Title:
M-ARRAY CODE DIVISION MULTIPLE ACCESS MODEM
Document Type and Number:
Japanese Patent JPH06252879
Kind Code:
A
Abstract:
PURPOSE: To reduce a bit error rate in the M-array code division multiple access MODEM.
CONSTITUTION: A sender side error correction coder is formed by combining an orthogonal coding section 13 and a convolution coder 11 to allow a receiver side to use a trelis line diagram. At a receiver side, a multiplier section 44 multiplies a PN code to a received wave to apply inverse spread and a spread signal is directly inputted to a Viterbi decoder 47 to allow distance calculation in orthogonal codes and a sender side applies interleaving at an interval of symbol to form the trelis line diagram and fading immunity is attained.
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Inventors:
KATO TOSHIO
SATO TAKURO
KAWABE MANABU
KAWAHASHI AKIYOSHI
FUKAZAWA ATSUSHI
SATO TAKURO
KAWABE MANABU
KAWAHASHI AKIYOSHI
FUKAZAWA ATSUSHI
Application Number:
JP3354393A
Publication Date:
September 09, 1994
Filing Date:
February 23, 1993
Export Citation:
Assignee:
OKI ELECTRIC IND CO LTD
International Classes:
H04J13/00; H04J13/12; (IPC1-7): H04J13/00
Attorney, Agent or Firm:
Toshiaki Suzuki