NO943109L - Blokk-spredende, kodedelende fleraksess demodulator med forbedret interferenskansellering - Google Patents

Blokk-spredende, kodedelende fleraksess demodulator med forbedret interferenskansellering

Info

Publication number
NO943109L
NO943109L NO943109A NO943109A NO943109L NO 943109 L NO943109 L NO 943109L NO 943109 A NO943109 A NO 943109A NO 943109 A NO943109 A NO 943109A NO 943109 L NO943109 L NO 943109L
Authority
NO
Norway
Prior art keywords
block
spreading
code
correlation value
data
Prior art date
Application number
NO943109A
Other languages
English (en)
Other versions
NO943109D0 (no
Inventor
Atsushi Fukasawa
Manabu Kawabe
Akiyoshi Kawahashi
Takuro Sato
Original Assignee
Oki Electric Ind Co 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 Oki Electric Ind Co Ltd filed Critical Oki Electric Ind Co Ltd
Publication of NO943109D0 publication Critical patent/NO943109D0/no
Publication of NO943109L publication Critical patent/NO943109L/no

Links

Classifications

    • 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
    • H04B1/7097—Interference-related aspects
    • H04B1/7103—Interference-related aspects the interference being multiple access interference
    • H04B1/7107—Subtractive interference cancellation
    • H04B1/71075—Parallel interference cancellation

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Noise Elimination (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

I et blokk-spredende, kode-delende, fler-aksess kommunikasjonssystem lagrer en demodulator mottatt brikke (chip) data l et separat hukommelseområde for hver sendende stasjon. Hvert område har en kapasitet Ilk minst to blokker. Når en fullstendig blokk mottas fra en sendende stasjon, blir samtlige datablokker som er lagret l det korresponderende hukommelseområdet korrelert mot et sett av produktkodeord, hvilke oppnås ved å spre et sett av ortogonale kodeord ved hjelp av den sendende stasjonens sprednlngskode, for å finne det kodeord som gir den maksimale korrelasjonsverdl. For den eldste blokken blir denne korrelasjonsverdl og Informasjon som Indentlflserer kodeordet utmatet. For samtlige blokker anvendes den maksimale korrelasjons- verdlen og det korresponderende produktkodeordet til å beregne Interferenskorrigerlngsdat, hvilke subtraheres fra data l andre hukommelseområder.
NO943109A 1993-08-31 1994-08-23 Blokk-spredende, kodedelende fleraksess demodulator med forbedret interferenskansellering NO943109L (no)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21541793A JP2732783B2 (ja) 1993-08-31 1993-08-31 符号分割多元接続復調装置

Publications (2)

Publication Number Publication Date
NO943109D0 NO943109D0 (no) 1994-08-23
NO943109L true NO943109L (no) 1995-03-01

Family

ID=16671996

Family Applications (1)

Application Number Title Priority Date Filing Date
NO943109A NO943109L (no) 1993-08-31 1994-08-23 Blokk-spredende, kodedelende fleraksess demodulator med forbedret interferenskansellering

Country Status (5)

Country Link
US (1) US5463660A (no)
EP (1) EP0641100B1 (no)
JP (1) JP2732783B2 (no)
DE (1) DE69432619T2 (no)
NO (1) NO943109L (no)

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JP3143247B2 (ja) * 1993-01-11 2001-03-07 沖電気工業株式会社 符号分割多元接続復調装置

Also Published As

Publication number Publication date
DE69432619T2 (de) 2004-04-01
JP2732783B2 (ja) 1998-03-30
EP0641100A2 (en) 1995-03-01
JPH0774724A (ja) 1995-03-17
EP0641100B1 (en) 2003-05-07
EP0641100A3 (en) 1995-03-29
DE69432619D1 (de) 2003-06-12
US5463660A (en) 1995-10-31
NO943109D0 (no) 1994-08-23

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