中文摘要：

功率控制是TD—SCDMA系统无线资源管理的核心技术之一，它对保证系统的高质量通信起着至关重要的作用。为了更好的降低系统传输信息的误比特率（BER），本文针对TD—SCDMA系统的功率控制模块，研究一种适用于反向链路的自适应功率控制算法。通过MATLAB软件仿真的方法，在TD—SCDMA物理层仿真平台上对自适应功率控制算法与定步长功率控制算法进行比较，分析了这两种算法的性能特点。仿真结果表明，自适应功率控制算法有着更好的可行性和有效性，在降低传输误比特率和提高系统性能方面有着实际的效果。

英文摘要：

In TD-SCDMA system, power control is one of the key technolo resource management; it plays a significant role in guaranteeing the gies of radio high quality communication of the system. In order to decrease the Bit Error Rate （BER） of transmission information, this paper studies an adaptive power control algorithm for uplink against the power control module of TD-SCDMA system. By the simulation in the software MATLAB, this algorithm and the step size fixed power control algorithm in the physical layer simulation platform of TD-SCDMA system are oompared, and the performance characteristic of the two algorithms is analyzed. Simulation results demonstrate that the adaptive power control algorithm has better feasibility and effectiveness; it has practical effect on decreasing BER and increasing system performance.