CA2361997A1 - Ds-cdma transmission method - Google Patents

Ds-cdma transmission method Download PDF

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Publication number
CA2361997A1
CA2361997A1 CA002361997A CA2361997A CA2361997A1 CA 2361997 A1 CA2361997 A1 CA 2361997A1 CA 002361997 A CA002361997 A CA 002361997A CA 2361997 A CA2361997 A CA 2361997A CA 2361997 A1 CA2361997 A1 CA 2361997A1
Authority
CA
Canada
Prior art keywords
spread
pilot symbols
code
modulator
code channels
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.)
Granted
Application number
CA002361997A
Other languages
French (fr)
Other versions
CA2361997C (en
Inventor
Koichi Okawa
Koji Ohno
Mamoru Sawahashi
Shinji Uebayashi
Yukihiko Okumura
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.)
NTT Docomo Inc
Original Assignee
Ntt Mobile Communications Network Inc.
Koichi Okawa
Koji Ohno
Mamoru Sawahashi
Shinji Uebayashi
Yukihiko Okumura
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 JP8214496A external-priority patent/JPH1051354A/en
Application filed by Ntt Mobile Communications Network Inc., Koichi Okawa, Koji Ohno, Mamoru Sawahashi, Shinji Uebayashi, Yukihiko Okumura filed Critical Ntt Mobile Communications Network Inc.
Publication of CA2361997A1 publication Critical patent/CA2361997A1/en
Application granted granted Critical
Publication of CA2361997C publication Critical patent/CA2361997C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems

Abstract

A DS-CDMA transmission method capable of improving the accuracy of channel estimation using pilot symbols by eliminating cross-correlation between pilot symbols inserted into code channels in CDMA multiplexing carrying out fast signal transmission. In each frame assembler, the pilot symbols, which are used for channel estimation for coherent detection, are inserted into coded information data on code channels at fixed intervals, and then the data is modulated by the modulator. The modulated data symbols in each code channel from the modulator are spread by the spreading modulator, the pilot symbols are spread using a spreading code, whereas the information symbols are spread using different spreading codes assigned to respective code channels. The spread signals of the code channels are summed up by the adder to be transmitted.
CA002361997A 1996-05-30 1997-05-28 Ds-cdma transmission method Expired - Lifetime CA2361997C (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP13661596 1996-05-30
JP136,615/1996 1996-05-30
JP8214496A JPH1051354A (en) 1996-05-30 1996-08-14 Ds-cdma transmission method
JP214,496/1996 1996-08-14
CA002206380A CA2206380C (en) 1996-05-30 1997-05-28 Ds-cdma transmission method

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
CA002206380A Division CA2206380C (en) 1996-05-30 1997-05-28 Ds-cdma transmission method

Publications (2)

Publication Number Publication Date
CA2361997A1 true CA2361997A1 (en) 1997-11-30
CA2361997C CA2361997C (en) 2003-12-02

Family

ID=27170386

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002361997A Expired - Lifetime CA2361997C (en) 1996-05-30 1997-05-28 Ds-cdma transmission method

Country Status (1)

Country Link
CA (1) CA2361997C (en)

Also Published As

Publication number Publication date
CA2361997C (en) 2003-12-02

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Effective date: 20170529