An Adaptive Step-Size Power Control Scheme in WCDMA

CHEN Chao-yang; XI Feng-jun; JIN Xiang-lan; QUAN Qing-yi; ZHANG Ping

您当前的位置：

首页 >

文章列表页 >

An Adaptive Step-Size Power Control Scheme in WCDMA

更新时间：2025-07-16

- An Adaptive Step-Size Power Control Scheme in WCDMA
- Acta Electronica Sinica Vol. 30, Issue 4, Pages: 492-494(2002)
- 作者机构：
  
  北京邮电大学无线新技术研究室,北京,100876
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN929.533
- Published：2002
- 稿件说明：
移动端阅览
CHEN Chao-yang, XI Feng-jun, JIN Xiang-lan, et al. An Adaptive Step-Size Power Control Scheme in WCDMA[J]. Acta Electronica Sinica, 2002, 30(4): 492-494.
DOI：

CHEN Chao-yang, XI Feng-jun, JIN Xiang-lan, et al. An Adaptive Step-Size Power Control Scheme in WCDMA[J]. Acta Electronica Sinica, 2002, 30(4): 492-494. DOI：

摘要

本文提出了一种可应用于WCDMA中的变步长功率控制策略

这种功控策略根据TPC命令的"历史"

将功率控制过程划分为Markov状态

分析信道衰落步长的概率密度

每一状态对应一个确定的步长值

从而可以确定功率控制步长集中的步长数

我们选用概率密度最大的数值

同时考虑硬件可以分辨的最小步长在0.5dB左右

确定步长集.再用仿真的方法

确定状态和步长的对应关系.发射机依据当前的TPC命令决定应该增大还是减小发射功率

依据当前TPC命令和"历史"上的TPC命令选择合适的功率步长

进而确定发射功率.

Abstract

In the wideband code division multiple access (WCDMA) system

fast transmit power control (TPC) should overcome the pathloss caused by fast multipath fading.However

the conventional fixed step size transmit power control (FS-TPC) does not compensate the fading well due to the complexity of fast fading in Rayleigh channel.We propose and evaluate a single-bit adaptive step-size transmit power control (AS-TPC) scheme which can be applied in WCDMA.The new scheme divides the power control process into Markov states according to the received TPC command in "history".On the basis of analysis of the step-size of the channel fading

it chooses step-size according to the largest probability density of step-size of the multipath Rayleigh fading channel with respect to the period of the transmit power control.Each TPC step size is corresponding to a channel Markov states.Considering the power circuit's minimum resolving is about 0.5dB

we can decide the step size set.In this paper

the relationship between the Markov state and the TPC step-size is made out by computer simulation.The transmitter decides increasing or decreasing the transmit power according to the received TPC command.However

the changing quantity is chosen according to the current TPC command and the historical TPC commands.

关键词

Keywords

references

Views

968

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Effective Capacity Analysis for Markov Fluids Model in Incremental Relay System

Optimal Channel Estimation for Pilot-Aided DS-CDMA Systems

Analysis of Rate Matching Algorithm in W-CDMA

Array Processing and Adaptive PIC Technology for Uplink of WCDMA System

Related Author

QIN Jia-yin

ZHANG Guang-chi

WANG Gui-juan

ZHAN Wei-xu

HE Hai-zhen

LIN Ya-ping

XIA Wei

YOU Xiao-hu

Related Institution

Department of Electronics and Communication Engineering,Sun Yat-sen University.

Key Laboratory of Digital Life of Ministry of Education,Sun Yat-sen University.

Computer and Communication College,Hunan University

NCRL,Southeast University

Dept.of Electronic Engineering,Shanghai Jiao Tong University

⁰