0 (en) * 1986-11-24 1986-12-31 British Telecomm Transmission system
DE3707960C1 (de) * 1987-03-12 1988-10-20 Ant Nachrichtentech Vieltraeger-Demodulator
US4884265A (en) * 1987-04-30 1989-11-28 Loral Corporation Digital demodulator for frequency-division-multiplexed signals
US4876542A (en) * 1988-01-25 1989-10-24 Motorola, Inc. Multiple output oversampling A/D converter with each output containing data and noise
US4979188A (en) * 1988-04-29 1990-12-18 Motorola, Inc. Spectrally efficient method for communicating an information signal
US5058107A (en) * 1989-01-05 1991-10-15 Hughes Aircraft Company Efficient digital frequency division multiplexed signal receiver
US5251218A (en) * 1989-01-05 1993-10-05 Hughes Aircraft Company Efficient digital frequency division multiplexed signal receiver
US5101501A (en) * 1989-11-07 1992-03-31 Qualcomm Incorporated Method and system for providing a soft handoff in communications in a cdma cellular telephone system
US5109390A (en) * 1989-11-07 1992-04-28 Qualcomm Incorporated Diversity receiver in a cdma cellular telephone system
US5103459B1 (en) * 1990-06-25 1999-07-06 Qualcomm Inc System and method for generating signal waveforms in a cdma cellular telephone system
US5187809A (en) * 1990-08-24 1993-02-16 Motorola, Inc. Dual mode automatic gain control
US5170413A (en) * 1990-12-24 1992-12-08 Motorola, Inc. Control strategy for reuse system assignments and handoff
US5136612A (en) * 1990-12-31 1992-08-04 At&T Bell Laboratories Method and apparatus for reducing effects of multiple access interference in a radio receiver in a code division multiple access communication system
US5347284A (en) * 1991-02-28 1994-09-13 Texas Instruments Incorporated System and method for a digital navigation satellite receiver
GB9104186D0 (en) * 1991-02-28 1991-04-17 British Aerospace Apparatus for and method of digital signal processing
CA2066851C (en) * 1991-06-13 1996-08-06 Edwin A. Kelley Multiple user digital receiver apparatus and method with combined multiple frequency channels
US5159608A (en) * 1991-08-28 1992-10-27 Falconer David D Method and apparatus for using orthogonal coding in a communication system
FR2685593B1 (fr) * 1991-12-20 1994-02-11 France Telecom Dispositif de demultiplexage en frequence a filtres numeriques.
US5295153A (en) * 1992-04-13 1994-03-15 Telefonaktiebolaget L M Ericsson CDMA frequency allocation
US5224122A (en) * 1992-06-29 1993-06-29 Motorola, Inc. Method and apparatus for canceling spread-spectrum noise
GB9219185D0 (en) * 1992-09-10 1992-10-28 Thomson Consumer Electronics A single digital modem encoder to generate a twin qam signal for advanced digital television (adtv)
US5396489A (en) * 1992-10-26 1995-03-07 Motorola Inc. Method and means for transmultiplexing signals between signal terminals and radio frequency channels
JPH06197019A (ja) * 1992-12-25 1994-07-15 Hitachi Denshi Ltd デジタルオシロスコープ
US5323157A (en) * 1993-01-15 1994-06-21 Motorola, Inc. Sigma-delta digital-to-analog converter with reduced noise
US5392044A (en) * 1993-03-08 1995-02-21 Motorola, Inc. Method and apparatus for digitizing a wide frequency bandwidth signal
US5535240A (en) * 1993-10-29 1996-07-09 Airnet Communications Corporation Transceiver apparatus employing wideband FFT channelizer and inverse FFT combiner for multichannel communication network
US5406629A (en) * 1993-12-20 1995-04-11 Motorola, Inc. Apparatus and method for digitally processing signals in a radio frequency communication system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5220583A (en) * 1988-10-03 1993-06-15 Motorola, Inc. Digital fm demodulator with a reduced sampling rate
WO1994021071A1 (en) * 1993-03-08 1994-09-15 Motorola Inc. Method and apparatus for receiving electromagnetic radiation within a frequency band

Also Published As

Publication number Publication date
FR2729022B1 (fr) 1999-12-31
KR100203318B1 (ko) 1999-06-15
CA2181807C (en) 1999-09-28
FI963345A (fi) 1996-08-27
FI963345A0 (fi) 1996-08-27
GB2296611B (en) 1998-07-22
FR2729022A1 (fr) 1996-07-05
JP3530193B2 (ja) 2004-05-24
GB9526042D0 (en) 1996-02-21
GB2296611A (en) 1996-07-03
IL116167A (en) 1999-06-20
FI114177B (fi) 2004-08-31
DE19581533C2 (de) 1999-02-25
JPH09510074A (ja) 1997-10-07
IL116167A0 (en) 1996-01-31
KR970701463A (ko) 1997-03-17
US5659546A (en) 1997-08-19
CA2181807A1 (en) 1996-07-11
SE9603089D0 (sv) 1996-08-27
WO1996021292A1 (en) 1996-07-11
SE520982C2 (sv) 2003-09-16
SE9603089L (sv) 1996-09-17

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