...
首页> 外文期刊>IEEE Wireless Communications >Orthogonal complementary codes for interference-free CDMA technologies
【24h】

Orthogonal complementary codes for interference-free CDMA technologies

机译:用于无干扰CDMA技术的正交互补码

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       

摘要

This article addresses the issues of next-generation CDMA technologies for B3G wireless communications. To engineer a CDMA system whose performance will no longer be interference-limited, many challenging issues should be tackled, such as novel CDMA code sets, efficient spreading and carrier modulation schemes, and signaling format for high-speed burst traffic. This article reviews our ongoing research on next-generation CDMA technologies. In particular, we propose a new CDMA code design methodology, real environment adapted linearization (REAL), which can generate CDMA code sets with inherent immunity against multipath interference and multiple access interference for both uplink and downlink transmissions. It is also shown that interference-free CDMA can only be implemented with the help of orthogonal complementary codes. The article goes further to reveal that cell-wise capacity for such interference-free CDMA is equal to the number of element codes assigned to each user, making OFDM a natural choice to implement interference-free CDMA. Several other issues of OCC-CDMA, such as its system implementation and performance, are also addressed in this article.
机译:本文解决了用于B3G无线通信的下一代CDMA技术的问题。为了设计一种性能不再受到干扰限制的CDMA系统,应解决许多具有挑战性的问题,例如新颖的CDMA代码集,有效的扩展和载波调制方案以及高速突发流量的信令格式。本文回顾了我们正在进行的有关下一代CDMA技术的研究。特别是,我们提出了一种新的CDMA代码设计方法,即真实环境自适应线性化(REAL),它可以生成具有针对上行链路和下行链路传输的多径干扰和多址干扰固有免疫力的CDMA代码集。还表明,只有借助正交互补码才能实现无干扰的CDMA。该文章进一步揭示了这种无干扰CDMA的逐小区容量等于分配给每个用户的元素代码的数量,从而使OFDM成为实现无干扰CDMA的自然选择。本文还讨论了OCC-CDMA的其他一些问题,例如其系统实现和性能。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号