CA2242294A1 - Bandpass phase tracker with hilbert transformation before plural-phase analog-to-digital conversion - Google Patents

Bandpass phase tracker with hilbert transformation before plural-phase analog-to-digital conversion

Info

Publication number
CA2242294A1
CA2242294A1 CA002242294A CA2242294A CA2242294A1 CA 2242294 A1 CA2242294 A1 CA 2242294A1 CA 002242294 A CA002242294 A CA 002242294A CA 2242294 A CA2242294 A CA 2242294A CA 2242294 A1 CA2242294 A1 CA 2242294A1
Authority
CA
Canada
Prior art keywords
signal
analog
digital
phase
ultimate
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
CA002242294A
Other languages
French (fr)
Other versions
CA2242294C (en
Inventor
Allen Leroy Limberg
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.)
Samsung Electronics Co Ltd
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2242294A1 publication Critical patent/CA2242294A1/en
Application granted granted Critical
Publication of CA2242294C publication Critical patent/CA2242294C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/64—Circuits for processing colour signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/02—Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation
    • H04L27/06—Demodulator circuits; Receiver circuits

Abstract

The tuner in a digital TV receiver converts received signal to a penultimate intermediate-frequency signal. Penultimate local oscillations are supplied in a first phasing and in a second phasing in quadrature therewith, for heterodyning with t he penultimate IF signal in first and second mixers respectively to generate real a nd imaginary components of an ultimate intermediate-frequency signal. The first and second mixers are of a switching type, switching in respective response to the penultimate local oscillations as supplied in first and in second phasing. First analog-to-digital conversion circuitry containing a number N of analog-to-digita l converters digitizes the real component of the ultimate IF signal on an N-phase basis, N be ing at least one. Second analog-to-digital conversion circuitry, which contains a numbe r N of analog-to-digital converters, digitizes the imaginary component of the ultima te IF signal on an N-phase basis. A complex digital carrier signal is generated at the frequency of the radio carrier wave as Translated to the ultimale IF signal band , Synchrodyning circuitry respondj to the complex digital carrier signal supplied as ultimate local oscillations, and to the digital samples of the real and imaginar y components of the ultimate IF signal, for recovering in-phase and quadrature-pha se components of baseband signal.
CA002242294A 1997-07-10 1998-07-06 Bandpass phase tracker with hilbert transformation before plural-phase analog-to-digital conversion Expired - Fee Related CA2242294C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/891,210 US5982820A (en) 1997-07-10 1997-07-10 Bandpass phase tracker with hilbert transformation before plural-phase analog-to-digital conversion
US08/891,210 1997-07-10

Publications (2)

Publication Number Publication Date
CA2242294A1 true CA2242294A1 (en) 1999-01-10
CA2242294C CA2242294C (en) 2001-10-23

Family

ID=25397793

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002242294A Expired - Fee Related CA2242294C (en) 1997-07-10 1998-07-06 Bandpass phase tracker with hilbert transformation before plural-phase analog-to-digital conversion

Country Status (6)

Country Link
US (2) US5982820A (en)
JP (1) JPH11112594A (en)
KR (1) KR100271971B1 (en)
AU (1) AU716118B2 (en)
CA (1) CA2242294C (en)
SG (1) SG67522A1 (en)

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CN1154245C (en) * 1994-11-30 2004-06-16 松下电器产业株式会社 Receiving circuit
US5982820A (en) * 1997-07-10 1999-11-09 Samsung Electronics Co., Ltd. Bandpass phase tracker with hilbert transformation before plural-phase analog-to-digital conversion
US6104763A (en) * 1998-02-20 2000-08-15 Samsung Electronics Co., Ltd. Synchrodyning of VSB and QAM final I-F signals supplied by separate converters in a QAM/VSB digital TV receiver
US6313885B1 (en) * 1998-03-25 2001-11-06 Samsung Electronics Co., Ltd. DTV receiver with baseband equalization filters for QAM signal and for VSB signal which employ common elements
IL127569A0 (en) 1998-09-16 1999-10-28 Comsense Technologies Ltd Interactive toys
US20100030838A1 (en) * 1998-08-27 2010-02-04 Beepcard Ltd. Method to use acoustic signals for computer communications
US6607136B1 (en) 1998-09-16 2003-08-19 Beepcard Inc. Physical presence digital authentication system
CA2345745A1 (en) 1998-10-02 2000-04-13 Comsense Technologies, Ltd. Card for interaction with a computer
JP2001008118A (en) * 1999-06-22 2001-01-12 Alps Electric Co Ltd Digital television tuner
US6446012B1 (en) * 1999-06-23 2002-09-03 Bfcs Technology, Inc. Proximity detector for hard-to-detect materials
US8019609B2 (en) 1999-10-04 2011-09-13 Dialware Inc. Sonic/ultrasonic authentication method
US20010033622A1 (en) * 2000-03-14 2001-10-25 Joengren George Robust utilization of feedback information in space-time coding
JP2002164949A (en) * 2000-09-18 2002-06-07 Alps Electric Co Ltd Digital orthogonal signal detection circuit
GB0027503D0 (en) * 2000-11-10 2000-12-27 Koninkl Philips Electronics Nv Radio receiver
US9219708B2 (en) 2001-03-22 2015-12-22 DialwareInc. Method and system for remotely authenticating identification devices
EP1265412A2 (en) * 2001-06-07 2002-12-11 Alps Electric Co., Ltd. Provision of quadrature signals in a multicarrier receiver
US20030112860A1 (en) * 2001-12-18 2003-06-19 Erdogan Alper Tunga Method and system for shortening channel impulse response using time domain equalization filter
US6621442B1 (en) 2002-06-24 2003-09-16 Charles Douglas Murphy Analog-to-digital conversion with piece-wise non-linear reference waveforms
US7319852B2 (en) * 2002-08-29 2008-01-15 Qualcomm, Incorporated Apparatus and method for DC offset compensation in a direct conversion receiver
CN1317875C (en) * 2003-09-26 2007-05-23 南京Lg新港显示有限公司 Carrier reset device
US7519330B2 (en) * 2004-03-08 2009-04-14 Tektronix, Inc. Simultaneous ACLR measurement
US7352827B2 (en) * 2004-03-18 2008-04-01 Tektronix, Inc. Multichannel simultaneous real time spectrum analysis with offset frequency trigger
US9001932B2 (en) 2012-12-29 2015-04-07 Motorola Solutions, Inc. Method and apparatus for extracting the quadrature component of a complex signal from the in-phase component after baseband digitizing using a complex transform
US10126884B2 (en) 2014-12-22 2018-11-13 Synaptics Incorporated Asynchronous interference detection in a capacitive sensing system
US10158370B2 (en) * 2017-03-15 2018-12-18 Assocciated Universities, Inc. Polar analog-to-digital converter and down converter for bandpass signals

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3241098B2 (en) * 1992-06-12 2001-12-25 株式会社東芝 Multi-system receiver
JP3074103B2 (en) * 1993-11-16 2000-08-07 株式会社東芝 OFDM synchronous demodulation circuit
US5448299A (en) * 1994-01-05 1995-09-05 Samsung Electronics Co., Ltd. Apparatus for processing BPSK signals transmitted with NTSC TV on quadrature-phase video carrier
JP3139909B2 (en) * 1994-03-15 2001-03-05 株式会社東芝 Hierarchical orthogonal frequency multiplexing transmission system and transmitting / receiving apparatus
US5636252A (en) * 1994-05-04 1997-06-03 Samsung Electronics Co., Ltd. Automatic gain control of radio receiver for receiving digital high-definition television signals
US5479449A (en) * 1994-05-04 1995-12-26 Samsung Electronics Co. Ltd. Digital VSB detector with bandpass phase tracker, as for inclusion in an HDTV receiver.
US5506636A (en) * 1994-06-28 1996-04-09 Samsung Electronics Co., Ltd. HDTV signal receiver with imaginary-sample-presence detector for QAM/VSB mode selection
US5841814A (en) * 1995-10-17 1998-11-24 Paradyne Corporation Sampling system for radio frequency receiver
US5966188A (en) * 1996-12-26 1999-10-12 Samsung Electronics Co., Ltd. Decimation of baseband DTV signals prior to channel equalization in digital television signal receivers
US5982820A (en) * 1997-07-10 1999-11-09 Samsung Electronics Co., Ltd. Bandpass phase tracker with hilbert transformation before plural-phase analog-to-digital conversion
US6104763A (en) * 1998-02-20 2000-08-15 Samsung Electronics Co., Ltd. Synchrodyning of VSB and QAM final I-F signals supplied by separate converters in a QAM/VSB digital TV receiver

Also Published As

Publication number Publication date
AU7510398A (en) 1999-02-11
AU716118B2 (en) 2000-02-17
KR100271971B1 (en) 2000-11-15
KR19990013754A (en) 1999-02-25
SG67522A1 (en) 1999-09-21
US6301312B1 (en) 2001-10-09
CA2242294C (en) 2001-10-23
US5982820A (en) 1999-11-09
JPH11112594A (en) 1999-04-23

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Legal Events

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EEER Examination request
MKLA Lapsed
MKLA Lapsed

Effective date: 20090706