Time division duplex synchronous code division multiple access;  power control;  Signal-to-dry ratio;  Open loop;  Inner ring

According to the characteristics of TD-SCDMA system, based on the method of inner loop power control in the system, an inner loop power control algorithm based on linear prediction parameters is proposed, and the inner loop power control with different channel conditions and different control input parameters is simulated by combining open-loop and outer loop power control. The results show that the algorithm can compensate for the path loss and slow fading, which is beneficial to the improvement of system performance.