MX9504244A - Metodo y aparato para preparar una corriente de simbolos que se van a transmitir en un canal. - Google Patents

Metodo y aparato para preparar una corriente de simbolos que se van a transmitir en un canal.

Info

Publication number
MX9504244A
MX9504244A MX9504244A MX9504244A MX9504244A MX 9504244 A MX9504244 A MX 9504244A MX 9504244 A MX9504244 A MX 9504244A MX 9504244 A MX9504244 A MX 9504244A MX 9504244 A MX9504244 A MX 9504244A
Authority
MX
Mexico
Prior art keywords
wireless transmission
spread
precoding system
signature
response precoding
Prior art date
Application number
MX9504244A
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 MX9504244A publication Critical patent/MX9504244A/es

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/10—Code generation
    • H04J13/102—Combining codes
    • H04J13/105—Combining codes by extending
    • 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)
  • Detection And Prevention Of Errors In Transmission (AREA)

Abstract

En la presente invencion se describe un método y aparato para preparar una corriente de símbolos de mensaje para la transmision inalámbrica al precodificarla a través de la convolucion con una "firma" o "señal de identificacion" característica y símbolo predeterminados que identifican a un usuario en particular en el sistema del mensaje. La duracion en tiempo de la firma debe exceder al intervalo entre símbolos de la corriente de mensaje, a fin de reducir la probabilidad de error provocada por el desvanecimiento en el canal de transmision.
MX9504244A 1994-10-11 1995-10-06 Metodo y aparato para preparar una corriente de simbolos que se van a transmitir en un canal. MX9504244A (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/321,292 US5625642A (en) 1994-10-11 1994-10-11 Spread-response precoding system having signature sequences longer than the inter-symbol time interval

Publications (1)

Publication Number Publication Date
MX9504244A true MX9504244A (es) 1997-01-31

Family

ID=23250000

Family Applications (1)

Application Number Title Priority Date Filing Date
MX9504244A MX9504244A (es) 1994-10-11 1995-10-06 Metodo y aparato para preparar una corriente de simbolos que se van a transmitir en un canal.

Country Status (6)

Country Link
US (1) US5625642A (es)
EP (1) EP0707387B1 (es)
JP (1) JP3217948B2 (es)
CA (1) CA2156757C (es)
DE (1) DE69532316T2 (es)
MX (1) MX9504244A (es)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6678311B2 (en) 1996-05-28 2004-01-13 Qualcomm Incorporated High data CDMA wireless communication system using variable sized channel codes
US6741643B1 (en) * 1998-04-15 2004-05-25 Telecommunications Research Laboratories Asymmetric equalization system for data transmission
KR100267706B1 (ko) * 1998-07-24 2000-10-16 윤덕용 부호 분할 다중 접속 시스템의 서명 수열 배정 방법
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
US8463255B2 (en) * 1999-12-20 2013-06-11 Ipr Licensing, Inc. Method and apparatus for a spectrally compliant cellular communication system
US7580488B2 (en) * 2000-11-29 2009-08-25 The Penn State Research Foundation Broadband modulation/demodulation apparatus and a method thereof
KR100896684B1 (ko) * 2004-01-27 2009-05-14 삼성전자주식회사 수신 성능이 향상된 디지털 방송 송수신 시스템 및 그의신호처리방법
EP1566914A3 (de) * 2004-02-18 2011-05-04 Siemens Aktiengesellschaft Verfahren zum Verbessern der Qualität einer Sprachübertragung über eine Luftschnittstelle
KR100692596B1 (ko) * 2004-05-06 2007-03-13 삼성전자주식회사 수신 성능이 향상된 디지털 방송 송수신 시스템 및 그의신호처리방법
FR2936593B1 (fr) * 2008-09-26 2010-10-15 Guilbert Express Sa Generateur d'air chaud

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5031173A (en) * 1989-08-15 1991-07-09 Unisys Corporation Decoder for added asynchronous bit sequences
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.
DE59106942D1 (de) * 1990-11-22 1996-01-04 Ascom Tech Ag Mehrfachzugriffsverfahren und Mobilfunksystem zur Durchführung des Mehrfachzugriffsverfahrens.
AU636190B2 (en) * 1991-01-21 1993-04-22 Nec Corporation Spread packet communication system
US5467367A (en) * 1991-06-07 1995-11-14 Canon Kabushiki Kaisha Spread spectrum communication apparatus and telephone exchange system
EP0578313B1 (fr) * 1992-07-08 1998-12-02 Laboratoires D'electronique Philips S.A.S. Codage enchaíné, pour la transmission OFDM
JP2726220B2 (ja) * 1993-07-05 1998-03-11 沖電気工業株式会社 符号分割多元接続装置
US5570351A (en) * 1994-10-11 1996-10-29 Lucent Technologies Inc. Multi-user communication system employing spread signatures

Also Published As

Publication number Publication date
JPH08256083A (ja) 1996-10-01
US5625642A (en) 1997-04-29
JP3217948B2 (ja) 2001-10-15
EP0707387B1 (en) 2003-12-17
DE69532316D1 (de) 2004-01-29
EP0707387A3 (en) 2000-06-07
CA2156757C (en) 1999-04-27
CA2156757A1 (en) 1996-04-12
EP0707387A2 (en) 1996-04-17
DE69532316T2 (de) 2004-10-21

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