CDMA COMMUNICATION METHOD AND ITS DEVICE

摘要

PURPOSE:To attain multiplex transmission from low speed data till high speed data such as image data without much increase in the scale of the circuit. CONSTITUTION:A basic transmission rate adopts 32kbps higher than a usually used transmission rate of 8kbps, the information needing a rate equal to the basic transmission rate is sent as a frame structure without an idle inter-period and the information needing a transmission rate of 16kbps is sent in a communication channel of frames having an idle period. Furthermore, no information is sent in an idle period other than the communication channel. Thus, the information of other channel is received for an idle period. The information at a high speed such as information whose transmission speed is 128kbps is sent by multiplexing four channels with different spread codes.