WCDMA系统功率控制策略中的内环SIR测量

Measurement Method of Inner-loop SIR of Transmit Power Control Scheme in WCDMA

功率控制是使CDMA系统容量最大化的关键技术之一 .在IMT 2 0 0 0指定的宽带码分多址接入 (WCD MA)系统中 ,实现高精度的快速闭环功率控制的基础是内环SIR的精确测量 .由此 ,基于 3GPP协议 ,本文提出了一种新的易实现模块化的内环SIR测量的方法 ,在原理和性能上与Shunsuke所提SIR的测量方法进行了比较 ,通过仿真证明了新方法测量性能的优越性 。

TPC (Transmit power control) is one of the key techniques to maximize the capacity of CDMA(Code Division Multiple Access) system.Highly precise measurement of inner loop SIR (instantaneous signal to average interference plus background noise ratio) is the foundation of highly precise fast closed loop TPC in WCDMA (Wideband Code Division Multiple Access) system which is selected as one system for IMT 2000 (International Mobile Telecommunications 2000).This paper proposes a new measurement method of inner loop SIR based on 3GPP (the third Generation Partnership Project) protocols,which is prone to modularization,and compares it with another method brought forward by Shunsuke in principle and performance.It has been proved that the new measurement method has the better performance by means of computer simulation.The performance of fast closed loop TPC based on producing equal QoS (Quality of Service) for all users is also given.