FR3022081B1 - ASYMETRIC UPSTREAM SELECTIVE FILTERING IN FREQUENCY MODULATION - Google Patents

ASYMETRIC UPSTREAM SELECTIVE FILTERING IN FREQUENCY MODULATION Download PDF

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Publication number
FR3022081B1
FR3022081B1 FR1459469A FR1459469A FR3022081B1 FR 3022081 B1 FR3022081 B1 FR 3022081B1 FR 1459469 A FR1459469 A FR 1459469A FR 1459469 A FR1459469 A FR 1459469A FR 3022081 B1 FR3022081 B1 FR 3022081B1
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Prior art keywords
frequency
frequency channel
filter
selective filtering
asymetric
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FR1459469A
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French (fr)
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FR3022081A1 (en
Inventor
Cyrille Potereau
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Continental Automotive GmbH
Continental Automotive France SAS
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Continental Automotive GmbH
Continental Automotive France SAS
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Publication of FR3022081A1 publication Critical patent/FR3022081A1/en
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Publication of FR3022081B1 publication Critical patent/FR3022081B1/en
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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

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Noise Elimination (AREA)
  • Circuits Of Receivers In General (AREA)

Abstract

Procédé de filtrage sélectif dynamique des canaux dans la bande FM, le procédé comprenant les étapes : /a/ sélectionner un premier canal fréquentiel (FO) portant des signaux d'une station d'intérêt, /b1 / appliquer aux signaux reçus un filtre d'entrée (11) centré sur le premier canal fréquentiel, opérer une transposition en bande de base, et numériser (12) le signal filtré, /b2/ appliquer une transformée de Fourier(14), et rechercher dans la courbe formant le résultat de la transformée de Fourier, une fréquence de croisement (FC), /c/ appliquer aux signaux numérisés un filtre sélectif asymétrique (15), le filtre ayant une de ses deux bornes (FW) déduite de la fréquence de croisement (FC), l'autre de ses deux bornes étant laissée à une valeur par défaut plus éloignée de la fréquence du canal fréquentiel (FO), /d/ répéter continuellement les étapes /b1/ /b2/ et /c/ jusqu'à un changement de canal fréquentiel.Method of dynamic selective filtering of channels in the FM band, the method comprising the steps: / a / selecting a first frequency channel (FO) carrying signals from a station of interest, / b1 / applying a filter d to the signals received 'input (11) centered on the first frequency channel, perform a baseband transposition, and digitize (12) the filtered signal, / b2 / apply a Fourier transform (14), and search in the curve forming the result of the Fourier transform, a crossover frequency (FC), / c / apply to the digitized signals an asymmetric selective filter (15), the filter having one of its two terminals (FW) deduced from the crossover frequency (FC), l 'the other of its two terminals being left at a default value further from the frequency of the frequency channel (FO), / d / continually repeat steps / b1 / / b2 / and / c / until a change of frequency channel .

FR1459469A 2014-06-05 2014-10-03 ASYMETRIC UPSTREAM SELECTIVE FILTERING IN FREQUENCY MODULATION Active FR3022081B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US201462008042P 2014-06-05 2014-06-05

Publications (2)

Publication Number Publication Date
FR3022081A1 FR3022081A1 (en) 2015-12-11
FR3022081B1 true FR3022081B1 (en) 2021-03-05

Family

ID=52144627

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1459469A Active FR3022081B1 (en) 2014-06-05 2014-10-03 ASYMETRIC UPSTREAM SELECTIVE FILTERING IN FREQUENCY MODULATION

Country Status (2)

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FR (1) FR3022081B1 (en)
WO (1) WO2015185073A1 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI98580C (en) * 1991-11-14 1997-07-10 Nokia Mobile Phones Ltd Selective filtration in a cellular phone
US6178314B1 (en) * 1997-06-27 2001-01-23 Visteon Global Technologies, Inc. Radio receiver with adaptive bandwidth controls at intermediate frequency and audio frequency sections
DE602005017052D1 (en) * 2005-11-11 2009-11-19 Ericsson Telefon Ab L M Filter and method for suppressing effects of adjacent channel interference
US8600331B2 (en) * 2012-04-11 2013-12-03 Black Berry Limited Radio receiver with reconfigurable baseband channel filter

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Publication number Publication date
WO2015185073A1 (en) 2015-12-10
FR3022081A1 (en) 2015-12-11

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