GB2436652B - Dynamically adaptive multi-stage filter - Google Patents

Dynamically adaptive multi-stage filter

Info

Publication number
GB2436652B
GB2436652B GB0606537A GB0606537A GB2436652B GB 2436652 B GB2436652 B GB 2436652B GB 0606537 A GB0606537 A GB 0606537A GB 0606537 A GB0606537 A GB 0606537A GB 2436652 B GB2436652 B GB 2436652B
Authority
GB
United Kingdom
Prior art keywords
stage filter
adaptive multi
dynamically adaptive
dynamically
stage
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
GB0606537A
Other versions
GB2436652A (en
GB0606537D0 (en
Inventor
David Lomas
Paul Naish
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to GB0606537A priority Critical patent/GB2436652B/en
Publication of GB0606537D0 publication Critical patent/GB0606537D0/en
Publication of GB2436652A publication Critical patent/GB2436652A/en
Application granted granted Critical
Publication of GB2436652B publication Critical patent/GB2436652B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • 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
    • H03D3/001—Details of arrangements applicable to more than one type of frequency demodulator
    • H03D3/003—Arrangements for reducing frequency deviation, e.g. by negative frequency feedback
    • H03D3/005—Arrangements for reducing frequency deviation, e.g. by negative frequency feedback wherein the demodulated signal is used for controlling a bandpass filter
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3052—Automatic control in amplifiers having semiconductor devices in bandpass amplifiers (H.F. or I.F.) or in frequency-changers used in a (super)heterodyne receiver
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G5/00—Tone control or bandwidth control in amplifiers
    • H03G5/16—Automatic control
    • H03G5/24—Automatic control in frequency-selective amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H11/00—Networks using active elements
    • H03H11/02—Multiple-port networks
    • H03H11/04—Frequency selective two-port networks
    • H03H11/12—Frequency selective two-port networks using amplifiers with feedback
    • H03H11/1291—Current or voltage controlled filters
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H21/00—Adaptive networks
    • H03H21/0012—Digital adaptive filters
    • H03H21/0043—Adaptive algorithms
    • 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
    • H04B1/1638—Special circuits to enhance selectivity of receivers not otherwise provided for
GB0606537A 2006-03-31 2006-03-31 Dynamically adaptive multi-stage filter Expired - Fee Related GB2436652B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0606537A GB2436652B (en) 2006-03-31 2006-03-31 Dynamically adaptive multi-stage filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0606537A GB2436652B (en) 2006-03-31 2006-03-31 Dynamically adaptive multi-stage filter

Publications (3)

Publication Number Publication Date
GB0606537D0 GB0606537D0 (en) 2006-05-10
GB2436652A GB2436652A (en) 2007-10-03
GB2436652B true GB2436652B (en) 2008-02-20

Family

ID=36425023

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0606537A Expired - Fee Related GB2436652B (en) 2006-03-31 2006-03-31 Dynamically adaptive multi-stage filter

Country Status (1)

Country Link
GB (1) GB2436652B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150222459A1 (en) * 2014-02-04 2015-08-06 Qualcomm Incorporated Methods and devices for dynamic filter configuration in the presence of adjacent channel interference (aci)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5339455A (en) * 1992-03-18 1994-08-16 Blaupunkt Werke Gmbh Radio receiver adjacent-channel interference suppression circuit
US5691666A (en) * 1995-06-07 1997-11-25 Owen; Joseph C. Full threshold FM deviation compression feedback demodulator and method
EP0887944A2 (en) * 1997-06-27 1998-12-30 Ford Global Technologies, Inc. Digital processing radio receiver
US6154547A (en) * 1998-05-07 2000-11-28 Visteon Global Technologies, Inc. Adaptive noise reduction filter with continuously variable sliding bandwidth

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5339455A (en) * 1992-03-18 1994-08-16 Blaupunkt Werke Gmbh Radio receiver adjacent-channel interference suppression circuit
US5691666A (en) * 1995-06-07 1997-11-25 Owen; Joseph C. Full threshold FM deviation compression feedback demodulator and method
EP0887944A2 (en) * 1997-06-27 1998-12-30 Ford Global Technologies, Inc. Digital processing radio receiver
US6154547A (en) * 1998-05-07 2000-11-28 Visteon Global Technologies, Inc. Adaptive noise reduction filter with continuously variable sliding bandwidth

Also Published As

Publication number Publication date
GB2436652A (en) 2007-10-03
GB0606537D0 (en) 2006-05-10

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20120331