WO1999059274A3 - Estimation de la qualite d'un canal radioelectrique - Google Patents

Estimation de la qualite d'un canal radioelectrique Download PDF

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Publication number
WO1999059274A3
WO1999059274A3 PCT/GB1999/001532 GB9901532W WO9959274A3 WO 1999059274 A3 WO1999059274 A3 WO 1999059274A3 GB 9901532 W GB9901532 W GB 9901532W WO 9959274 A3 WO9959274 A3 WO 9959274A3
Authority
WO
WIPO (PCT)
Prior art keywords
sequence
signal
symbol
demodulated
digitally modulated
Prior art date
Application number
PCT/GB1999/001532
Other languages
English (en)
Other versions
WO1999059274A2 (fr
Inventor
Adrian Paul Hillier
Robert Maxwell Frayling-Cork
Original Assignee
Simoco Int Ltd
Adrian Paul Hillier
Frayling Cork Robert Maxwell
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 Simoco Int Ltd, Adrian Paul Hillier, Frayling Cork Robert Maxwell filed Critical Simoco Int Ltd
Priority to AU39417/99A priority Critical patent/AU3941799A/en
Publication of WO1999059274A2 publication Critical patent/WO1999059274A2/fr
Publication of WO1999059274A3 publication Critical patent/WO1999059274A3/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0061—Error detection codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector
    • H04L1/206—Arrangements for detecting or preventing errors in the information received using signal quality detector for modulated signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

L'invention concerne un appareil (1) permettant d'estimer la qualité d'un signal radioélectrique différentiel à modulation numérique par déplacement de phase à quatre états. Ce signal (2) est introduit dans un démodulateur différentiel (3), une séquence de points de constellation à modulation numérique étant démodulée de manière différentielle afin de produire une séquence (4) de points de constellation ou de symboles démodulés dudit signal démodulé. On calcule ensuite l'intensité des énergies instantanées des composants en phase et de phase en quadrature de chaque symbole de cette séquence (4), ce qui permet d'obtenir la valeur instantanée de l'énergie scalaire de chaque symbole échantillonné dudit signal à modulation numérique. On peut donc estimer la qualité de service d'un canal radioélectrique en calculant la variation d'un ensemble d'au moins deux valeurs relatives à l'énergie des symboles, par exemple en considérant la variation de l'ensemble de valeurs de la séquence d'amplitude scalaire.
PCT/GB1999/001532 1998-05-14 1999-05-14 Estimation de la qualite d'un canal radioelectrique WO1999059274A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU39417/99A AU3941799A (en) 1998-05-14 1999-05-14 Radio channel quality estimation

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9810395.5 1998-05-14
GBGB9810395.5A GB9810395D0 (en) 1998-05-14 1998-05-14 Radio channel quality estimation

Publications (2)

Publication Number Publication Date
WO1999059274A2 WO1999059274A2 (fr) 1999-11-18
WO1999059274A3 true WO1999059274A3 (fr) 2000-03-16

Family

ID=10832075

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1999/001532 WO1999059274A2 (fr) 1998-05-14 1999-05-14 Estimation de la qualite d'un canal radioelectrique

Country Status (3)

Country Link
AU (1) AU3941799A (fr)
GB (2) GB9810395D0 (fr)
WO (1) WO1999059274A2 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2367221B (en) * 2000-09-26 2002-10-09 Motorola Inc Method and apparatus for signal quality estimation in a communication system
US20060291591A1 (en) 2005-06-22 2006-12-28 Kaushik Ghosh Estimating bit error probability (BEP) in an edge wireless system
GB2437352B (en) * 2006-04-21 2011-06-29 Tektronix Int Sales Gmbh Constellation patterns
DE102011087745A1 (de) * 2011-12-05 2013-06-06 Sennheiser Electronic Gmbh & Co. Kg Verfahren zum Bestimmen einer Übertragungsqualität beim Empfangen von Audiosignalen

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4653053A (en) * 1984-05-11 1987-03-24 Harris Corporation Performance monitoring of antijam satellite communication network
US5214687A (en) * 1991-06-05 1993-05-25 Nokia Mobile Phones Ltd. Method to determine transmission quality
WO1994028638A1 (fr) * 1993-05-24 1994-12-08 Motorola, Inc. Procede pour ameliorer la qualite d'un message vocal enregistre
US5581651A (en) * 1993-07-06 1996-12-03 Nec Corporation Speech signal decoding apparatus and method therefor
GB2307375A (en) * 1995-11-20 1997-05-21 British Broadcasting Corp Mobile Radio Communication System with Diversity Reception
WO1997041702A1 (fr) * 1996-04-26 1997-11-06 Nokia Telecommunications Oy Procede permettant d'estimer la qualite de connexion, procede de combinaison de diversite et recepteur
US5710986A (en) * 1992-02-05 1998-01-20 Kabushiki Kaisha Toshiba Dual mode radio communication apparatus having function of selectively designating analog or digital mode

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69429274T2 (de) * 1993-09-30 2002-05-23 Conexant Systems Inc Basisstation für ein digitales schnurloses telefon mit mehrfachantennenanordnung

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4653053A (en) * 1984-05-11 1987-03-24 Harris Corporation Performance monitoring of antijam satellite communication network
US5214687A (en) * 1991-06-05 1993-05-25 Nokia Mobile Phones Ltd. Method to determine transmission quality
US5710986A (en) * 1992-02-05 1998-01-20 Kabushiki Kaisha Toshiba Dual mode radio communication apparatus having function of selectively designating analog or digital mode
WO1994028638A1 (fr) * 1993-05-24 1994-12-08 Motorola, Inc. Procede pour ameliorer la qualite d'un message vocal enregistre
US5581651A (en) * 1993-07-06 1996-12-03 Nec Corporation Speech signal decoding apparatus and method therefor
GB2307375A (en) * 1995-11-20 1997-05-21 British Broadcasting Corp Mobile Radio Communication System with Diversity Reception
WO1997041702A1 (fr) * 1996-04-26 1997-11-06 Nokia Telecommunications Oy Procede permettant d'estimer la qualite de connexion, procede de combinaison de diversite et recepteur

Also Published As

Publication number Publication date
GB2337424B (en) 2000-12-13
GB2337424A (en) 1999-11-17
GB9810395D0 (en) 1998-07-15
WO1999059274A2 (fr) 1999-11-18
GB9911284D0 (en) 1999-07-14
AU3941799A (en) 1999-11-29

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