A METHOD OF DS/CDMA USING MULTICARRIER

摘要

PURPOSE: A direct spread code division multiple access method using a multicarrier modulation method is provided to minimize a speed of transmission data and a speed of chip by adapting an access method of IMT-2000, and to improve a reliability of a service by having a space diversity effect, a frequency diversity effect, and a frequency shift diversity effect at the same time. CONSTITUTION: A serial/parallel converter converts serial data into numerous parallel data. Each of numerous parallel data is copied many times, and a divided code is spreaded into by dividing a code according to the number of copied data. A frequency shift diversity is used, and the spreaded data is assigned to a sub carrier wave in order to secure an orthogonality in the time of generation of a frequency shift as much as the sub carrier wave.