摘要
建立了适用于 CDMA系统的自适应天线阵列的系统模型 ,采用 LMS算法首先对阵列结构参数进行了研究 ,得出了ρ值的最佳范围 .研究了由心脏型方向性阵元组成的圆阵和直线阵 ,发现由该阵元组成的圆阵并不能起到提高阵列增益的目的 ,由该阵元组成的直线阵在一定的区域内具有很高的增益 ,可以将这种阵列天线用于扇形小区 .
The system model of adaptive array employed in CDMA system was established. First, this paper studied the geometrical structure of array and obtained the optimum range of ρ. Second, the circular and linear array composed of directional elements was studied. The results showed that the circular array composed of directional elements has no higher gain than that composed of omnidirectional elements; the linear array composed of directional elements has higher gain than that composed of omnidirectional elements within some angle range and so can be employed in sector cell.
出处
《北京邮电大学学报》
EI
CAS
CSCD
北大核心
2000年第2期91-94,共4页
Journal of Beijing University of Posts and Telecommunications
关键词
移动通信
智能天线
码分多址
adaptive algorithm
directional element
adaptive array
CDMA system
