北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2005, Vol. 28 ›› Issue (3): 23-25.doi: 10.13190/jbupt.200503.23.duhf

• 论文 • 上一篇    下一篇

一种优化的VBLAST系统功率控制算法

杜洪峰,赵成林,蒋挺,周正   

  1. 北京邮电大学 电信工程学院, 北京 100876
  • 出版日期:2005-06-28 发布日期:2005-06-28

An Optimal Power Control Algorithm for VBLAST System

DU Hongfeng,ZHAO Chenglin,JIANG Ting,ZHOU Zheng   

  1. School of Telecommunication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China
  • Online:2005-06-28 Published:2005-06-28

摘要:

在对时变多输入多输出(MIMO)VBLAST(垂直贝尔实验室分层空时结构)系统自适应调制研究的基础上,针对目前的功率控制算法发射功率利用率低的情况,提出了一种基于平均功率控制的功率控制算法. 此算法在发射功率不变的情况下,通过对连续时隙发射功率的综合控制达到提高功率利用率的目的. 为了提高系统的性能,对不同的速率量化方案对系统性能的影响进行了分析. 计算机仿真结果表明,该算法使发射功率的利用率提高10%,系统性能改善05?dB左右.

关键词: 多输入多输出, 垂直贝尔实验室分层空时结构, 功率控制, 自适应调制

Abstract:

Based on the investigation of adaptive modulation issue for vertical Bell lab layered space time (VBLAST) system in time varying channels, a novel power control algorithm is proposed, which is called average power control. By controlling the transmitting power of adjacent time slots on a whole, the algorithm can improve the power usage by 10 percent, and enhance the performance of the system at about 05?dB at the same time.

Key words: multiple input multiple out, vertical Bell lab layered space time, power control, adaptive modulation

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