ATE360944T1 - Modulationsschema für tetra-systeme - Google Patents

Modulationsschema für tetra-systeme

Info

Publication number
ATE360944T1
ATE360944T1 AT02740922T AT02740922T ATE360944T1 AT E360944 T1 ATE360944 T1 AT E360944T1 AT 02740922 T AT02740922 T AT 02740922T AT 02740922 T AT02740922 T AT 02740922T AT E360944 T1 ATE360944 T1 AT E360944T1
Authority
AT
Austria
Prior art keywords
modulation scheme
tetra
different modulation
tetra systems
another
Prior art date
Application number
AT02740922T
Other languages
English (en)
Inventor
Peter William Stephens
Original Assignee
Sepura Ltd
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 Sepura Ltd filed Critical Sepura Ltd
Application granted granted Critical
Publication of ATE360944T1 publication Critical patent/ATE360944T1/de

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/20—Modulator circuits; Transmitter circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/20—Modulator circuits; Transmitter circuits
    • H04L27/2032—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner
    • H04L27/2053—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases
    • H04L27/206—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases using a pair of orthogonal carriers, e.g. quadrature carriers
    • H04L27/2067—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases using a pair of orthogonal carriers, e.g. quadrature carriers with more than two phase states
    • H04L27/2075—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases using a pair of orthogonal carriers, e.g. quadrature carriers with more than two phase states in which the data are represented by the change in carrier phase
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/20—Modulator circuits; Transmitter circuits
    • H04L27/2032—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner
    • H04L27/2053—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases
    • H04L27/206—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases using a pair of orthogonal carriers, e.g. quadrature carriers
    • H04L27/2067—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases using a pair of orthogonal carriers, e.g. quadrature carriers with more than two phase states
    • H04L27/2078—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases using a pair of orthogonal carriers, e.g. quadrature carriers with more than two phase states in which the phase change per symbol period is constrained

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Transceivers (AREA)
  • Transmitters (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Vehicle Body Suspensions (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
AT02740922T 2001-06-29 2002-06-28 Modulationsschema für tetra-systeme ATE360944T1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GBGB0116017.5A GB0116017D0 (en) 2001-06-29 2001-06-29 Communications systems

Publications (1)

Publication Number Publication Date
ATE360944T1 true ATE360944T1 (de) 2007-05-15

Family

ID=9917677

Family Applications (2)

Application Number Title Priority Date Filing Date
AT02740922T ATE360944T1 (de) 2001-06-29 2002-06-28 Modulationsschema für tetra-systeme
AT04013415T ATE360945T1 (de) 2001-06-29 2002-06-28 Modulationsverfahren für ein tetra- kommunikationssystem

Family Applications After (1)

Application Number Title Priority Date Filing Date
AT04013415T ATE360945T1 (de) 2001-06-29 2002-06-28 Modulationsverfahren für ein tetra- kommunikationssystem

Country Status (7)

Country Link
EP (2) EP1453266B1 (de)
AT (2) ATE360944T1 (de)
AU (1) AU2002314351A1 (de)
DE (2) DE60219818T2 (de)
ES (2) ES2286532T3 (de)
GB (2) GB0116017D0 (de)
WO (1) WO2003003684A2 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005048551A1 (en) * 2003-10-28 2005-05-26 Sepura Limited Blind modulation detection
EP2269351B1 (de) * 2008-05-01 2014-10-01 Motorola Solutions, Inc. Tetra-DMO-Bereichserweiterung

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0787143A (ja) * 1993-09-09 1995-03-31 Toshiba Corp 符号化変調装置
FR2713423B1 (fr) * 1993-11-30 1996-03-29 Alcatel Telspace Codeur et décodeur différentiels pour la modulation MDP-8 codée en treillis par l'approche pragmatique.
US6014375A (en) * 1997-02-13 2000-01-11 Ericsson Inc. TDMA radio protocol with adaptive vocoder selection
AU5279799A (en) * 1998-06-08 1999-12-30 Nokia Mobile Phones Limited Wireless telecommunications system employing a coherently modulated time slot having a differentially modulated field (cdvcc) providing pilot symbols useful forchannel estimation
US6567475B1 (en) * 1998-12-29 2003-05-20 Ericsson Inc. Method and system for the transmission, reception and processing of 4-level and 8-level signaling symbols
GB0116019D0 (en) * 2001-06-29 2001-08-22 Simoco Digital Systems Ltd Communications system

Also Published As

Publication number Publication date
WO2003003684A2 (en) 2003-01-09
GB0215022D0 (en) 2002-08-07
EP1400082A2 (de) 2004-03-24
DE60219818D1 (de) 2007-06-06
DE60219818T2 (de) 2008-01-17
GB2380103A (en) 2003-03-26
GB0116017D0 (en) 2001-08-22
ES2286259T3 (es) 2007-12-01
GB2380103B (en) 2004-05-19
AU2002314351A1 (en) 2003-03-03
EP1400082B1 (de) 2007-04-25
DE60219786T2 (de) 2008-01-24
ES2286532T3 (es) 2007-12-01
ATE360945T1 (de) 2007-05-15
EP1453266A1 (de) 2004-09-01
WO2003003684A3 (en) 2003-05-30
DE60219786D1 (de) 2007-06-06
EP1453266B1 (de) 2007-04-25

Similar Documents

Publication Publication Date Title
DE60143760D1 (de)
DE60034473D1 (de) Verfahren und einrichtung zur effizienten datenübertragungskontrolle in einem drahtlosen sprache-über-daten kommunikationssystem
ATE439020T1 (de) Übertragungen in einem kommunikationssystem
FI980191A0 (fi) Kvalitetsnivaon i dataoeverfoering stoedande foerfarande
MY123011A (en) Method and system for link adaptation having a variable update interval
EP2056637A3 (de) Verfahren zur Signalisierung von Informationen durch Modifizieren von Modulationskonstellationen
ATE305703T1 (de) Asymmetrische datenübertragung zur verwendung in einer multi-modulationsumgebung
EP1233587A4 (de) Verfahren und einrichtung zur optischen übertragung
ATE463112T1 (de) Verringerung von funkfrequenzstörungen in mehrträgerübertragungssystemen
EP1304820A4 (de) Optischer sender und faseroptisches übertragungssystem damit
WO2003063459A3 (en) Power line communication system combining high bitrate and low bitrate transmissions
BR0205741A (pt) Aparelho e método para determinar um esquema de modulação em um sistema de comunicação
FI20012537A7 (fi) Menetelmä ja järjestelmä langattoman viestimen tehon säätämiseksi ja langaton viestin
AU5774999A (en) Encoding/decoding additional symbols in a communications system
NO995801L (no) Datakommunikasjons- og radiosystem
FR2834404B1 (fr) Procede de securisation deportee d'echange de donnees
DE69903886D1 (de) Verfahren und Vorrichtung zur Datenübertagung über einen Sprachkanal
DE60115952D1 (de) Zuordnung von datenraten in einem gemeinsam genutzten kanal in einem kommunikationssystem
DE60219786D1 (de) Modulationsschema für tetra-systeme
FR2827971B1 (fr) Reseau de communications optiques, multi-utilisateurs, reconfigurable a faible temps de latence
ATE317212T1 (de) Nachrichtenübertragungssystem
DE60306939D1 (de) Modifiziertes DPSK optisches Übertragungssystem
ATE546887T1 (de) Vorrichtung zur zuordnung und spreizung von datensymbolen in mobilnachrichtenübertragungssystemen
FI953198A0 (fi) Järjestelmä langattoman tiedonsiirtoyhteyden muodostamiseksi sekä modulaattori/demodulaattori
GB0130214D0 (en) Supervisory signalling for optical communications equipment

Legal Events

Date Code Title Description
RER Ceased as to paragraph 5 lit. 3 law introducing patent treaties