ES2142026T3 - Sistema de cancelacion de interferencias para las transmisiones de retorno de television por cable. - Google Patents

Sistema de cancelacion de interferencias para las transmisiones de retorno de television por cable.

Info

Publication number
ES2142026T3
ES2142026T3 ES96303690T ES96303690T ES2142026T3 ES 2142026 T3 ES2142026 T3 ES 2142026T3 ES 96303690 T ES96303690 T ES 96303690T ES 96303690 T ES96303690 T ES 96303690T ES 2142026 T3 ES2142026 T3 ES 2142026T3
Authority
ES
Spain
Prior art keywords
signal
interference
return
cancellation system
reference signal
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 - Lifetime
Application number
ES96303690T
Other languages
English (en)
Inventor
Nageen Himayat
Charles A Eldering
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.)
Arris Technology Inc
Original Assignee
Arris Technology Inc
General Instrument 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
Application filed by Arris Technology Inc, General Instrument Corp filed Critical Arris Technology Inc
Application granted granted Critical
Publication of ES2142026T3 publication Critical patent/ES2142026T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00Television systems
    • H04N7/10Adaptations for transmission by electrical cable
    • H04N7/102Circuits therefor, e.g. noise reducers, equalisers, amplifiers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00Television systems
    • H04N7/16Analogue secrecy systems; Analogue subscription systems
    • H04N7/173Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal
    • H04N7/17309Transmission or handling of upstream communications

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Noise Elimination (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Near-Field Transmission Systems (AREA)

Abstract

UN SISTEMA DE CANCELACION DE INTERFERENCIA PARA CATV REDUCE LA PRESENCIA DE INTERFERENCIAS DE ANCHO DE BANDA ESTRECHO NO DESEADAS, QUE CORROMPEN LAS TRANSMISIONES DE LA SEÑAL DE RETORNO. EL SISTEMA DE CANCELACION ADQUIERE UNA SEÑAL DE REFERENCIA QUE CONTIENE COMPONENTES RELACIONADAS CON LA INTERFERENCIA PRESENTE EN LA SEÑAL DE RETORNO. LA SEÑAL DE REFERENCIA SE PROCESA PARA DERIVAR ESTIMACIONES DE LAS COMPONENTES DE LA INTERFERENCIAS QUE APARECEN EN LA SEÑAL DE RETORNO Y SE GENERA UNA SEÑAL DE CANCELACION. LA SEÑAL DE CANCELACION DE INTERFERENCIA SE COMBINA ENTONCES CON LA SEÑAL DE RETORNO, POR ELLO REDUCE LAS COMPONENTES DE INTERFERENCIA PRESENTES EN ELLA. EL SISTEMA DE CANCELACION DE INTERFERENCIA ESTA DESPLEGADO A UNA CABECERA TERMINAL DE CATV Y SE USAN TECNICAS DE ACCESO MULTIPLE DE DIVISION EN EL TIEMPO (TDMA) PARA LA TRANSMISION DE RETORNO. LA SEÑAL DE REFERENCIA SE DERIVA DE MONITORIZAR INTERVALOS DE TIEMPOS DENTRO DE UNA TRAMA TDMA QUE CONTIENE DATOS DE TRANSMISION PREDETERMINADOS.PREFERIBLEMENTE LOS DATOS PREDETERMINADOS SON LA AUSENCIA DE LOS DATOS QUE RESULTAN EN UN INTERVALO DE TIEMPO LIBRE. ESTOS INTERVALOS DE TIEMPO PUEDEN ESTAR TEMPORALMENTE LIBRES, O PUEDEN DELIBERADAMENTE SER DEJADOS SIN USO PARA PROPORCIONAR UNA VENTANA PARA UNA COMPONENTE DE SOLO RUIDO DE LA SEÑAL DE RETORNO. LA SEÑAL OBTENIDA DE ESA MANERA SE PASA A TRAVES DE LA MISMA ETAPA DE PROCESAMIENTO DE RF COMO LA SEÑAL DE RETORNO COMPUESTA Y SUBSTANCIALMENTE MUESTREADA Y DIGITALIZADA. DESPUES, SE APLICAN TECNICAS DE ESTIMACION DE ESPECTROS A LAS MUESTRAS DE LA SEÑAL, PARA DETERMINAR LAS FRECUENCIAS DE LAS SEÑALES QUE INTERFIEREN. UNA VEZ QUE SE OBTIENE UNA ESTIMACION DE LAS FRECUENCIAS DE INTERFERENCIA DEL ESPECTRO, LA SEÑAL DE REFERENCIA QUE COMPRENDE LAS MISMAS FRECUENCIAS PUEDEN SER SINTETIZADAS.
ES96303690T 1995-06-07 1996-05-23 Sistema de cancelacion de interferencias para las transmisiones de retorno de television por cable. Expired - Lifetime ES2142026T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/473,755 US5742591A (en) 1995-06-07 1995-06-07 Interference cancellation system for CATV return transmissions

Publications (1)

Publication Number Publication Date
ES2142026T3 true ES2142026T3 (es) 2000-04-01

Family

ID=23880839

Family Applications (1)

Application Number Title Priority Date Filing Date
ES96303690T Expired - Lifetime ES2142026T3 (es) 1995-06-07 1996-05-23 Sistema de cancelacion de interferencias para las transmisiones de retorno de television por cable.

Country Status (6)

Country Link
US (1) US5742591A (es)
EP (1) EP0748120B1 (es)
AT (1) ATE188828T1 (es)
CA (1) CA2176409C (es)
DE (1) DE69606095T2 (es)
ES (1) ES2142026T3 (es)

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US7724848B2 (en) * 2005-07-26 2010-05-25 Data Device Corporation Predictive signal cancellation for extracting 1 Mb/s MIL-STD-1553 component from composite high performance 1553 signal
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US7907690B2 (en) * 2006-10-17 2011-03-15 Edgewater Computer Systems, Inc. Interference cancellation system and method using impulse response
US7822126B2 (en) * 2006-08-10 2010-10-26 Edgewater Computer Systems, Inc. Interference cancellation system and method
US10162782B2 (en) 2006-05-22 2018-12-25 Edgewater Computer Systems, Inc. Data communications system and method of data transmission
US8135058B2 (en) 2008-10-10 2012-03-13 Csr Technology Inc. Adaptive known signal canceller
US9647851B2 (en) 2008-10-13 2017-05-09 Ppc Broadband, Inc. Ingress noise inhibiting network interface device and method for cable television networks
EP2415260A1 (en) 2009-04-01 2012-02-08 David Zilberberg System for reducing noise in a catv home amplifier upstream path and a method thereof
US8588724B2 (en) * 2009-08-20 2013-11-19 Alfred E. Mann Foundation For Scientific Research Optimal narrowband interference removal for signals separated in time
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US9059786B2 (en) * 2011-07-07 2015-06-16 Vecima Networks Inc. Ingress suppression for communication systems
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BR112015008675A2 (pt) 2012-10-17 2017-07-04 Ppc Broadband Inc dispositivo de interface de rede
US10044490B2 (en) * 2013-11-14 2018-08-07 Parallel Wireless, Inc. Adjacent channel interference cancellation in multi-channel systems
US10623986B2 (en) * 2015-10-22 2020-04-14 Photonic Systems, Inc. RF signal separation and suppression system and method
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Also Published As

Publication number Publication date
EP0748120A1 (en) 1996-12-11
DE69606095T2 (de) 2000-05-25
US5742591A (en) 1998-04-21
DE69606095D1 (de) 2000-02-17
CA2176409C (en) 2000-08-22
CA2176409A1 (en) 1996-12-08
EP0748120B1 (en) 2000-01-12
ATE188828T1 (de) 2000-01-15

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