Abstract
Power control is an important issue in a direct sequence code division multiple access (DS-CDMA) cellular mobile radio system. Higher communication link quality and better system capacity can not be achieved under fading and interference unless an appropriate power control mechanism is employed. In previous research, there is not a good way to treat the round-trip delay and the uncertainties of interferences and noises in the closed-loop power control problem.In this thesis, a robust Smith prediction filter is proposed to efficiently overcome the round-trip delay problem and override the effect of uncertainties of interferences and noises to achieve a robust signal-to-interference-plus-noise ratio (SINR) tracking from the minimax perspective. A fixed-order smith prediction filter is constructed to achieve this minimax power control performance via genetic algorithm. Finally several simulation results are given to confirm the performance of theproposed method.