Title:
SIGNAL FORMAT IN MULTI-CARRIER CDMA TRANSMISSION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2001/050655
Kind Code:
A1
Abstract:
A multi-carrier CDMA transmission system for performing information multiplex transmission by copying information symbols and arranging them on a frequency axis, multiplying the copied information symbols by diffusion codes on the frequency axis, and using a plurality of sub-carriers having different frequencies, wherein, in a signal format of a transmission signal used when a pilot symbol for estimating variations in a transmission line is inserted for performing synchronous detection, the above pilot symbol consists of a signal format containing a common pilot symbol for estimating a transmission line common to respective users and user-specific individual pilot symbols used for communication on transmission lines different from the above transmission line.
Inventors:
ABETA SADAYUKI (JP)
ATARASHI HIROYUKI (JP)
SAWAHASHI MAMORU (JP)
ATARASHI HIROYUKI (JP)
SAWAHASHI MAMORU (JP)
Application Number:
PCT/JP2000/009315
Publication Date:
July 12, 2001
Filing Date:
December 27, 2000
Export Citation:
Assignee:
NTT DOCOMO INC (JP)
ABETA SADAYUKI (JP)
ATARASHI HIROYUKI (JP)
SAWAHASHI MAMORU (JP)
ABETA SADAYUKI (JP)
ATARASHI HIROYUKI (JP)
SAWAHASHI MAMORU (JP)
International Classes:
H04B1/707; H04J1/00; H04B7/26; H04B17/00; H04B17/309; H04J13/00; H04L5/02; H04L27/26; H04W24/00; H04W28/06; H04W72/04; (IPC1-7): H04J3/04
Domestic Patent References:
| WO1996000471A1 | 1996-01-04 |
Foreign References:
| JPH11514827A | 1999-12-14 | |||
| JPH1028077A | 1998-01-27 | |||
| JP2000201134A | 2000-07-18 |
Other References:
YUKIKO HANADA ET AL.: "OFDM/DS-CDMA packet musen access ni oekru douki kenha", PROCEEDINGS B-5-18 OF GENERAL MEETING, THE INSTITUTE OF ELECTRONICS, INFORMATION AND COMMUNICATION ENGINEERS, 8 March 1999 (1999-03-08), XP002944732
HIROYUKI ARATA ET AL.: "Agari link broad band musen packet densou ni okeru SC/DS-CDMA, MC/DS-CDMA, MC-CDMA houshiki no tokusei hikaku", TECHNICAL RESEARCH REPORT, RCS99-131, THE INSTITUTE OF ELECTRONICS, INFORMATION AND COMMUNICATION ENGINEERS, 15 October 1999 (1999-10-15), XP002944733
HIROYUKI ARATA ET AL.: "Agari link broad band musen packet densou ni okeru SC/DS-CDMA, MC/DS-CDMA, MC-CDMA houshiki no tokusei hikaku", TECHNICAL RESEARCH REPORT, RCS99-131, THE INSTITUTE OF ELECTRONICS, INFORMATION AND COMMUNICATION ENGINEERS, 15 October 1999 (1999-10-15), XP002944733
Attorney, Agent or Firm:
Itoh, Tadahiko (Yebisu Garden Place Tower 20-3 Ebisu 4-chome Shibuya-ku, Tokyo, JP)
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