GB2326069B - Demodulating digital video broadcast signals - Google Patents

Demodulating digital video broadcast signals

Info

Publication number
GB2326069B
GB2326069B GB9809585A GB9809585A GB2326069B GB 2326069 B GB2326069 B GB 2326069B GB 9809585 A GB9809585 A GB 9809585A GB 9809585 A GB9809585 A GB 9809585A GB 2326069 B GB2326069 B GB 2326069B
Authority
GB
Grant status
Grant
Patent type
Prior art keywords
digital video
broadcast signals
video broadcast
demodulating digital
demodulating
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
GB9809585A
Other versions
GB2326069A (en )
GB9809585D0 (en )
Inventor
Oliver Paul Haffenden
Christopher Keith Perry Clarke
Justin David Mitchell
Philippe Sadot
Jonathan Highton Stott
Adrian Paul Robinson
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.)
British Broadcasting Corp
LSI Corp
Original Assignee
British Broadcasting Corp
LSI Corp
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
Grant date

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/004Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056Systems characterized by the type of code used
    • H04L1/0071Use of interleaving
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/004Arrangements for detecting or preventing errors in the information received by using forward error control
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00Baseband systems
    • H04L25/02Details ; Arrangements for supplying electrical power along data transmission lines
    • H04L25/03Shaping networks in transmitter or receiver, e.g. adaptive shaping networks ; Receiver end arrangements for processing baseband signals
    • H04L25/03006Arrangements for removing intersymbol interference
    • H04L25/03012Arrangements for removing intersymbol interference operating in the time domain
    • H04L25/03019Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception
    • H04L25/03025Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception using a two-tap delay line
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/26Systems using multi-frequency codes
    • H04L27/2601Multicarrier modulation systems
    • H04L27/2647Arrangements specific to the receiver
    • H04L27/2655Synchronisation arrangements
    • H04L27/2657Carrier synchronisation
    • H04L27/2659Coarse or integer frequency offset determination and synchronisation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/26Systems using multi-frequency codes
    • H04L27/2601Multicarrier modulation systems
    • H04L27/2647Arrangements specific to the receiver
    • H04L27/2655Synchronisation arrangements
    • H04L27/2657Carrier synchronisation
    • H04L27/266Fine or fractional frequency offset determination and synchronisation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/26Systems using multi-frequency codes
    • H04L27/2601Multicarrier modulation systems
    • H04L27/2647Arrangements specific to the receiver
    • H04L27/2655Synchronisation arrangements
    • H04L27/2662Symbol synchronisation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/26Systems using multi-frequency codes
    • H04L27/2601Multicarrier modulation systems
    • H04L27/2647Arrangements specific to the receiver
    • H04L27/2655Synchronisation arrangements
    • H04L27/2668Details of algorithms
    • H04L27/2673Details of algorithms characterised by synchronisation parameters
    • H04L27/2675Pilot or known symbols
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television, VOD [Video On Demand]
    • H04N21/20Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/238Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
    • H04N21/2383Channel coding or modulation of digital bit-stream, e.g. QPSK modulation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television, VOD [Video On Demand]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41Structure of client; Structure of client peripherals
    • H04N21/426Characteristics of or Internal components of the client
    • H04N21/42607Characteristics of or Internal components of the client for processing the incoming bitstream
    • H04N21/4263Characteristics of or Internal components of the client for processing the incoming bitstream involving specific tuning arrangements, e.g. two tuners
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television, VOD [Video On Demand]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network, synchronizing decoder's clock; Client middleware
    • H04N21/438Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving MPEG packets from an IP network
    • H04N21/4382Demodulation or channel decoding, e.g. QPSK demodulation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television, VOD [Video On Demand]
    • H04N21/60Selective content distribution, e.g. interactive television, VOD [Video On Demand] using Network structure or processes specifically adapted for video distribution between server and client or between remote clients; Control signaling specific to video distribution between clients, server and network components, e.g. to video encoder or decoder; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
    • H04N21/61Network physical structure; Signal processing
    • H04N21/6106Network physical structure; Signal processing specially adapted to the downstream path of the transmission network
    • H04N21/6112Network physical structure; Signal processing specially adapted to the downstream path of the transmission network involving terrestrial transmission, e.g. DVB-T
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00Details of television systems
    • H04N5/44Receiver circuitry
    • H04N5/455Demodulation-circuits
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/0014Carrier regulation
    • H04L2027/0024Carrier regulation at the receiver end
    • H04L2027/0026Correction of carrier offset
    • H04L2027/0028Correction of carrier offset at passband only
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/0014Carrier regulation
    • H04L2027/0083Signalling arrangements
    • H04L2027/0087Out-of-band signals, (e.g. pilots)
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/26Systems using multi-frequency codes
    • H04L27/2601Multicarrier modulation systems
    • H04L27/2602Signal structure
    • H04L27/2605Symbol extensions
    • H04L27/2607Cyclic extensions
GB9809585A 1997-05-02 1998-05-05 Demodulating digital video broadcast signals Expired - Fee Related GB2326069B (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB9709063A GB9709063D0 (en) 1997-05-02 1997-05-02 Improvements to OFDM symbol synchronization
US5419597 true 1997-07-30 1997-07-30
GB9727113A GB9727113D0 (en) 1997-12-22 1997-12-22 Demodulating digital video broadcast signals
GB9809585A GB2326069B (en) 1997-05-02 1998-05-05 Demodulating digital video broadcast signals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9809585A GB2326069B (en) 1997-05-02 1998-05-05 Demodulating digital video broadcast signals

Publications (3)

Publication Number Publication Date
GB9809585D0 true GB9809585D0 (en) 1998-07-01
GB2326069A true GB2326069A (en) 1998-12-09
GB2326069B true GB2326069B (en) 2002-06-19

Family

ID=27451639

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9809585A Expired - Fee Related GB2326069B (en) 1997-05-02 1998-05-05 Demodulating digital video broadcast signals

Country Status (1)

Country Link
GB (1) GB2326069B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3304914B2 (en) * 1999-03-31 2002-07-22 日本電気株式会社 Frequency correction method
US7349667B2 (en) * 2001-10-19 2008-03-25 Texas Instruments Incorporated Simplified noise estimation and/or beamforming for wireless communications
US20060159194A1 (en) * 2005-01-20 2006-07-20 Texas Instruments Incorporated Scalable pre-channel estimate phase corrector, method of correction and MIMO communication system employing the corrector and method
US8208522B2 (en) * 2008-03-07 2012-06-26 Nokia Corporation System and methods for receiving OFDM symbols having timing and frequency offsets

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995019671A1 (en) * 1994-01-18 1995-07-20 Telia Ab Method and arrangement for synchronization in ofdm modulation
EP0683576A1 (en) * 1994-05-20 1995-11-22 Hitachi, Ltd. An OFDM digital broadcasting system, and a transmission system and a receiving system used for digital broadcasting
EP0762703A1 (en) * 1995-08-21 1997-03-12 France Telecom Multicarrier demodulation with reduction of white frequency distortion
EP0762702A1 (en) * 1995-08-21 1997-03-12 France Telecom Method and apparatus for demodulating a multicarrier signal, taking a channel response estimate and an estimate of white frequency distortion into account
GB2320871A (en) * 1996-12-28 1998-07-01 Daewoo Electronics Co Ltd Frame synchronization in digital communication systems utilizing OFDM

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995019671A1 (en) * 1994-01-18 1995-07-20 Telia Ab Method and arrangement for synchronization in ofdm modulation
EP0683576A1 (en) * 1994-05-20 1995-11-22 Hitachi, Ltd. An OFDM digital broadcasting system, and a transmission system and a receiving system used for digital broadcasting
EP0762703A1 (en) * 1995-08-21 1997-03-12 France Telecom Multicarrier demodulation with reduction of white frequency distortion
EP0762702A1 (en) * 1995-08-21 1997-03-12 France Telecom Method and apparatus for demodulating a multicarrier signal, taking a channel response estimate and an estimate of white frequency distortion into account
GB2320871A (en) * 1996-12-28 1998-07-01 Daewoo Electronics Co Ltd Frame synchronization in digital communication systems utilizing OFDM

Also Published As

Publication number Publication date Type
GB2326069A (en) 1998-12-09 application
GB9809585D0 (en) 1998-07-01 application

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Legal Events

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

Effective date: 20160505