...
首页> 外文期刊>Wireless personal communications >On Multirate DS-CDMA Schemes with Interference Cancellation
【24h】

On Multirate DS-CDMA Schemes with Interference Cancellation

机译:具有干扰消除的多速率DS-CDMA方案

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 paper investigates interference cancellation (IC) in direct-sequence code-division multiple access (DS-CDMA) systems that support multiple data rates. Two methods for implementing multiple data rates are considered. One is the use of mixed modulation and the other is the use of multicodes. We introduce and analyze a new approach that combines these multiple data rate systems with IC. The cancellation in the receiver is performed successively on each user, starting with the user received with the highest power. This procedure can in turn be iterated, forming a multistage scheme, with the number of iterations set as a design parameter. Our analysis employs a Gaussian approximation for the distribution of the interference, and it includes both the AWGN and the flat Rayleigh fading channel. The systems are also evaluated via computer simulations. Our analysis and simulations indicate that the IC schemes used in mixed modulation or multicode systems yield a performance close to the single BPSK user bound and, consequently, give a prospect of a considerable improvement in performance compared to systems employing matched filter detectors.
机译:本文研究了支持多种数据速率的直接序列码分多址(DS-CDMA)系统中的干扰消除(IC)。考虑了用于实现多个数据速率的两种方法。一种是使用混合调制,另一种是使用多码。我们介绍并分析了一种将这些多数据速率系统与IC相结合的新方法。从接收功率最高的用户开始,依次对每个用户执行接收器中的取消操作。依次重复此过程,形成一个多阶段方案,将迭代次数设置为设计参数。我们的分析对干扰的分布采用高斯近似,包括AWGN和平坦瑞利衰落信道。还通过计算机仿真对系统进行评估。我们的分析和仿真表明,在混合调制或多码系统中使用的IC方案产生的性能接近单个BPSK用户界限,因此与采用匹配滤波器检测器的系统相比,性能有望得到显着改善。

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