NO20001026L - Praktisk mÕte for Õ øke overføringskapasiteten i et radiosambandsnett for CDMA - Google Patents

Praktisk mÕte for Õ øke overføringskapasiteten i et radiosambandsnett for CDMA

Info

Publication number
NO20001026L
NO20001026L NO20001026A NO20001026A NO20001026L NO 20001026 L NO20001026 L NO 20001026L NO 20001026 A NO20001026 A NO 20001026A NO 20001026 A NO20001026 A NO 20001026A NO 20001026 L NO20001026 L NO 20001026L
Authority
NO
Norway
Prior art keywords
downlink
signal
practical way
approach
cdma
Prior art date
Application number
NO20001026A
Other languages
English (en)
Other versions
NO20001026D0 (no
Inventor
Shimon B Scherzer
Original Assignee
Adaptive Telecom Inc
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
Priority claimed from US08/929,638 external-priority patent/US6108565A/en
Application filed by Adaptive Telecom Inc filed Critical Adaptive Telecom Inc
Publication of NO20001026D0 publication Critical patent/NO20001026D0/no
Publication of NO20001026L publication Critical patent/NO20001026L/no

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0891—Space-time diversity
    • H04B7/0897—Space-time diversity using beamforming per multi-path, e.g. to cope with different directions of arrival [DOA] at different multi-paths
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0408—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas using two or more beams, i.e. beam diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0491—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas using two or more sectors, i.e. sector diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
    • H04B7/0842—Weighted combining
    • H04B7/086—Weighted combining using weights depending on external parameters, e.g. direction of arrival [DOA], predetermined weights or beamforming

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Radio Transmission System (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radio Relay Systems (AREA)
  • Circuits Of Receivers In General (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Electrotherapy Devices (AREA)
  • Transmitters (AREA)
  • Transceivers (AREA)

Abstract

Praktisk måte å forbedre signalkvaliteten (bærer/inter- ferens, C/I) på, både i forover- og retursignalveien in- nenfor et trådløst punkt/flerpunkts CDMA-samband, ved hjelp av grunnleggende radioretningsbestem- melsesteknikk for å tillate optimal flerveiskombi- nasjon (diversitet) hvor man bruker et antennesystem (et array) med mange elementer. Det hele gjøres en- kelt ved å bruke meget små binærsiffertrinn og en aritmetisk kapitalisering til den endelige alfabetiske signalstruktur, f.eks. ved hjelp av Walsh-symboler i henhold til CDMA-kommunikasjonsstandarden IS-95 eller en kjent læringssekvens. Alternativt kan man bruke flytkommavisning. Fremgangsmåten gjør det lett å implementere ASIC for derved å muliggjøre spredt signalbehandling for å komme frem til ønsket resultat. Særlig brukes data i foroverkanalen til å be- stemme retursignalenes romstruktur (via antennesy- stemets fordelte stråler) for å forbedre ytelse og kapa- sitet. Optimalisering til IS-95 foretrekkes, men ethvert signal som enten har et endelig alfabet eller en lærese- kvens kan bruke samme idé. Bruk av den kjente sig: nalstruktur gjør det lettere å bestemme antennerekke- responsvektorer enkelt og unngå kovariansmatrise- beregning og -analyse, og følgelig kan prinsippene også brukes for radiosamband av typen GSM og TDMA.
NO20001026A 1997-09-15 2000-02-29 Praktisk mÕte for Õ øke overføringskapasiteten i et radiosambandsnett for CDMA NO20001026L (no)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
US08/929,638 US6108565A (en) 1997-09-15 1997-09-15 Practical space-time radio method for CDMA communication capacity enhancement
US7147398P 1998-01-13 1998-01-13
US7797998P 1998-03-13 1998-03-13
US9315098P 1998-07-17 1998-07-17
US9734098P 1998-08-20 1998-08-20
PCT/US1998/019299 WO1999014870A2 (en) 1997-09-15 1998-09-15 Practical space-time radio method for cdma communication capacity enhancement

Publications (2)

Publication Number Publication Date
NO20001026D0 NO20001026D0 (no) 2000-02-29
NO20001026L true NO20001026L (no) 2000-05-15

Family

ID=27535886

Family Applications (1)

Application Number Title Priority Date Filing Date
NO20001026A NO20001026L (no) 1997-09-15 2000-02-29 Praktisk mÕte for Õ øke overføringskapasiteten i et radiosambandsnett for CDMA

Country Status (14)

Country Link
EP (1) EP1062746B1 (no)
JP (2) JP4421106B2 (no)
KR (1) KR100650230B1 (no)
CN (1) CN1305230C (no)
AT (1) ATE262757T1 (no)
AU (1) AU9488598A (no)
CA (1) CA2302547C (no)
DE (1) DE69822672T2 (no)
HK (1) HK1032863A1 (no)
ID (1) ID25859A (no)
IL (1) IL135099A0 (no)
NO (1) NO20001026L (no)
PL (1) PL339462A1 (no)
WO (1) WO1999014870A2 (no)

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Also Published As

Publication number Publication date
IL135099A0 (en) 2001-05-20
JP2003521822A (ja) 2003-07-15
DE69822672T2 (de) 2005-02-17
WO1999014870A3 (en) 1999-06-24
HK1032863A1 (en) 2001-08-03
CA2302547A1 (en) 1999-03-25
WO1999014870A2 (en) 1999-03-25
KR20010030605A (ko) 2001-04-16
ID25859A (id) 2000-11-09
DE69822672D1 (de) 2004-04-29
EP1062746B1 (en) 2004-03-24
AU9488598A (en) 1999-04-05
CA2302547C (en) 2005-06-14
JP2010035188A (ja) 2010-02-12
ATE262757T1 (de) 2004-04-15
EP1062746A2 (en) 2000-12-27
CN1305230C (zh) 2007-03-14
NO20001026D0 (no) 2000-02-29
PL339462A1 (en) 2000-12-18
KR100650230B1 (ko) 2006-11-24
JP4421106B2 (ja) 2010-02-24
CN1278971A (zh) 2001-01-03

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