APPARATUS AND METHOD FOR EXPANDING CHANNELS IN CDMA SYSTEM

摘要

This present invention relates to an apparatus and method for increasing channel, using multiple modulation of subchannels of low data rates, in a code division multiple access (CDMA) transmit modulator. In order to obtain a plurality of subchannels of low data rates within a traffic channel, a plurality of subchannel encoders are used such that each subchannel data is encoded independently and is then channelized using a plurality of Walsh orthogonal codes. The plurality of channelized subchannel data are combined in a signal and are then transmitted through a traffic channel.