Title:
RECEIVER AND METHOD FOR CDMA INVERSE SPREADING USING ROTATED QPSK.PN SEQUENCE
Document Type and Number:
Japanese Patent JP2003110532
Kind Code:
A
Abstract:
To provide a receiver for complex modulation code division encoding signal to use the complex rotation of a complex pseudo noise code for a correlative relation.
In order to obtain a mathematic complex number, a pseudo noise code QPSK (quadrature phase shift keeping) modulated signal is related with rotated one of a conjugate pseudo noise code. The rotation emulates a phase shift in a transfer channel and that rotation is removed without calculating the evaluator of the channel.
Inventors:
SRIRAM SUNDARARAJAN
Application Number:
JP2002224782A
Publication Date:
April 11, 2003
Filing Date:
August 01, 2002
Export Citation:
Assignee:
TEXAS INSTRUMENTS INC
International Classes:
H04L27/22; H04B1/707; H04L27/20; H04B1/709; H04L27/00; (IPC1-7): H04J13/00; H04L27/22
Attorney, Agent or Firm:
Akira Asamura (3 outside)