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): 82-85.doi: 10.13190/jbupt.200503.82.018

• 论文 • 上一篇    下一篇

相关信道下基于VBLAST的多码CDMA容量研究

程型清1,刘海涛1,2,徐绍君1,李道本1   

  1. 1. 北京邮电大学 信息工程学院, 北京 100876; 2. 中国民用航空学院 通信工程系, 天津 300300
  • 出版日期:2005-06-28 发布日期:2005-06-28

Capacity Analysis of Multi-Code CDMA with VBLAST Architecture Under Correlated Channels

CHENG Xingqing1,LIU Haitao1,2,XU Shaojun1,LI Daoben1   

  1. 1. School of Information Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China;2. Department of Communications Engineering, Civil Aviation University of China, Tianjin 300300, China
  • Online:2005-06-28 Published:2005-06-28

摘要:

垂直分层空时结构(VBLAST)与多码码分多址(CDMA)结合可显著提高通信系统的传输速率,而基于零相关窗互补码(LS码)的码分多址系统具有良好特性. 将三者结合研究了相关频率选择性信道下基于VBLAST多码CDMA的系统容量,并推导出容量计算公式. 仿真结果表明,基于零相关窗码的VBLAST的多码CDMA系统容量远高于基于正交码的VBLAST的多码CDMA系统容量.

关键词: 相关信道, 垂直分层空时结构, 多码码分多址, 容量

Abstract:

Combining vertical bell laboratories layered space time(VBLAST) and multi code code division multiple access(CDMA) is an effective way to improve data speed, a good communication character can be obtained based on spreading codes with zero correlation window. The capacity formulas are proposed based on the study of the capacity of VBLASTCDMA system under loose synchronization (LS) code and Walsh code respectively under frequency selective and correlative channels. It shows that the capacity of VBLASTCDMA based on LS code is higher than that based on Walsh code.

Key words: correlated channels, vertical bell laboratories layered space time, multi-code code division multiple access, capacity

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