• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>IEE Proceedings. Part I, Communications >Semi-blind space-time receiver for multiuser detection of DS/CDMA signals in multipath channels
【24h】

Semi-blind space-time receiver for multiuser detection of DS/CDMA signals in multipath channels

机译：半盲时空接收机，用于多径信道中的DS / CDMA信号的多用户检测

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

We consider the design of a new space-time receiver that is useful in heavily loaded DS/CDMA systems when only small data records are used in detection. This property is desirable for detection of users of high mobility in crowded systems. The receiver is based on the integration of ESPRIT-based space-time beamforming with multiuser detection based on the constant modulus (CM) property. The beamformer exploits the shift invariance property of the space-time data matrices across the antenna array, and extracts the desired signal along with a small amount of interference. The subsequent multiuser detection stage, which uses the analytical constant modulus algorithm (ACMA), then easily detects the desired signal. In order to avoid association and convergence problems, a small number of zero (off) symbols are added in each block (hence the term semi-blind) so that the ACMA yields a unique solution in a one-shot procedure. Computer simulation results demonstrate that the proposed receiver has a significant performance advantage compared to several other receivers, in the above difficult scenario. Thus the receiver may be a useful candidate for detection in dynamic and crowded systems.
机译：我们考虑设计一种新的时空接收机，当检测中仅使用少量数据记录时，该接收机在重载DS / CDMA系统中很有用。对于拥挤系统中的高移动性用户的检测，此属性是理想的。接收器基于基于ESPRIT的时空波束成形与基于恒定模量（CM）属性的多用户检测的集成。波束形成器利用天线阵列上的时空数据矩阵的位移不变性，并提取所需信号以及少量干扰。随后的多用户检测阶段使用分析恒定模量算法（ACMA），可以轻松检测所需信号。为了避免关联和收敛问题，在每个块中添加了少量的零（关闭）符号（因此称为半盲项），因此ACMA可以通过一次性操作产生唯一的解决方案。计算机仿真结果表明，在上述困难的情况下，与其他几个接收机相比，拟议的接收机具有明显的性能优势。因此，接收器可能是动态和拥挤系统中检测的有用候选者。

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