TRANSCEIVER SYSTEM FOR CDMA MOBILE COMMUNICATION

摘要

PURPOSE: The structure of a transmitter system for CDMA(Code Division Multiple Access) mobile communication is provided to perform a channel coding by using a DSP(Digital Signal Process) chip and to install a spreading part by using a PLD(Programmable Logic Device), so as to analyze the efficiency of the transmitter while changing the structure in a communication system plan process. CONSTITUTION: The first DPRAM(Dual Port RAM)(104) and the second DPRAM(105) respectively store external data like traffic data and external control signals. The first DSP(Digital Signal Process) chip(102) analyzes the external data inputted from the first DPRAM(104) or generates input data. The second DSP chip(103) stores signals necessary for communication in outputs of the second DPRAM(105), and identifies a result of a DPRAM for a deinterleaver. The fourth DPRAM(107) inputs deinterleaver input data(115) outputted from a demodulator through a deinterleaver input data bus, and deinterleaves the inputted data(115), then stores the data(115). A deinterleaver circuit(112) supplies a deinterleaver input address line(113) for deinterleaving the deinterleaver input data(115) and a deinterleaver output address line(114) for outputting the deinterleaved data. A PLD(Programmable Logic Device)(101) inputs outputs of the first DSP chip(102) and the second DSP chip(103), and the channel-coded external data inputted to the third DPRAM(106) and the external control signals passing the fourth DRAM(107), and performs diffusions. The PLD(101) deinterleaves interleaved data inputted from the demodulator, by using the deinterleaver circuit(112) and has a DSP control circuit. A D/A(Digital to Analog) converter(109) converts outputs of the PLD(101) in analog.