DE60028857D1 - Verfahren und Anordnung zur Abwärtsrichtung-Diversität in CDMA mit Walsh-Codes - Google Patents

Verfahren und Anordnung zur Abwärtsrichtung-Diversität in CDMA mit Walsh-Codes

Info

Publication number
DE60028857D1
DE60028857D1 DE60028857T DE60028857T DE60028857D1 DE 60028857 D1 DE60028857 D1 DE 60028857D1 DE 60028857 T DE60028857 T DE 60028857T DE 60028857 T DE60028857 T DE 60028857T DE 60028857 D1 DE60028857 D1 DE 60028857D1
Authority
DE
Germany
Prior art keywords
walsh codes
mobile
transmit antennas
downlink diversity
transmit
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
DE60028857T
Other languages
English (en)
Other versions
DE60028857T2 (de
Inventor
Michael R Buehrer
Robert Atmaram Soni
Jiann-An Tsai
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nokia of America Corp
Original Assignee
Lucent Technologies 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
Application filed by Lucent Technologies Inc filed Critical Lucent Technologies Inc
Publication of DE60028857D1 publication Critical patent/DE60028857D1/de
Application granted granted Critical
Publication of DE60028857T2 publication Critical patent/DE60028857T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G3/00—Cutting implements specially adapted for horticultural purposes; Delimbing standing trees
    • A01G3/02—Secateurs; Flower or fruit shears
    • A01G3/033—Secateurs; Flower or fruit shears having motor-driven blades
    • A01G3/037—Secateurs; Flower or fruit shears having motor-driven blades the driving means being an electric motor
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G3/00—Cutting implements specially adapted for horticultural purposes; Delimbing standing trees
    • A01G3/02—Secateurs; Flower or fruit shears
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G3/00—Cutting implements specially adapted for horticultural purposes; Delimbing standing trees
    • A01G3/02—Secateurs; Flower or fruit shears
    • A01G3/033—Secateurs; Flower or fruit shears having motor-driven blades
    • 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
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/0007—Code type
    • H04J13/004—Orthogonal
    • H04J13/0048—Walsh
    • 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
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/16—Code allocation
    • H04J13/18—Allocation of orthogonal codes
    • 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
    • H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
    • H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
    • 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
    • H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
    • H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
    • H04L1/0618—Space-time coding
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2201/00—Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
    • H04B2201/69—Orthogonal indexing scheme relating to spread spectrum techniques in general
    • H04B2201/707—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
    • H04B2201/7097—Direct sequence modulation interference
    • H04B2201/709709—Methods of preventing interference
DE60028857T 1999-04-19 2000-04-11 Verfahren und Anordnung zur Abwärtsrichtung-Diversität in CDMA mit Walsh-Codes Expired - Lifetime DE60028857T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/294,661 US6515978B1 (en) 1999-04-19 1999-04-19 Methods and apparatus for downlink diversity in CDMA using Walsh codes
US294661 1999-04-19

Publications (2)

Publication Number Publication Date
DE60028857D1 true DE60028857D1 (de) 2006-08-03
DE60028857T2 DE60028857T2 (de) 2006-12-07

Family

ID=23134378

Family Applications (1)

Application Number Title Priority Date Filing Date
DE60028857T Expired - Lifetime DE60028857T2 (de) 1999-04-19 2000-04-11 Verfahren und Anordnung zur Abwärtsrichtung-Diversität in CDMA mit Walsh-Codes

Country Status (11)

Country Link
US (2) US6515978B1 (de)
EP (2) EP1523120A3 (de)
JP (1) JP4046456B2 (de)
KR (1) KR100556006B1 (de)
CN (1) CN1271219A (de)
AT (1) ATE331356T1 (de)
AU (1) AU2778100A (de)
BR (1) BR0002750A (de)
CA (1) CA2304532C (de)
DE (1) DE60028857T2 (de)
ID (1) ID25575A (de)

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US7593357B2 (en) * 2002-03-28 2009-09-22 Interdigital Technology Corporation Transmit processing using receiver functions
JP3943980B2 (ja) * 2002-04-09 2007-07-11 富士通株式会社 符号分割多元接続通信システムならびに符号分割多元接続通信システムにおける基地局制御装置および基地局
US7203181B2 (en) 2002-06-28 2007-04-10 Interdigital Technology Corporation CDMA system transmission matrix coefficient calculation
KR100452512B1 (ko) * 2002-08-16 2004-10-13 엘지전자 주식회사 채널용량 개선 왈쉬코드 확산장치 및 그 운용방법
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US7869488B2 (en) * 2003-08-28 2011-01-11 Qualcomm Incorporated Method and apparatus for removing code aliases when using short synchronization codes
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US7623467B1 (en) * 2003-09-17 2009-11-24 Atheros Communications, Inc. Wireless channel estimation
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Also Published As

Publication number Publication date
EP1047218B1 (de) 2006-06-21
EP1523120A2 (de) 2005-04-13
ATE331356T1 (de) 2006-07-15
ID25575A (id) 2000-10-19
EP1047218A2 (de) 2000-10-25
BR0002750A (pt) 2001-01-30
JP2001028559A (ja) 2001-01-30
CN1271219A (zh) 2000-10-25
EP1523120A3 (de) 2016-08-03
AU2778100A (en) 2000-10-26
US7400614B2 (en) 2008-07-15
KR100556006B1 (ko) 2006-03-03
CA2304532A1 (en) 2000-10-19
EP1047218A3 (de) 2003-09-10
CA2304532C (en) 2007-06-26
JP4046456B2 (ja) 2008-02-13
US20030081656A1 (en) 2003-05-01
US6515978B1 (en) 2003-02-04
DE60028857T2 (de) 2006-12-07
KR20000077044A (ko) 2000-12-26

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