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Title:
FILTER APPARATUS, RECEPTION APPARATUS, TRANSMISSION APPARATUS, DIFFUSION MODULATION APPARATUS, PSEUDO-RANDOM NUMBER SEQUENCE OUTPUT APPARATUS, FILTER METHOD, RECEPTION METHOD, TRANSMISSION METHOD, DIFFUSION MODULATION METHOD, PSEUDO-RANDOM NUMBER SEQUENCE OUTPUT METHOD, AND PROGRAM
Document Type and Number:
WIPO Patent Application WO/2002/078183
Kind Code:
A1
Abstract:
A filter (201) accepts a diffusion code sequence or the like as an input sequence at the chip late 1/D. The diffusion code sequences accepted are successively delayed by a delay circuit (202) connected in series, and delivered. Delay times of the signals constitute an arithmetic progression having a common difference of the chip length D. Diffusion codes of the signals are amplified by an amplifier (203), so that the amplification ratio constitutes a geometric progression having a common ratio r. A total of the amplified signals is calculated by addition by an adder (204) and the addition result is successively output as an output sequence.

Inventors:
Umeno, Ken (10-307, Nanpeidai 8-chome Shibuya-ku, Tokyo, 150-0036, JP)
Shih, Shenghung (1-1-901, Senzoku 1-chome Taito-ku, Tokyo, 111-0031, JP)
Yamaguchi, Akihiro (2-16-202, Mitoma 2-chome Higashi-k, Fukuoka-shi Fukuoka, 811-0201, JP)
Application Number:
PCT/JP2002/002902
Publication Date:
October 03, 2002
Filing Date:
March 26, 2002
Export Citation:
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Assignee:
JAPAN SCIENCE AND TECHNOLOGY CORPORATION (1-8 Honcho 4-chome, Kawaguchi-shi, Saitama, 332-0012, JP)
Umeno, Ken (10-307, Nanpeidai 8-chome Shibuya-ku, Tokyo, 150-0036, JP)
Shih, Shenghung (1-1-901, Senzoku 1-chome Taito-ku, Tokyo, 111-0031, JP)
Yamaguchi, Akihiro (2-16-202, Mitoma 2-chome Higashi-k, Fukuoka-shi Fukuoka, 811-0201, JP)
International Classes:
H03H17/02; H03H17/06; H04B1/707; (IPC1-7): H03H17/06; H04J13/04
Foreign References:
JP2001060937A
JP2001292129A
JPH09244876A
Other References:
CHI-CHUNG CHEN ET AL.: 'Optimal chaotic spread spectrum sequences for uplink CDMA systems, a S-SPCC', 2000, THE IEEE ADAPTIVE SYSTEMS FOR SIGNAL PROCESSING, COMMUNICATIONS AND CONTROL SYMPOSIUM XP002953600 1-4 October 2000, ISBN: 0-7803-5800-7 * page 135 - page 140 *
See also references of EP 1401100A1
CHI-CHUNG CHEN ET AL.: 'Optimal chaotic spread spectrum sequences for uplink CDMA systems' IEEE SYMPOSIUM ON ADAPTIVE SYSTEMS FOR SIGNAL PROCESSING, COMMUNICATIONS, AND CONTROL 01 October 2000, pages 135 - 140
Attorney, Agent or Firm:
Kimura, Mitsuru (7th Floor, Kyohan Building 7, Kandanishiki-cho 2-chom, Chiyoda-ku Tokyo, 101-0054, JP)
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