Title:
【発明の名称】符号分割多元接続復調装置
Document Type and Number:
Japanese Patent JP2732783
Kind Code:
B2
Abstract:
In a block-spreading code-division multiple-access communication system a demodulator stores received chip data in a separate memory area for each transmitting station. Each area has a capacity of at least two blocks. When a complete block is received from a transmitting station, all blocks of data stored in the corresponding memory area are correlated against a set of product codewords, which are obtained by spreading a set of orthogonal codewords by the transmitting station's spreading code, to find the codeword that gives the maximum correlation value. For the oldest block, this correlation value and information identifying the codeword are output. For all blocks, the maximum correlation value and corresponding product codeword are used to calculate interference correction data, which are subtracted from the data in other memory areas.
Inventors:
FUKAZAWA ATSUSHI
KAWABE MANABU
KAWAHASHI AKYOSHI
SATO TAKURO
KAWABE MANABU
KAWAHASHI AKYOSHI
SATO TAKURO
Application Number:
JP21541793A
Publication Date:
March 30, 1998
Filing Date:
August 31, 1993
Export Citation:
Assignee:
OKI DENKI KOGYO KK
International Classes:
H04J13/00; H04B1/7107; (IPC1-7): H04J13/04
Domestic Patent References:
| JP6373730A | ||||
| JP2502777A |
Attorney, Agent or Firm:
Kenji Onishi