东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2006, Vol. 27 ›› Issue (4): 382-385.DOI: -

• 论著 • 上一篇    下一篇

基于SP子空间跟踪的修正的MMSE多用户检测方法

汪晋宽;贾利琴;刘志刚;薛桂芹;   

  1. 东北大学信息科学与工程学院;东北大学信息科学与工程学院;东北大学信息科学与工程学院;东北大学信息科学与工程学院 辽宁沈阳110004;辽宁沈阳110004;辽宁沈阳110004;辽宁沈阳110004
  • 收稿日期:2013-06-23 修回日期:2013-06-23 出版日期:2006-04-15 发布日期:2013-06-23
  • 通讯作者: Wang, J.-K.
  • 作者简介:-
  • 基金资助:
    教育部博士点基金资助项目(20050145019);;

Modified MMSE multiuser detection algorithm based on SP subspace tracking

Wang, Jin-Kuan (1); Jia, Li-Qin (1); Liu, Zhi-Gang (1); Xue, Gui-Qin (1)   

  1. (1) School of Information Science and Engineering, Northeastern University, Shenyang 110004, China
  • Received:2013-06-23 Revised:2013-06-23 Online:2006-04-15 Published:2013-06-23
  • Contact: Wang, J.-K.
  • About author:-
  • Supported by:
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摘要： 分析比较了多种子空间跟踪算法.复杂度高的特征值分解和奇异值分解不利于工程实现,而低复杂度的PASTd应用于多用户检测导致收敛速度慢并且检测性能差.介绍了SP子空间跟踪算法,利用SP算法跟踪信号子空间求得解调向量,设计了修正的MMSE检测器.与SVDMUD和PASTd MUD两种算法相比,仿真结果显示SP MUD算法收敛速度快,输出信噪比和误码率性能接近SVD MUD算法,并保持了较低的计算复杂度,是一种较好的实现方案.

关键词: 子空间跟踪, 多用户检测, MMSE, 多址干扰, CDMA

Abstract: Several algorithms of subspace tracking are analyzed. Eigenvalue decomposition and singular value decomposition with high computation complexity are not adaptable to engineering practice, while the multiuser detection implemented by PASTd with less computation complexity provides low convergence rate and detectability. Introduces the SP algorithm and utilizes it to track the signal subspace so as to obtain a demodulating vector. A modified MMSE detector was thus designed. To compare it with the performance of PASTd MUD and SP MUD, a simulation test was conducted and the results showed that the SP MUD algorithm with less computation complexity has faster convergence rate and provides the output SINR/bit error rate (BER) similar to SVD MUD.

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