• 研究论文 • 上一篇    下一篇



  1. (西安电子科技大学 综合业务网理论及关键技术国家重点实验室,陕西 西安 710071)

  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2005-04-20 发布日期:2005-04-20

A subspace tracking algorithm for space-time multi-user detection



  1. (State Key Lab. of Integrated Service Networks, Xidian Univ., Xi'an 710071, China)
  • Received:1900-01-01 Revised:1900-01-01 Online:2005-04-20 Published:2005-04-20

摘要: 在研究子空间方法盲多用户检测算法的基础上,针对增大DS-CDMA系统容量和提高信噪比、误码率性能的问题,提出了一种与阵列天线接收相结合的多用户检测技术——空-时多用户检测技术,可使多用户检测应用于过载系统,增加系统容量.将改进的newOPAST算法应用于盲空-时多用户检测中,结果表明,该算法具有稳定的全局收敛性,并保持了较低的算法复杂度,而其输出信噪比和误码率性能接近算法复杂度高的经典算法.

关键词: CDMA, 多用户检测, 子空间跟踪


From the foundation of the investigation of the multi-user detection algorithm based on the subspace method, we propose a multiuser detection technology combined with array antennas reception—space-time multi-user detection technology to increase the capacity of the DS-CDMA system and improve the performance of the SNR and the bit error rate(BER). This technology makes it possible to apply multi-user detection to the overloaded system and increase the system capacity. The improved newOPAST algorithm is applicable to the blind space-time multi-user detector. Simulation results show that this scheme provides the output SNR and BER similar to those by the classic algorithm with stable global convergence and less computation complexity.

Key words: CDMA, multi-user detection, subspace tracking


  • TN929.5