IT1256471B - Metodo per l'acqisizione del sincronismo tra stazione fissa e apparecchio telefonico portatile in un sistema digitale di telefonia cordless - Google Patents

Metodo per l'acqisizione del sincronismo tra stazione fissa e apparecchio telefonico portatile in un sistema digitale di telefonia cordless

Info

Publication number
IT1256471B
IT1256471B ITMI922796A ITMI922796A IT1256471B IT 1256471 B IT1256471 B IT 1256471B IT MI922796 A ITMI922796 A IT MI922796A IT MI922796 A ITMI922796 A IT MI922796A IT 1256471 B IT1256471 B IT 1256471B
Authority
IT
Italy
Prior art keywords
time slot
synchronism
threshold
digital cordless
acquisition
Prior art date
Application number
ITMI922796A
Other languages
English (en)
Original Assignee
Italtel Spa
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 Italtel Spa filed Critical Italtel Spa
Priority to ITMI922796A priority Critical patent/IT1256471B/it
Publication of ITMI922796A0 publication Critical patent/ITMI922796A0/it
Priority to EP93203321A priority patent/EP0601629A3/en
Publication of ITMI922796A1 publication Critical patent/ITMI922796A1/it
Application granted granted Critical
Publication of IT1256471B publication Critical patent/IT1256471B/it

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
    • H04M1/725—Cordless telephones
    • H04M1/72502—Cordless telephones with one base station connected to a single line
    • H04M1/72505—Radio link set-up procedures
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • H04L7/04—Speed or phase control by synchronisation signals
    • H04L7/041—Speed or phase control by synchronisation signals using special codes as synchronising signal
    • H04L7/042—Detectors therefor, e.g. correlators, state machines
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • H04L7/04—Speed or phase control by synchronisation signals
    • H04L7/041—Speed or phase control by synchronisation signals using special codes as synchronising signal
    • H04L7/046—Speed or phase control by synchronisation signals using special codes as synchronising signal using a dotting sequence

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)

Abstract

Lo scopo della presente invenzione è quello di individuare un metodo per l'acquisizione del sincronismo tra stazione fissa e apparecchio telefonico portatile in un sistema digitale di telefonia cordless.Il metodo consiste nel:- effettuare una ricerca continua sulla funzione di autocorrelazione del segnale ricevuto utilizzando un primo livello di soglia (S1);- determinare l'aggancio del portatile sul time slot che ha originato un picco superiore alla suddetta prima soglia;- limitare la ricezione nelle successive semitrame ad una finestra di ? K bit attorno al picco rilevato, riducendo contemporaneamente la soglia ad un secondo livello S2;- verificare nelle successive semitrame la correttezza del time slot ricevuto a seguito dell'aggancio di cui sopra, analizzando i bit di controllo CRC associati in ciascun time slot ai bit di segnalazione e di traffico. (Fig. 4).
ITMI922796A 1992-12-10 1992-12-10 Metodo per l'acqisizione del sincronismo tra stazione fissa e apparecchio telefonico portatile in un sistema digitale di telefonia cordless IT1256471B (it)

Priority Applications (2)

Application Number Priority Date Filing Date Title
ITMI922796A IT1256471B (it) 1992-12-10 1992-12-10 Metodo per l'acqisizione del sincronismo tra stazione fissa e apparecchio telefonico portatile in un sistema digitale di telefonia cordless
EP93203321A EP0601629A3 (en) 1992-12-10 1993-11-26 Method of acquiring synchronization between a base station and a mobile telephone in a digital cordless telephone system.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITMI922796A IT1256471B (it) 1992-12-10 1992-12-10 Metodo per l'acqisizione del sincronismo tra stazione fissa e apparecchio telefonico portatile in un sistema digitale di telefonia cordless

Publications (3)

Publication Number Publication Date
ITMI922796A0 ITMI922796A0 (it) 1992-12-10
ITMI922796A1 ITMI922796A1 (it) 1994-06-10
IT1256471B true IT1256471B (it) 1995-12-07

Family

ID=11364421

Family Applications (1)

Application Number Title Priority Date Filing Date
ITMI922796A IT1256471B (it) 1992-12-10 1992-12-10 Metodo per l'acqisizione del sincronismo tra stazione fissa e apparecchio telefonico portatile in un sistema digitale di telefonia cordless

Country Status (2)

Country Link
EP (1) EP0601629A3 (it)
IT (1) IT1256471B (it)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI101256B1 (fi) * 1995-10-03 1998-05-15 Nokia Mobile Phones Ltd Menetelmä vastaanotetun signaalin ajoituksen mittaamiseksi tiedonsiirtojärjestelmässä ja menetelmän toteuttava matkaviestin
CN1297085C (zh) * 1996-01-03 2007-01-24 国际商业机器公司 实现多模式无线光通信的健壮方法和装置
FR2745134B1 (fr) * 1996-02-19 1998-04-24 Matra Communication Procede d'etablissement d'une communication entre des terminaux mobiles d'un reseau de radiocommunication numerique
US5805646A (en) * 1996-10-08 1998-09-08 Ericsson Inc. Synchronization method, and associated circuitry, for improved synchronization of a receiver with a transmitter using early-late testing during coarse synchronization
US6618458B1 (en) * 1999-01-29 2003-09-09 Nec Corporation Method and apparatus for signal receiving synchronization
GB9917272D0 (en) * 1999-07-22 1999-09-22 Simoco Int Ltd Communications system
EP1130793A1 (en) * 2000-03-03 2001-09-05 Alcatel A method of synchronizing a radio terminal of a radio communication network and a corresponding radio terminal
DE10126420A1 (de) * 2001-05-31 2002-12-05 Philips Corp Intellectual Pty Verfahren zum Synchronisieren einer Mobilstation mit einer Feststation

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4688218A (en) * 1981-07-15 1987-08-18 Etablissement Public De Diffusion Dit "Telediffusion De France" Multiplex channels for continuous flow for numerical signal
DE3201934A1 (de) * 1982-01-22 1983-08-04 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt System zur uebertragung von digitalen informatonssignalen
FR2559629B1 (fr) * 1984-02-15 1986-06-13 Telediffusion Fse Systeme de radiodiffusion de donnees, notamment vers des postes mobiles
JP2508090B2 (ja) * 1987-05-28 1996-06-19 日本電気株式会社 ディジタル通信装置
EP0463752A3 (en) * 1990-06-29 1993-02-03 Digital Equipment Corporation Pattern matching circuit

Also Published As

Publication number Publication date
ITMI922796A0 (it) 1992-12-10
EP0601629A2 (en) 1994-06-15
ITMI922796A1 (it) 1994-06-10
EP0601629A3 (en) 1994-12-28

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Effective date: 19951219