宽带CDMA系统中线性空时多用户接收机结构与性能分析

给出了一种新的线性空时多用户接收机的一般表达形式。对这种表达形式的分析表明，线性空时多用户接收机可以分解为4个级联部分，即匹配滤波、空域合并、多径合并和多用户检测器，并且前3个部分的运算仍是以单用户接收为基础的。仿真结果表明，这种结构分解可以有效降低线性空时多用户接收机的计算复杂度，加快自适应接收机的收敛速度，更利于实际系统应用。

Linear Space-time Multiuser Receiver in Wideband CDMA Systems

A novel model of linear space-time multiuser receiver in wideband multipath CDMA systems is proposed. The model analysis shows that a linear space-time multiuser detector can be decomposed into four cascade parts, which are match filters, space weighted combiner, multiuser combiner and multiuser detector. Furthermore, the former three parts are still carried out on the single user basis. The simulation result shows that such cascade structures can significantly reduce complexity of space-time multiuser detection, and accelerate the convergence of adaptive algorithms.