Wideband Code Division Multiplexing Wireless Digital Transmission Systems With Key Technology Research And Implementation

With the development of new technology in communication and information processing fields, the wireless transmission techniques, which can provide large capacity, high speed and multi-service data transmitting, have received much attention of academe, industrial community and standardization organizations. The third generation mobile communication system has been the focal point of research in communication field, with its key technology - DSSS/CDMA (directing sequence spread spectrum/coded division multiple access).Some problems of wireless transmission are discussed in the paper, centering on the design of high performance physical channel structure, synchronization technique(acquisition and tracking) and coherent detection technique. The paper presents the key techniques and solutions to realize multi-channel data transmission on the rate of 2.048Mbps. The design methods and implemention schemes presented or proposed in the paper have been proved to be successful in the system realization by the system debug and the results of system tests.