北京邮电大学学报

  • EI核心期刊

北京邮电大学学报

• 学术论文 • 上一篇    下一篇

联合检测 CDMA系统中的功率控制 

    

  1. 北京邮电大学 电信工程学院 , 北京 100876

Power Control in Joint Detection CDMA System 

    

  1. Telecommunication Engineering School, Beijing University of Posts and Telecommunications, Beijing 100876, China
  • Supported by:
     

摘要: 码分多址系统是干扰受限的通信系统 ,存在多址接入干扰、码间干扰和远近效应 . 引入多用户联合检测器可以对抗上述干扰. 将基于 SNR的功率控制引入多用户检测器可以提高系统的性能 ,提出的盲自适应的闭环功率控制进一步改善了系统的误帧率性能和功率控制的错误率 . 

关键词: 码分多址, 联合检测 , 功率控制 

Abstract: The capacity of code division multiple access ( CDMA) systems is limited by inter-symbol interference, multiple-access interference and nearfar effect as well. Joint detection ( JD) technology is introduced into CDM A systems to combat them. However, the interference and the nearfar effect cannot be eliminated completely with low complexity suboptimum joint detection technologies; therefore, we investigate the combination of JD and closed loop power control ( CLPC) algorithms. A blind adaptive CLPC algorithm is provided furthermore, to reduce block error rate of CDM A systems and the standard deviation of power control error.

Key words: code division multiple access, joint detection, power control

中图分类号: