【摘 要】
：
针对多速率码分多址系统多址干扰导致系统性能降低和使用低率检测算法使系统可用物理用户数下降的问题,提出了接收端使用天线阵列的同步上行双速率多载波码分多址系统的低速
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针对多速率码分多址系统多址干扰导致系统性能降低和使用低率检测算法使系统可用物理用户数下降的问题,提出了接收端使用天线阵列的同步上行双速率多载波码分多址系统的低速率盲空时多用户检测方法.该方法在将不同速率物理用户等效到低速率虚拟用户后,构筑了虚拟用户的空时特征向量,通过子空间投影特性得到各个虚拟用户空时特征向量的盲估计值,进而利用该估计值实现了无需进行模糊复系数估计的软判决多速率盲多用户检测.由于引入空间信息,该方法能够有效抑制多址干扰,提高系统容量.数值仿真结果表明,该方法与已知信道的最小均方误差方法性能
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