CA2125468A1 - Method of Selectively Reducing Spectral Components in a Wideband Radio Frequency Signal - Google Patents

Method of Selectively Reducing Spectral Components in a Wideband Radio Frequency Signal

Info

Publication number
CA2125468A1
CA2125468A1 CA2125468A CA2125468A CA2125468A1 CA 2125468 A1 CA2125468 A1 CA 2125468A1 CA 2125468 A CA2125468 A CA 2125468A CA 2125468 A CA2125468 A CA 2125468A CA 2125468 A1 CA2125468 A1 CA 2125468A1
Authority
CA
Canada
Prior art keywords
radio frequency
spectral components
selectively reducing
frequency signal
wideband radio
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
CA2125468A
Other languages
French (fr)
Other versions
CA2125468C (en
Inventor
Danny Thomas Pinckley
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 CA2125468A1 publication Critical patent/CA2125468A1/en
Application granted granted Critical
Publication of CA2125468C publication Critical patent/CA2125468C/en
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
    • H04B1/06—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
    • H04B1/1036—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal with automatic suppression of narrow band noise or interference, e.g. by using tuneable notch filters
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H17/00—Networks using digital techniques
    • H03H17/02—Frequency selective networks
    • 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
    • H04B2001/1063—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal using a notch filter

Abstract

A method of selectively reducing a magnitude of spectral components of a wideband analog radio frequency (RF) signal at an input to an analog-to-digital (A/D) converter is provided. The method includes the steps of digitizing the input to the A/D converter, analyzing the digitized inputs for relatively large spectral peaks, and notch filtering the relatively large peaks to a threshold value.
CA002125468A 1993-06-28 1994-06-08 Method of selectively reducing spectral components in a wideband radio frequency signal Expired - Fee Related CA2125468C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US8263193A 1993-06-28 1993-06-28
US08/082,631 1993-06-28

Publications (2)

Publication Number Publication Date
CA2125468A1 true CA2125468A1 (en) 1994-12-29
CA2125468C CA2125468C (en) 1998-04-21

Family

ID=22172372

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002125468A Expired - Fee Related CA2125468C (en) 1993-06-28 1994-06-08 Method of selectively reducing spectral components in a wideband radio frequency signal

Country Status (3)

Country Link
US (1) US5519890A (en)
CA (1) CA2125468C (en)
SE (1) SE9402246L (en)

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US7515896B1 (en) 1998-10-21 2009-04-07 Parkervision, Inc. Method and system for down-converting an electromagnetic signal, and transforms for same, and aperture relationships
US6694128B1 (en) 1998-08-18 2004-02-17 Parkervision, Inc. Frequency synthesizer using universal frequency translation technology
US6061551A (en) 1998-10-21 2000-05-09 Parkervision, Inc. Method and system for down-converting electromagnetic signals
US6370371B1 (en) 1998-10-21 2002-04-09 Parkervision, Inc. Applications of universal frequency translation
US6049706A (en) 1998-10-21 2000-04-11 Parkervision, Inc. Integrated frequency translation and selectivity
US7236754B2 (en) 1999-08-23 2007-06-26 Parkervision, Inc. Method and system for frequency up-conversion
US6061555A (en) 1998-10-21 2000-05-09 Parkervision, Inc. Method and system for ensuring reception of a communications signal
US7039372B1 (en) 1998-10-21 2006-05-02 Parkervision, Inc. Method and system for frequency up-conversion with modulation embodiments
US6560301B1 (en) 1998-10-21 2003-05-06 Parkervision, Inc. Integrated frequency translation and selectivity with a variety of filter embodiments
US6813485B2 (en) 1998-10-21 2004-11-02 Parkervision, Inc. Method and system for down-converting and up-converting an electromagnetic signal, and transforms for same
US6542722B1 (en) 1998-10-21 2003-04-01 Parkervision, Inc. Method and system for frequency up-conversion with variety of transmitter configurations
US6704549B1 (en) 1999-03-03 2004-03-09 Parkvision, Inc. Multi-mode, multi-band communication system
US6704558B1 (en) 1999-01-22 2004-03-09 Parkervision, Inc. Image-reject down-converter and embodiments thereof, such as the family radio service
US6853690B1 (en) 1999-04-16 2005-02-08 Parkervision, Inc. Method, system and apparatus for balanced frequency up-conversion of a baseband signal and 4-phase receiver and transceiver embodiments
US6879817B1 (en) 1999-04-16 2005-04-12 Parkervision, Inc. DC offset, re-radiation, and I/Q solutions using universal frequency translation technology
US7065162B1 (en) 1999-04-16 2006-06-20 Parkervision, Inc. Method and system for down-converting an electromagnetic signal, and transforms for same
US7110444B1 (en) 1999-08-04 2006-09-19 Parkervision, Inc. Wireless local area network (WLAN) using universal frequency translation technology including multi-phase embodiments and circuit implementations
US7693230B2 (en) 1999-04-16 2010-04-06 Parkervision, Inc. Apparatus and method of differential IQ frequency up-conversion
US6654427B1 (en) * 1999-07-28 2003-11-25 Lucent Technologies Inc. Signal notching system for limiting signal peaks
US8295406B1 (en) 1999-08-04 2012-10-23 Parkervision, Inc. Universal platform module for a plurality of communication protocols
US6373909B2 (en) * 1999-10-22 2002-04-16 Telefonaktiebolaget Lm Ericsson (Publ) Communications terminal having a receiver and method for removing known interferers from a digitized intermediate frequency signal
DE19962028A1 (en) * 1999-12-22 2001-06-28 Philips Corp Intellectual Pty Filter arrangement
US7010286B2 (en) 2000-04-14 2006-03-07 Parkervision, Inc. Apparatus, system, and method for down-converting and up-converting electromagnetic signals
US7454453B2 (en) 2000-11-14 2008-11-18 Parkervision, Inc. Methods, systems, and computer program products for parallel correlation and applications thereof
US6480709B2 (en) * 2001-01-19 2002-11-12 Motorola, Inc. Method for reducing scan time in a radio receiver
DE10122748A1 (en) * 2001-05-10 2002-11-14 Philips Corp Intellectual Pty Anti-demodulator circuit, filter device and demodulator circuit
US7072427B2 (en) 2001-11-09 2006-07-04 Parkervision, Inc. Method and apparatus for reducing DC offsets in a communication system
US7379883B2 (en) 2002-07-18 2008-05-27 Parkervision, Inc. Networking methods and systems
US7460584B2 (en) 2002-07-18 2008-12-02 Parkervision, Inc. Networking methods and systems
WO2004047323A1 (en) * 2002-11-18 2004-06-03 Koninklijke Philips Electronics N.V. Automatic gain control using signal and interference power to obtain extended blocking performance
US7035614B2 (en) * 2002-12-13 2006-04-25 Microtune (Texas), L.P. System and method for discovering frequency related spurs in a multi-conversion tuner
US6990327B2 (en) * 2003-04-30 2006-01-24 Agency For Science Technology And Research Wideband monolithic tunable high-Q notch filter for image rejection in RF application
CN1799203B (en) * 2003-06-04 2010-12-01 Nxp股份有限公司 Adaptive intermodulation distortion filter for zero-IF receivers
US7783259B2 (en) * 2004-09-28 2010-08-24 Microtune (Texas), L.P. System and method of eliminating or minimizing LO-related interference from tuners
US7904024B2 (en) * 2004-09-28 2011-03-08 Zoran Corporation System and method of eliminating or minimizing Lo-Related interference from tuners
US7738610B2 (en) * 2005-08-31 2010-06-15 Honeywell International Inc. Method and apparatus for automatic alignment of notch filters
US20080117959A1 (en) * 2006-11-22 2008-05-22 Qualcomm Incorporated False alarm reduction in detection of a synchronization signal
US7986922B2 (en) * 2006-12-15 2011-07-26 Qualcomm Incorporated Jammer detection and suppression for wireless communication
US20080146184A1 (en) * 2006-12-19 2008-06-19 Microtune (Texas), L.P. Suppression of lo-related interference from tuners
US7876869B1 (en) 2007-05-23 2011-01-25 Hypers, Inc. Wideband digital spectrometer
DE102008031643A1 (en) * 2008-07-04 2010-01-07 Continental Automotive Gmbh Receiver arrangement, in particular for use in motor vehicles
US9008249B2 (en) 2012-02-10 2015-04-14 Qualcomm Incorporated Detection and filtering of an undesired narrowband signal contribution in a wireless signal receiver
US9065686B2 (en) * 2012-11-21 2015-06-23 Qualcomm Incorporated Spur detection, cancellation and tracking in a wireless signal receiver
US9319029B1 (en) * 2015-06-19 2016-04-19 Clover Network, Inc. System and method for automatic filter tuning
US9887787B1 (en) 2016-12-15 2018-02-06 The Nielsen Company (Us), Llc Verification of radio station watermarking with software defined radios

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GB9008613D0 (en) * 1990-04-17 1990-06-13 Marconi Gec Ltd Reducing interference in r.f.signals
FR2669489B1 (en) * 1990-11-16 1994-09-09 Thomson Csf METHOD AND DEVICE FOR RECOGNIZING MODULATIONS.
US5321847A (en) * 1991-07-26 1994-06-14 Motorola, Inc. Apparatus and method for detecting intermodulation distortion in a radio frequency receiver
US5307517A (en) * 1991-10-17 1994-04-26 Rich David A Adaptive notch filter for FM interference cancellation
US5282023A (en) * 1992-05-14 1994-01-25 Hitachi America, Ltd. Apparatus for NTSC signal interference cancellation through the use of digital recursive notch filters

Also Published As

Publication number Publication date
CA2125468C (en) 1998-04-21
SE9402246L (en) 1994-12-29
US5519890A (en) 1996-05-21
SE9402246D0 (en) 1994-06-27

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