基于APA和子空间跟踪的盲自适应多用户检测器  

Blind Adaptive Multiuser Detection Based on APA-PASTD

作　　者：谢韬[1] 刘宏立[1] 

机构地区：[1]湖南大学电气与信息工程学院,湖南长沙410082

出　　处：《计算机测量与控制》2009年第8期1605-1607,共3页Computer Measurement &Control

基　　金：国家863项目(2007AA1A121)

摘　　要：盲自适应多用户检测器因其只需很少的信息以及良好的抗多址能力,在CDMA系统中占据着很重要的作用;针对目前盲自适应多用户检测器中算法复杂度高的缺点,提出了一种基于仿射投影和紧缩投影近似子空间跟踪的盲自适应多用户检测器,该算法可以在计算复杂度和检测性能之间取得很好的平衡;仿真结果表明算法在较低的复杂度下能够取得良好的收敛特性和跟踪特性,有着良好的抗多址能力。Because of little information and good anti--multiple access capability, blind adaptive multiuser detection occupies a very important role in the CDMA system. An adaptive algorithm which is based on the affine projection and projection approximation subspace tracking with deflation is presented to overcome the shortcoming of the highly complex, the algorithm can balance the contradiction between the testing performance and computational burden. The simulation results show that the algorithm can be achieved under the good properties of convergence and tracking features in the lower complexity, which has a good anti--multiple access capability.

关 键 词：CDMA 盲自适应多用户检测器 APA 紧缩投影近似子空间跟踪 

分 类 号：TN973.3[电子电信—信号与信息处理]