MX9702496A - Modulador y desmodulador de mac y blv digital. - Google Patents
Modulador y desmodulador de mac y blv digital.Info
- Publication number
- MX9702496A MX9702496A MX9702496A MX9702496A MX9702496A MX 9702496 A MX9702496 A MX 9702496A MX 9702496 A MX9702496 A MX 9702496A MX 9702496 A MX9702496 A MX 9702496A MX 9702496 A MX9702496 A MX 9702496A
- Authority
- MX
- Mexico
- Prior art keywords
- demodulator
- vsb modulator
- digital qam
- digital
- qam
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03C—MODULATION
- H03C3/00—Angle modulation
- H03C3/38—Angle modulation by converting amplitude modulation to angle modulation
- H03C3/40—Angle modulation by converting amplitude modulation to angle modulation using two signal paths the outputs of which have a predetermined phase difference and at least one output being amplitude-modulated
-
- 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
- H03D1/2245—Homodyne or synchrodyne circuits using two quadrature channels
- H03D1/2254—Homodyne or synchrodyne circuits using two quadrature channels and a phase locked loop
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/0008—Modulated-carrier systems arrangements for allowing a transmitter or receiver to use more than one type of modulation
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
- H04L27/38—Demodulator circuits; Receiver circuits
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
- H04L27/38—Demodulator circuits; Receiver circuits
- H04L27/3818—Demodulator circuits; Receiver circuits using coherent demodulation, i.e. using one or more nominally phase synchronous carriers
- H04L27/3836—Demodulator circuits; Receiver circuits using coherent demodulation, i.e. using one or more nominally phase synchronous carriers in which the carrier is recovered using the received modulated signal or the received IF signal, e.g. by detecting a pilot or by frequency multiplication
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/426—Internal components of the client ; Characteristics thereof
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03C—MODULATION
- H03C3/00—Angle modulation
- H03C3/02—Details
- H03C3/04—Means in or combined with modulating stage for reducing amplitude modulation
-
- 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
- H03D1/2245—Homodyne or synchrodyne circuits using two quadrature channels
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D2200/00—Indexing scheme relating to details of demodulation or transference of modulation from one carrier to another covered by H03D
- H03D2200/0001—Circuit elements of demodulators
- H03D2200/0031—PLL circuits with quadrature locking, e.g. a Costas loop
-
- 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
- H03D3/007—Demodulation of angle-, frequency- or phase- modulated oscillations by converting the oscillations into two quadrature related signals
-
- 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
- H03D3/02—Demodulation of angle-, frequency- or phase- modulated oscillations by detecting phase difference between two signals obtained from input signal
- H03D3/24—Modifications of demodulators to reject or remove amplitude variations by means of locked-in oscillator circuits
- H03D3/241—Modifications of demodulators to reject or remove amplitude variations by means of locked-in oscillator circuits the oscillator being part of a phase locked loop
- H03D3/245—Modifications of demodulators to reject or remove amplitude variations by means of locked-in oscillator circuits the oscillator being part of a phase locked loop using at least twophase detectors in the loop
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Power Engineering (AREA)
- Multimedia (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
Un desmodulador/descodificador de datos digital (30) para una señal modulada tanto de amplitud de caudratura (MAC) o banda lateral vestigial (BLV) incluye un detector de cuadratura (32, 33) alimentando a través de filtros digitales (38, 39) a un descodificador (50) que conmuta entre las salidas en fase y de cuadratura de los filtros digitales (38, 39).
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/319,694 US5477199A (en) | 1994-04-05 | 1994-10-07 | Digital quadrature amplitude and vestigial sideband modulation decoding method and apparatus |
US08319694 | 1994-10-07 | ||
PCT/US1995/012220 WO1996011526A1 (en) | 1994-10-07 | 1995-09-29 | Digital qam and vsb modulator and demodulator |
Publications (2)
Publication Number | Publication Date |
---|---|
MXPA97002496A MXPA97002496A (es) | 1998-04-01 |
MX9702496A true MX9702496A (es) | 1998-04-30 |
Family
ID=23243303
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
MX9702496A MX9702496A (es) | 1994-10-07 | 1995-09-29 | Modulador y desmodulador de mac y blv digital. |
Country Status (8)
Country | Link |
---|---|
US (1) | US5477199A (es) |
CN (1) | CN1160461A (es) |
AU (1) | AU3683595A (es) |
BR (1) | BR9509229A (es) |
GB (1) | GB2309141A (es) |
MX (1) | MX9702496A (es) |
TW (1) | TW304315B (es) |
WO (1) | WO1996011526A1 (es) |
Families Citing this family (36)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA2144596A1 (en) * | 1994-04-05 | 1995-10-06 | Richard Prodan | Modulator/demodulator using baseband filtering |
US5715012A (en) * | 1996-03-13 | 1998-02-03 | Samsung Electronics Co., Ltd. | Radio receivers for receiving both VSB and QAM digital HDTV signals |
DE4444870C1 (de) * | 1994-12-16 | 1995-10-26 | Ant Nachrichtentech | Demodulator für ein komplexwertiges Restseitenbandsignal |
US5799037A (en) * | 1996-02-16 | 1998-08-25 | David Sarnoff Research Center Inc. | Receiver capable of demodulating multiple digital modulation formats |
US5959660A (en) * | 1996-08-26 | 1999-09-28 | Hybrid Networks, Inc. | Subchannelization scheme for use in a broadband communications system |
US5815220A (en) * | 1996-08-30 | 1998-09-29 | Texas Instruments Incorporated | Color demodulation for digital television |
US6005640A (en) * | 1996-09-27 | 1999-12-21 | Sarnoff Corporation | Multiple modulation format television signal receiver system |
US5970386A (en) * | 1997-01-27 | 1999-10-19 | Hughes Electronics Corporation | Transmodulated broadcast delivery system for use in multiple dwelling units |
US6370156B2 (en) * | 1997-01-31 | 2002-04-09 | Alcatel | Modulation/demodulation of a pilot carrier, means and method to perform the modulation/demodulation |
US6104908A (en) * | 1997-02-28 | 2000-08-15 | Hughes Electronics Corporation | System for and method of combining signals of combining signals of diverse modulation formats for distribution in multiple dwelling units |
KR100217361B1 (ko) * | 1997-06-30 | 1999-09-01 | 김영환 | Vsb 디지털 복조기 |
DE19731012B4 (de) * | 1997-07-18 | 2006-08-03 | Rohde & Schwarz Gmbh & Co. Kg | Anordnung zum Erzeugen eines restseitenband-modulierten Videosignals mit Restträger für einen Fernsehsender |
US6483381B1 (en) | 1997-10-22 | 2002-11-19 | Jeng-Jye Shau | Signal transmission and receiving methods optimized for integrated circuit implementation |
US6295324B1 (en) | 1997-12-10 | 2001-09-25 | Visteon Global Technologies, Inc. | Signal quality measurement using full-complex FM detector |
GB2332578A (en) * | 1997-12-17 | 1999-06-23 | Motorola Inc | Demodulators for television receivers |
US6351290B1 (en) * | 1998-03-23 | 2002-02-26 | Samsung Electronics Co., Ltd. | Television receiver with separate I-F amplifiers for VSB and QAM digital TV signals that are digitally synchrodyned |
JP2000115263A (ja) | 1998-09-30 | 2000-04-21 | Matsushita Electric Ind Co Ltd | ディジタル放送復調装置 |
US6292518B1 (en) * | 1999-10-21 | 2001-09-18 | General Electric Company | Use of 64-QAM circuitry for receiving and decoding 8-VSB signals |
KR100378793B1 (ko) * | 1999-11-12 | 2003-04-07 | 엘지전자 주식회사 | 디지털 수신기용 vsb 어뎁터 및 디지털 vsb데이터를 디지털 수신기에 제공하는 방법 |
US6630964B2 (en) * | 2000-12-28 | 2003-10-07 | Koninklijke Philips Electronics N.V. | Multi-standard channel decoder for real-time digital broadcast reception |
US6940936B2 (en) * | 2001-11-26 | 2005-09-06 | Thomson Licensing S.A. | Alternate timing signal for a vestigial sideband modulator |
JP3865628B2 (ja) * | 2001-12-17 | 2007-01-10 | 三菱電機株式会社 | Rdsデコーダ |
KR100859868B1 (ko) * | 2002-05-30 | 2008-09-24 | 삼성전자주식회사 | 2개의 파일럿을 이용하여 안정되게 반송파를 복원할 수있는 디지털 방송 수신기의 반송파 복원장치 |
US7139319B2 (en) * | 2003-04-03 | 2006-11-21 | The Boeing Company | Wireless RF link for uncompressed transmission of HDTV signals |
US7535965B2 (en) * | 2003-04-03 | 2009-05-19 | The Boeing Company | Systems and methods for wireless transmission of uncompressed HDTV signals |
CN100356785C (zh) * | 2003-05-30 | 2007-12-19 | 上海交通大学 | 数字地面广播传输中基带oqam信号的生成方法 |
WO2005011223A1 (ja) * | 2003-07-25 | 2005-02-03 | Matsushita Electric Industrial Co., Ltd. | 変調装置、復調装置、変調方法および復調方法 |
US7020121B2 (en) * | 2003-11-17 | 2006-03-28 | Sony Corporation | Method and system for wireless digital multimedia transmission |
KR100692596B1 (ko) * | 2004-05-06 | 2007-03-13 | 삼성전자주식회사 | 수신 성능이 향상된 디지털 방송 송수신 시스템 및 그의신호처리방법 |
US20090059782A1 (en) * | 2007-08-29 | 2009-03-05 | Rgb Systems, Inc. | Method and apparatus for extending the transmission capability of twisted pair communication systems |
US20110166968A1 (en) * | 2010-01-06 | 2011-07-07 | Richard Yin-Ching Houng | System and method for activating display device feature |
US8498542B2 (en) * | 2010-01-21 | 2013-07-30 | Ciena Corporation | Multi-channel optical transceiver with offset quadrature amplitude modulation |
US10985787B1 (en) * | 2020-12-01 | 2021-04-20 | Link Labs, Inc. | System and method for generating phase-coherent signaling when ranging between wireless communications nodes |
US11105917B1 (en) | 2020-12-01 | 2021-08-31 | Link Labs, Inc. | System and method for generating phase-coherent signaling when ranging between wireless communications nodes and to account for phase shift therebetween |
JP2022112832A (ja) * | 2021-01-22 | 2022-08-03 | 東芝テック株式会社 | 通信装置及び通信方法 |
US11412472B1 (en) | 2021-10-15 | 2022-08-09 | Link Labs, Inc. | System and method for generating phase-coherent signaling via calibrated phase synchronization factors among wireless ranging nodes in a phase-based time difference of arrival framework |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3902018A (en) * | 1973-12-03 | 1975-08-26 | Zenith Radio Corp | Multiple channel fm stereo system employing am vestigial sideband subcarrier modulation |
US4253118A (en) * | 1979-07-02 | 1981-02-24 | Zenith Radio Corporation | Synchronous detection system |
US4323924A (en) * | 1980-10-06 | 1982-04-06 | Zenith Radio Corporation | Automatic phase adjusting circuit for a synchronous detector |
CA1182204A (en) * | 1980-10-14 | 1985-02-05 | Carl G. Eilers | Tv sound transmission system |
US4339772A (en) * | 1980-10-14 | 1982-07-13 | Zenith Radio Corporation | TV Sound Transmission system |
US4490743A (en) * | 1982-05-17 | 1984-12-25 | Zenith Electronics Corporation | Intercarrier signal detection circuit for a television receiver |
US4602287A (en) * | 1983-11-21 | 1986-07-22 | Zenith Electronics Corporation | Intermediate frequency filter with Nyquist phase modulation correction |
US5144431A (en) * | 1988-04-04 | 1992-09-01 | Zenith Electronics Corporation | Television signal transmission system with temporal processing |
US5043812A (en) * | 1988-04-04 | 1991-08-27 | Zenith Electronics Corporation | TV signal transmission systems and methods |
US5040063A (en) * | 1988-04-04 | 1991-08-13 | Zenith Electronics Corporation | TV signal transmission systems and methods |
US5136381A (en) * | 1988-04-04 | 1992-08-04 | Zenith Electronics Corporation | TV signal transmission systems and methods |
US5087975A (en) * | 1990-11-09 | 1992-02-11 | Zenith Electronics Corporation | VSB HDTV transmission system with reduced NTSC co-channel interference |
US5181112A (en) * | 1991-03-11 | 1993-01-19 | Zenith Electronics Corporation | Television signal transmission system with carrier offset compensation |
-
1994
- 1994-10-07 US US08/319,694 patent/US5477199A/en not_active Expired - Lifetime
-
1995
- 1995-09-29 MX MX9702496A patent/MX9702496A/es not_active Application Discontinuation
- 1995-09-29 CN CN95195528A patent/CN1160461A/zh active Pending
- 1995-09-29 BR BR9509229A patent/BR9509229A/pt not_active Application Discontinuation
- 1995-09-29 GB GB9706639A patent/GB2309141A/en not_active Withdrawn
- 1995-09-29 WO PCT/US1995/012220 patent/WO1996011526A1/en active IP Right Grant
- 1995-09-29 AU AU36835/95A patent/AU3683595A/en not_active Abandoned
- 1995-10-09 TW TW084110613A patent/TW304315B/zh active
Also Published As
Publication number | Publication date |
---|---|
TW304315B (es) | 1997-05-01 |
CN1160461A (zh) | 1997-09-24 |
US5477199A (en) | 1995-12-19 |
AU3683595A (en) | 1996-05-02 |
WO1996011526A1 (en) | 1996-04-18 |
GB2309141A (en) | 1997-07-16 |
BR9509229A (pt) | 1998-01-27 |
GB9706639D0 (en) | 1997-05-21 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FA | Abandonment or withdrawal |