北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2010, Vol. 33 ›› Issue (6): 68-71.doi: 10.13190/jbupt.201006.68.tianxj

• 论文 • 上一篇    下一篇

正交空间复用系统的相位旋转预编码

田心记,袁超伟,胡紫巍,王秋杰   

  1. 北京邮电大学 信息与通信工程学院, 北京 100876
  • 收稿日期:2009-11-20 修回日期:2010-06-23 出版日期:2010-12-28 发布日期:2011-01-07
  • 通讯作者: 袁超伟 E-mail:yuancw2000@sohu.com;yuancw2000@bupt.edu.cn;yuancw2000@sina.com
  • 基金资助:

    国家自然科学基金项目(2003112255, 60872149)

Phase Rotation Precoding for Orthogonalized Spatial Multiplexing System

  • Received:2009-11-20 Revised:2010-06-23 Online:2010-12-28 Published:2011-01-07

摘要:

为了减少反馈信息,提出了适用于正交空间复用(OSM)系统的相位旋转预编码(PROSM),该预编码可使调制信号的虚部分量旋转适当的角度. 与OSM系统的功率分配预编码(PLOSM)相比,新方案减少了反馈信息,且降低了获得预编码参数的计算量. 仿真结果表明,当可靠性相同时,新方案比PLOSM节约了4bit的反馈信息.

关键词: 正交空间复用, 预编码, 相位旋转

Abstract:

To decrease feedback overhead, a phase rotation precoding for orthogonalized spatial multiplexing (PROSM) system is proposed, in which a proper rotation is set at the imaginary part of modulated signals. Compared with the power allocation precoding of OSM (PLOSM), the feedback information of this scheme is decreased and the complexity of calculating precoding parameter is also reduced. Simulation results show that with the same reliability of PLOSM, the proposed scheme saves four bits feedback overhead.

Key words: orthogonalized spatial multiplexing, precoding, phase rotation