KR970706648A - 진폭 복조 방법(Amplitude demodulator) - Google Patents

진폭 복조 방법(Amplitude demodulator)

Info

Publication number
KR970706648A
KR970706648A KR1019970702129A KR19970702129A KR970706648A KR 970706648 A KR970706648 A KR 970706648A KR 1019970702129 A KR1019970702129 A KR 1019970702129A KR 19970702129 A KR19970702129 A KR 19970702129A KR 970706648 A KR970706648 A KR 970706648A
Authority
KR
South Korea
Prior art keywords
signal
phase
corrected
phase signal
frequency
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
KR1019970702129A
Other languages
English (en)
Other versions
KR100390232B1 (ko
Inventor
드자하니아르 차하바디
Original Assignee
헬무트 파이플; 만프레드 뫼저
블라우푼크트-베르케 게엠베하
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 헬무트 파이플; 만프레드 뫼저, 블라우푼크트-베르케 게엠베하 filed Critical 헬무트 파이플; 만프레드 뫼저
Publication of KR970706648A publication Critical patent/KR970706648A/ko
Application granted granted Critical
Publication of KR100390232B1 publication Critical patent/KR100390232B1/ko
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/44—Arrangements characterised by circuits or components specially adapted for broadcast
    • H04H20/46—Arrangements characterised by circuits or components specially adapted for broadcast specially adapted for broadcast systems covered by groups H04H20/53-H04H20/95
    • H04H20/47—Arrangements characterised by circuits or components specially adapted for broadcast specially adapted for broadcast systems covered by groups H04H20/53-H04H20/95 specially adapted for stereophonic broadcast systems
    • H04H20/49—Arrangements characterised by circuits or components specially adapted for broadcast specially adapted for broadcast systems covered by groups H04H20/53-H04H20/95 specially adapted for stereophonic broadcast systems for AM stereophonic broadcast systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S1/00—Two-channel systems
    • H04S1/007—Two-channel systems in which the audio signals are in digital form
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D1/00—Demodulation of amplitude-modulated oscillations
    • H03D1/22—Homodyne or synchrodyne circuits
    • H03D1/2209—Decoders for simultaneous demodulation and decoding of signals composed of a sum-signal and a suppressed carrier, amplitude modulated by a difference signal, e.g. stereocoders

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Stereo-Broadcasting Methods (AREA)
  • Micro-Organisms Or Cultivation Processes Thereof (AREA)

Abstract

방송 수신기용의 직교 진폭 변조된 스테레오 신호의 복조를 위한 진폭 복조기에 있어서, 다음과 같이 장치구성이 되어 있는 즉, 수신된 신호에서 디지털 중간 주파 신호가 생성되고, 상기 직교 성분에서 한 개의 크기 (절대치) 신호 및 한 개의 위상 신호가 도출되고 상기 위상 신호에서 그들의 탄젠트(함수)가 형성되고, 탄젠트(함수)는 스테레오-차이 신호의 형성을 위한 크기(절대치) 신호와 곱해지도록 장치가 구성된다.

Description

진폭 복조 방법(Amplitude demodulator)
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 모노 수신의 실시예의 도시.

Claims (6)

  1. 방송 수신기용의 직교 진폭 변조된 스테레오 신호의 복조를 위한 진폭 복조기에 있어서, -수신된 신호에서 디지털 중간 주파수 신호를 생성하고, -디지털 중간 주파수 신호를 베이스 밴드 대역에서 변환하고 여기에서 두개의 직교 성분을 형성하고, -직교 성분에 한 개의 크기(절대치) 신호 및 한 개의 위상 신호를 도출하고, -위상 신호에서 그들의 탄젠트(tan : 함수)를 형성하고, -탄젠트(함수)를 스테레오-차이 신호의 형성을 위해 크기(절대치) 신호와 곱하는 것을 특징으로 하는 진폭 복조기.
  2. 제1항에 있어서, 위상 신호는 탄젠트(함수) 형성 전 베이스 밴드로 변환된 중간 주파 신호의 주파수 및 위상 편차에 관해서 보정되도록 구성되어 있는 것을 특징으로 하는 진폭 복조기.
  3. 제1항에 있어서, 주파수 편차에 관해서 보정을 위해서 위상 신호에서 보정 신호를 빼고, 상기 보정 신호는 위상 신호의 시간 변화의 측정, 계속되는 LPF 필터링 및 LPF 필터링된 신호의 적분에 의해 도출되는 것을 특징으로 하는 진폭 복조기.
  4. 제2항에 있어서, 주파수 편차에 관해서 보정된 위상 신호가 새로운 보정 신호를 빼고, 상기 새로운 보정 신호는 주파수에 관해서 보정된 위상 신호의 LPF 필터링에 의해 도출되는 것을 특징으로 하는 진폭 복조기.
  5. 제2항에 있어서, 주파수 편차에 관해서 이미 보정된 위상 신호에 새로운 보정 신호를 추가하고, 상기 보정 신호는 π만큼 서로 다른 위상 편차에 상응하는 두 개의 다른 레벨을 취할 수 있는 것이고, 새로운 보정 신호는 주파수 편차에 관해서 보정되는 위상 신호의 크기(절대치) 형성 및 LPF 필터링에 의해 그리고 히스테리시스가 추가되고 계속되는 한계치 회로를 실시함으로써 형성되는 것을 특징으로 하는 진폭 복조기.
  6. 제3항에 있어서, 위상 신호의 시간 변화를 나타내는(표시하는) 계속되는 LPF 필터링되는 한 개의 신호에 한 개의 귀환 신호를 부가 중첩하고, 상기 귀환 신호는 스테레오-차이 신호에서 LPF 필터링에 의해 얻어지고, 따라서 주파수 편이(편차)에 관해서 보정된 위상 신호가 리밋터를 거쳐서 탄젠트(함수) 형성을 위해 유도되도록 구성되어 있는 것을 특징으로 하는 진폭 복조기.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019970702129A 1994-09-27 1995-09-08 진폭복조방법 Expired - Fee Related KR100390232B1 (ko)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4434451A DE4434451A1 (de) 1994-09-27 1994-09-27 Amplitudendemodulator
DEP4434451.1 1994-09-27

Publications (2)

Publication Number Publication Date
KR970706648A true KR970706648A (ko) 1997-11-03
KR100390232B1 KR100390232B1 (ko) 2003-10-04

Family

ID=6529283

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019970702129A Expired - Fee Related KR100390232B1 (ko) 1994-09-27 1995-09-08 진폭복조방법

Country Status (7)

Country Link
US (1) US5915028A (ko)
EP (1) EP0783794B1 (ko)
JP (1) JPH10506249A (ko)
KR (1) KR100390232B1 (ko)
DE (2) DE4434451A1 (ko)
ES (1) ES2127549T3 (ko)
WO (1) WO1996010290A1 (ko)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20010048738A1 (en) * 1997-04-03 2001-12-06 Sbc Technology Resourses, Inc. Profile management system including user interface for accessing and maintaining profile data of user subscribed telephony services
JPH1188452A (ja) * 1997-09-02 1999-03-30 Uniden Corp 受信装置および受信信号の復調方法
DE19920362A1 (de) * 1999-05-04 2000-11-09 Philips Corp Intellectual Pty Digitaler AM-Demodulator
DE19960559A1 (de) * 1999-12-15 2001-07-05 Infineon Technologies Ag Empfangsvorrichtung für winkelmodulierte Signale
US7856464B2 (en) * 2006-02-16 2010-12-21 Sigmatel, Inc. Decimation filter
US7453288B2 (en) * 2006-02-16 2008-11-18 Sigmatel, Inc. Clock translator and parallel to serial converter
US7724861B2 (en) * 2006-03-22 2010-05-25 Sigmatel, Inc. Sample rate converter
US7911891B2 (en) * 2006-06-05 2011-03-22 Mediatek Inc. Apparatus for controling servo signal gains of an optical disc drive and method of same
US20070291622A1 (en) * 2006-06-05 2007-12-20 Mediatek Inc. High pass filtering device for an optical disc drive
US7474235B2 (en) * 2006-06-05 2009-01-06 Mediatek Inc. Automatic power control system for optical disc drive and method thereof
US7831001B2 (en) * 2006-12-19 2010-11-09 Sigmatel, Inc. Digital audio processing system and method
US7792220B2 (en) * 2006-12-19 2010-09-07 Sigmatel, Inc. Demodulator system and method
US7577419B2 (en) * 2006-12-19 2009-08-18 Sigmatel, Inc. Digital mixer system and method
US7729461B2 (en) * 2006-12-22 2010-06-01 Sigmatel, Inc. System and method of signal processing
US9349386B2 (en) * 2013-03-07 2016-05-24 Analog Device Global System and method for processor wake-up based on sensor data

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4236042A (en) * 1979-03-12 1980-11-25 Harris Corporation Compatible AM stereo system employing a modified quadrature modulation scheme
JPS57155852A (en) * 1981-03-20 1982-09-27 Sony Corp Stereo reproducing device
US4893316A (en) * 1985-04-04 1990-01-09 Motorola, Inc. Digital radio frequency receiver
JPS62502439A (ja) * 1985-04-04 1987-09-17 モトロ−ラ・インコ−ポレ−テッド ディジタルゼロｉｆ選択段
US5222144A (en) * 1991-10-28 1993-06-22 Ford Motor Company Digital quadrature radio receiver with two-step processing
EP0614587B1 (de) * 1991-11-25 1998-05-20 Siemens Aktiengesellschaft Österreich Demodulationsverfahren mit anwendung einer quadraturmodulation
US5291525A (en) * 1992-04-06 1994-03-01 Motorola, Inc. Symmetrically balanced phase and amplitude base band processor for a quadrature receiver
JP3676363B2 (ja) * 1993-03-24 2005-07-27 ブラウプンクト−ヴェルケ ゲゼルシャフト ミット ベシュレンクテル ハフツング オーディオ信号のマスキングのための信号の導出用回路装置
DE4309518A1 (de) * 1993-03-24 1994-10-06 Blaupunkt Werke Gmbh Schaltungsanordnung zur Ableitung mindestens eines von der Qualität eines empfangenen Signals abhängigen Qualitätssignals
PT642715E (pt) * 1993-03-24 2002-03-28 Blaupunkt Werke Gmbh Receptor radio com processamento digital do sinal
US5606619A (en) * 1993-03-24 1997-02-25 Blaupunkt-Werke Gmbh Circuit arrangement for deriving a signal indicating noise in a received stereo multiplex signal
ES2165386T3 (es) * 1993-03-24 2002-03-16 Blaupunkt Werke Gmbh Receptor de radio con procesamiento digital de las señales.
DE4338700C2 (de) * 1993-11-12 2000-12-21 Blaupunkt Werke Gmbh Schaltungsanordnung zum Erkennen von Nachbarkanalstörungen in einem Stereo-Multiplex-Rundfunkempfänger
DE4340012B4 (de) * 1993-11-24 2004-04-22 Blaupunkt-Werke Gmbh Demodulator
EP0982907B1 (en) * 1994-05-09 2005-03-09 Victor Company Of Japan, Limited Reference subcarrier setting for multicarrier transmission
US5754591A (en) * 1994-08-03 1998-05-19 Broadcom Corporation System for, and method of, processing quadrature amplitude modulated signals
JP3586006B2 (ja) * 1995-09-08 2004-11-10 東芝デジタルメディアエンジニアリング株式会社 Ａｍステレオデコーダ回路
JPH09130148A (ja) * 1995-10-27 1997-05-16 Icom Inc ディジタル復調器
DE59609450D1 (de) * 1996-01-26 2002-08-22 Micronas Gmbh Digitaler Demodulator
US5661433A (en) * 1996-06-27 1997-08-26 Motorola, Inc. Digital FM demodulator

Also Published As

Publication number Publication date
EP0783794A1 (de) 1997-07-16
DE59504441D1 (de) 1999-01-14
EP0783794B1 (de) 1998-12-02
US5915028A (en) 1999-06-22
JPH10506249A (ja) 1998-06-16
DE4434451A1 (de) 1996-03-28
ES2127549T3 (es) 1999-04-16
WO1996010290A1 (de) 1996-04-04
KR100390232B1 (ko) 2003-10-04

Similar Documents

Publication Publication Date Title
KR970706648A (ko) 진폭 복조 방법(Amplitude demodulator)
US4766392A (en) Demodulating an angle-modulated signal
US4013841A (en) Four-channel stereo receiver
KR19990072574A (ko) 디지털ｍｐｘ신호복조기용반송파발생장치
US5521944A (en) Circuit for a demodulator for a radio data signal in a radio receiver
US3971988A (en) AM/FM receiver using spectral parameter estimators
US3866125A (en) Circuit arrangement for a receiver for frequency-modulated signals having variable attenuation phase shifter
JPS56110360A (en) Muting circuit of am stereo receiver
HK32185A (en) Am stereo receiver with correction limiting
CA1130389A (en) Noise protection circuit for am stereo cosine correction factor
US4159396A (en) AM stereo receiver having signal-controlled corrector
US4220818A (en) AM Stereo transmitter
US4105981A (en) Synchronous demodulation device
US4669119A (en) FM stereo receiver
GB2234650A (en) Fm demodulating circuit with improved noise elimination
GB945267A (en) Signal-processing apparatus for an fm/fm multiplex signal
JPH0318377B2 (ko)
ES465050A1 (es) Un receptor de television perfeccionado.
JPS6221090Y2 (ko)
JPH08508142A (ja) 受信した多重信号の音質に依存した音質信号の導出用回路装置
GB753863A (en) Improvements in or relating to fmí¬am receiving circuit-arrangements
JPH0441645Y2 (ko)
JPH0669174B2 (ja) Ａｍステレオ信号デコーダ
US6023614A (en) Method for decoding a suppressed-carrier modulated signal in the presence of a pilot tone, particularly for FM signals
JPS6238370Y2 (ko)

Legal Events

Date Code Title Description
PA0105 International application

Patent event date: 19970327

Patent event code: PA01051R01D

Comment text: International Patent Application

PG1501 Laying open of application
A201 Request for examination
PA0201 Request for examination

Patent event code: PA02012R01D

Patent event date: 20000908

Comment text: Request for Examination of Application

E902 Notification of reason for refusal
PE0902 Notice of grounds for rejection

Comment text: Notification of reason for refusal

Patent event date: 20020626

Patent event code: PE09021S01D

E701 Decision to grant or registration of patent right
PE0701 Decision of registration

Patent event code: PE07011S01D

Comment text: Decision to Grant Registration

Patent event date: 20030401

GRNT Written decision to grant
PR0701 Registration of establishment

Comment text: Registration of Establishment

Patent event date: 20030624

Patent event code: PR07011E01D

PR1002 Payment of registration fee

Payment date: 20030625

End annual number: 3

Start annual number: 1

PG1601 Publication of registration
PR1001 Payment of annual fee

Payment date: 20060615

Start annual number: 4

End annual number: 4

PR1001 Payment of annual fee

Payment date: 20070615

Start annual number: 5

End annual number: 5

PR1001 Payment of annual fee

Payment date: 20080618

Start annual number: 6

End annual number: 6

PR1001 Payment of annual fee

Payment date: 20090612

Start annual number: 7

End annual number: 7

FPAY Annual fee payment

Payment date: 20100617

Year of fee payment: 8

PR1001 Payment of annual fee

Payment date: 20100617

Start annual number: 8

End annual number: 8

LAPS Lapse due to unpaid annual fee
PC1903 Unpaid annual fee

Termination category: Default of registration fee

Termination date: 20120509