Power Control Technology Of CDMA2000 System

CDMA system is an interfere limited communication system because of the especial communications circumstance of the moblie system. It has some serious problem such as "far-near effect", "shadow effect" and "multi-address interfere" that reduce the system capacity and quality. There are a lot of technology to cut down interfere, one is power control. The aim of power control is to decrease those serious problems, increase the capacity and quality of the system, and make sure it will not bring interfere to other users in the same channel.Power control is a core technology in CDMA2000 system; it is an important component of Radio Resource Management.CDMA2000 is rooted IS-95, also is an important component of The Third Wireless Communication. There are more channels in forward and reverse link for CDMA2000, so it is more powerful than IS-95 system. Power control technology of the common and special channel in forward or reverse link is also diversity. And the fast power control is the mainly power control technology in farward link. As the development of the digital technology, the date service of the commnunication become more important. The forward link control of CDMA2000 is more complicated, for there are many differences between date and voice service, then more effective power control technology is needed as well.Neural Network grows very fast recent years, it is applied to many fields by the abstract and simulation from some basic character of the brain and natural neural network. NN is used to research some software simulation and hardware realizaion. And it is also studied in such field as Pattern Recognition,Signal Process,Robot Control and so on. NN has been researched and applied more and more as the developing of itself and correlative theory.Neural Network power control scheme is just based on this theroy. This scheme holds more active real-time than other power control scheme, and it can increase the channel capacity and quaility effectivly, also it make the resource used more reasonably by easing congestion of the local network.