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MX9504246A - Metodo y aparato para la comunicacion inhalambrica entre multiples usuarios. - Google Patents

Metodo y aparato para la comunicacion inhalambrica entre multiples usuarios.

Info

Publication number
MX9504246A
MX9504246A MX9504246A MX9504246A MX9504246A MX 9504246 A MX9504246 A MX 9504246A MX 9504246 A MX9504246 A MX 9504246A MX 9504246 A MX9504246 A MX 9504246A MX 9504246 A MX9504246 A MX 9504246A
Authority
MX
Mexico
Prior art keywords
communication system
user communication
system employing
employing spread
signatures
Prior art date
Application number
MX9504246A
Other languages
English (en)
Inventor
Gregory W Wornell
Original Assignee
At & T 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 At & T Corp filed Critical At & T Corp
Publication of MX9504246A publication Critical patent/MX9504246A/es

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/0003—Code application, i.e. aspects relating to how codes are applied to form multiplexed channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/0077—Multicode, e.g. multiple codes assigned to one user
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)

Abstract

Se describe un método de transmision y de recepcion, y un aparato especialmente adecuado para sistemas de comunicacion de usuarios multiples tales como sistemas celulares, en los cuales la transmision de vías multiples encuentra características de desvanecimiento variables en el tiempo, en el canal. La precodificacion de la corriente de símbolos de mensaje, mediante la convolucion con secuencias de firma o identificacion predeterminadas para usuarios respectivos, hace posible la separacion de mensajes de usuario respectivos, y combate los efectos del desvanecimiento variable.
MX9504246A 1994-10-11 1995-10-06 Metodo y aparato para la comunicacion inhalambrica entre multiples usuarios. MX9504246A (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/321,297 US5570351A (en) 1994-10-11 1994-10-11 Multi-user communication system employing spread signatures

Publications (1)

Publication Number Publication Date
MX9504246A true MX9504246A (es) 1997-01-31

Family

ID=23250021

Family Applications (1)

Application Number Title Priority Date Filing Date
MX9504246A MX9504246A (es) 1994-10-11 1995-10-06 Metodo y aparato para la comunicacion inhalambrica entre multiples usuarios.

Country Status (5)

Country Link
US (1) US5570351A (es)
EP (1) EP0707386A3 (es)
JP (1) JP3217947B2 (es)
CA (1) CA2156758C (es)
MX (1) MX9504246A (es)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5625642A (en) * 1994-10-11 1997-04-29 Lucent Technologies Inc. Spread-response precoding system having signature sequences longer than the inter-symbol time interval
US6678311B2 (en) 1996-05-28 2004-01-13 Qualcomm Incorporated High data CDMA wireless communication system using variable sized channel codes
FR2774831B1 (fr) * 1998-02-11 2000-04-07 Agence Spatiale Europeenne Recepteur adaptatif de signaux pour systeme de communications a acces pultiples par repartition a codes
JP4288777B2 (ja) * 1999-08-11 2009-07-01 ソニー株式会社 マルチキャリア信号送信装置及びマルチキャリア信号受信装置
US6738368B1 (en) 2000-05-12 2004-05-18 Interdigital Technology Corporation Prioritization and flow control of a spread spectrum multiuser channel
US7580488B2 (en) * 2000-11-29 2009-08-25 The Penn State Research Foundation Broadband modulation/demodulation apparatus and a method thereof
JP2009267930A (ja) * 2008-04-28 2009-11-12 Shinshu Univ 不均一誤り特性を有する情報伝送システム
US20140003470A1 (en) * 2012-06-27 2014-01-02 Qualcomm Incorporated Unified receiver for multi-user detection
US10673676B2 (en) 2017-07-12 2020-06-02 Qualcomm Incorporated Techniques and apparatuses for multiplexing schemes for millimeter wave downlink single carrier waveforms

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4901307A (en) * 1986-10-17 1990-02-13 Qualcomm, Inc. Spread spectrum multiple access communication system using satellite or terrestrial repeaters
US4809295A (en) * 1987-04-20 1989-02-28 Unisys Corporation Code lengthening system
US5031173A (en) * 1989-08-15 1991-07-09 Unisys Corporation Decoder for added asynchronous bit sequences
US5103459B1 (en) * 1990-06-25 1999-07-06 Qualcomm Inc System and method for generating signal waveforms in a cdma cellular telephone system
FR2664113B1 (fr) * 1990-06-28 1993-06-04 Alcatel Transmission Procede de transmission numerique a etalement de spectre par sequence directe a changement de sequences en cours de transmission, et emetteur et recepteur le mettant en óoeuvre.
EP0486834B1 (de) * 1990-11-22 1995-11-22 Ascom Tech Ag Mehrfachzugriffsverfahren und Mobilfunksystem zur Durchführung des Mehrfachzugriffsverfahrens

Also Published As

Publication number Publication date
CA2156758A1 (en) 1996-04-12
CA2156758C (en) 1999-11-23
EP0707386A3 (en) 2000-06-07
JPH08256082A (ja) 1996-10-01
JP3217947B2 (ja) 2001-10-15
US5570351A (en) 1996-10-29
EP0707386A2 (en) 1996-04-17

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