WIDEBAND DS - CDMA FOR 3RD GENERATION MOBILE COMMUNICATION SYSTEMS
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This paper describes the features and technology of the wideband DS-CDMA system for next generation mobile communication system. The wider the bandwidth, the more the capacity increases. In addition, wide range of data rates from as low as about 4kbps to 2 Mbps can be accommodated by the wideband system, In order to flexibly offer data services with a variety of rates multi-rate codes are employed and four different bandwidths of 1.25, 5, 10, and 20 Mcps are adopted. The system operates in an inter cell asynchronous mode to allow flexible and continuous system deployment from outdoors into indoors. New technologies are developed to enhance the capacity and quality of the wideband DS-CDMA. They are the interference canceler and adaptive antenna array. Exensive measurements and evaluations of a 2-㎓ band DS-CDMA system were carried out under real multipath fading environments.
Abstract
This paper describes the features and technology of the wideband DS-CDMA system for next generation mobile communication system. The wider the bandwidth, the more the capacity increases. In addition, wide range of data rates from as low as about 4kbps to 2 Mbps can be accommodated by the wideband system, In order to flexibly offer data services with a variety of rates multi-rate codes are employed and four different bandwidths of 1.25, 5, 10, and 20 Mcps are adopted. The system operates in an inter cell asynchronous mode to allow flexible and continuous system deployment from outdoors into indoors. New technologies are developed to enhance the capacity and quality of the wideband DS-CDMA. They are the interference canceler and adaptive antenna array. Exensive measurements and evaluations of a 2-㎓ band DS-CDMA system were carried out under real multipath fading environments.