Title:
SPREADING CODE ALLOCATING METHOD, DESPREADING METHOD, TRANSMITTER, RECEIVER, COMMUNICATION DEVICE, WIRELESS BASE STATION DEVICE, AND MOBILE TERMINAL
Document Type and Number:
WIPO Patent Application WO/2006/064549
Kind Code:
A1
Abstract:
When a two-dimensional spreading code spreading in the time and frequency directions is allocated to each channel, spreading codes such that at least either their time directions or their frequency directions are orthogonal to one another, the spreading codes which can be despread at spread rates lower than the spread rates of the spreading in their directions are used as the objects to be selected, and spreading codes allocated to the channels are selected from the spreading codes used as the objects to be selected. Thus, the spreading codes to be allocated to the channels are determined.
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Inventors:
SHIMOMURA TSUYOSHI (JP)
KIMURA DAI (JP)
YANO TETSUYA (JP)
KIMURA DAI (JP)
YANO TETSUYA (JP)
Application Number:
PCT/JP2004/018661
Publication Date:
June 22, 2006
Filing Date:
December 14, 2004
Export Citation:
Assignee:
FUJITSU LTD (JP)
SHIMOMURA TSUYOSHI (JP)
KIMURA DAI (JP)
YANO TETSUYA (JP)
SHIMOMURA TSUYOSHI (JP)
KIMURA DAI (JP)
YANO TETSUYA (JP)
International Classes:
H04B1/707; H04J11/00; H04J13/20; H04W76/00; H04W76/02
Foreign References:
| JP2003046481A | 2003-02-14 | |||
| JP2000332724A | 2000-11-30 |
Other References:
KISHIYAMA Y. ET AL: "VSF-OFCDM ni okeru Pilot Channel Kosei no Kento", THE INSTITUTE OF ELECTRONICS, INFORMATION AND COMMUNICATION ENGINEERS GIJUTSU KENKYU HOKOKU, vol. 102, no. 373, 17 October 2002 (2002-10-17), XP002999333
YANG C.-M. ET AL: "2D Orthgonal Spreading Codes for Multicarrier DS-CDMA Systems", ICC '03. IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS, vol. 5, 15 May 2003 (2003-05-15), pages 3277 - 3281, XP010643052
MAEDA N. ET AL: "2 Jigen Kakusan o Mochiiru VSF-OFCDM to Sono Tokusei", THE INSTITUTE OF ELECTRONICS, INFORMATION AND COMMUNICATION ENGINEERS GIJUTSU KENKYU HOKOKU, vol. 102, no. 86, 24 May 2002 (2002-05-24), XP002984651
See also references of EP 1826915A4
YANG C.-M. ET AL: "2D Orthgonal Spreading Codes for Multicarrier DS-CDMA Systems", ICC '03. IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS, vol. 5, 15 May 2003 (2003-05-15), pages 3277 - 3281, XP010643052
MAEDA N. ET AL: "2 Jigen Kakusan o Mochiiru VSF-OFCDM to Sono Tokusei", THE INSTITUTE OF ELECTRONICS, INFORMATION AND COMMUNICATION ENGINEERS GIJUTSU KENKYU HOKOKU, vol. 102, no. 86, 24 May 2002 (2002-05-24), XP002984651
See also references of EP 1826915A4
Attorney, Agent or Firm:
Osuga, Yoshiyuki (Nibancho Bldg. 8-20, Nibanch, Chiyoda-ku Tokyo 84, JP)
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