基于空时特征矢量的空时多用户检测

A Space-time Multiuser Detection based on Spatial-temporal Signature Vector

文章提出了一种新的空时多用户检测方法,该方法有效地结合了空间与时间处理。在求充分统计量中,定义了一种维数较高的空时特征矢量,它包含了各接收阵元阵列响应与扩频序列的联合信息。在求出的充分统计量中包含了各接收阵元之间的信息,在抑制干扰过程中采用了更有效的正交空间投影算法。在DS-CDMA异步多径信道下,仿真结果证明,该方法能有效地抑制多址干扰与多径干扰。

This paper presents a new multiuser detection is proposed, and it combined space processing and time processing effectively. A spatial-temporal signature vector is defined when sufficient statistic is computed. It contained all arrays responses and information for spreading sequences. The sufficient statistic that has computed surveyed mutual information among arrays, and orthogonal space project algorithm is used to remove interferences smoothly. In asynchronous multiuser fading channels for DS-CDMA systems, simulation results show that the proposed method can suppress multiple-access interference and multipath interference effectively.