TDD-CDMA系统中基于业务活动因子的功率控制算法  

A Power Control Algorithm Based on Service Factor for TDD-CDMA System

作　　者：陈波[1] 戎蒙恬[1] 

机构地区：[1]上海交通大学电子工程系,上海200240

出　　处：《微电子学与计算机》2008年第4期86-89,共4页Microelectronics & Computer

基　　金：国家自然科学基金项目(60521002);科技部国家科技攻关计划项目(2005BA908B02)

摘　　要：功率控制技术是CDMA系统克服远近效应、降低多址干扰的一项关键技术.TDD-CDMA系统所要提供的网络业务更多的是基于突发模式的通信,包括各种速率的实时和非实时业务.分析了突发模式业务的统计特性,根据马尔可夫调制贝努利过程,提出了一种基于业务活动因子的功率控制算法,并给出了相应的功率控制模型.通过建立功能模型,验证和评估了提出的功率控制算法.仿真结果表明,这一新的功率控制算法能够更准确地估计干扰信号强度,加快功率控制的收敛,从而提高能量效率和系统容量.Power control is a key technique in CDMA mobile system to combat near-far effect and reduce multiple access interference. The services supported by TDD-CDMA mobile network are mainly in burst-mode, including real-time and non-real-time services in multi-rate. The statistical properties of burst-mode services are analyzed. A power control algorithm based on service factor is proposed according to Markov Modulated Bernoulli process. A function model was developed to verify the new algorithm and evaluate its performance. Tests show that the new power control algorithm can estimate the interference signal strength more accurately, speed up the convergence of power control, and enhance power efficiency and system capacity.

关 键 词：码分多址 时分双工 功率控制 马尔可夫过程 业务活动因子 

分 类 号：TN929.533[电子电信—通信与信息系统]