Title:
セルラシステムのための時空間スクランブル
Document Type and Number:
Japanese Patent JP5080441
Kind Code:
B2
Abstract:
Techniques for transmitting data with space-time scrambling in cellular systems (e.g., CDMA systems) are described. At least one stream of data symbols is generated, mapped to one or more physical channels, and spread with channelization codes for the physical channels. Space-time scrambling is performed on the at least one stream of data symbols to generate at least two streams of output chips. The space-time scrambling may be achieved by performing matrix multiplication with a sequence of matrices. For each time interval in which space-time scrambling is performed, a matrix may be selected (e.g., based on a scrambling code for a base station), and data to be sent in the time interval is multiplied with the selected matrix. The matrices used for space-time scrambling may be defined and selected in various manners. The streams of output chips are processed and transmitted from respective transmit antennas.
Inventors:
Schotten, Hans Dieter
Walton, Jai Rodney
Walton, Jai Rodney
Application Number:
JP2008502149A
Publication Date:
November 21, 2012
Filing Date:
March 17, 2006
Export Citation:
Assignee:
QUALCOMM INCORPORATED
International Classes:
H04B7/02; H04B1/707; H04B7/06; H04J99/00
Domestic Patent References:
| JP2003152610A | ||||
| JP2001525630A | ||||
| JP2000031939A | ||||
| JP2006514520A | ||||
| JP2002538661A |
Other References:
MEDLES A,Multistream space-time coding by spatial spreading, scrambling and delay diversity,ICASSP,米国,IEEE,2002年 5月13日,V4 OF 4,P.III-2429 - III-2432
Attorney, Agent or Firm:
Makoto Nakamura
Kurata Masatoshi
Takashi Mine
Yoshihiro Fukuhara
Toshio Shirane
Sadao Muramatsu
Nobuhisa Nogawa
Katsu Sunagawa
Ryo Hashimoto
Tetsuya Kazama
Kurata Masatoshi
Takashi Mine
Yoshihiro Fukuhara
Toshio Shirane
Sadao Muramatsu
Nobuhisa Nogawa
Katsu Sunagawa
Ryo Hashimoto
Tetsuya Kazama