WiMAX功率控制的实现与上行功率控制算法研究

he power control technology is the key technology in wireless communication systems. The power control algorithm is composed of open-loop power control and close-loop power control, and open-loop power control is the traditional method. An algorithm with variable step is proposed, whose power control step can vary with the change of uplink channel state. but it does not take into account the path loss.This article will apply the path loss to the variable step power control algorithm, making the control of power control accuracy and convergence speed has been greatly enhanced.In addition Estimating of the uplink channel loss and the amount of noise pretreatment of the MS transmit power based on the downlink channel to prepared to adjust transsmion power of MS at once, and then further adjusting the closed loop power control, and finally verifing the improved variable step by the simulation comparison of several algorithms,the power control algorithm has better power control accuracy and convergence rate.