多发射天线选择的无线信道序统计特性研究-core.ac.uk.PDF

第20 卷 第6期 Vol.20,No. 6 2005 12 CHINESE JOURNAL OF RADIO SCIENCE December,2005 2005 * 1,2 1 庄铭杰 郭东辉 (1., mjzhuang176 163. com, 361005; 2., 361021) 在独立平坦的瑞利衰落信道中, 提出一种确定排序信道衰落因 大小的联 合概率密度函数( PDF)序系数的方法根据输出信噪比最大的天线选择原则, 就信 道状态信息( CSI)正确和差错两种不同情况,分别给出n 个最大排序的信道衰落因 的边缘PDF 理论式最后, 对采用正交空时分组码的多发射天线选择系统进行 数值仿真,结果表明: 多天线选择能极大地提高系统的传输质量, 而且能有效地抵抗 CSI 差错引起的性能下降 多天线选择, 瑞利衰落信道, 正交空时组码, 概率密度函数 TN9295 A Investigation of order statistics characteristic of wireless fading channels of m ltiple transmit antennas selection ZHUANGMingjie1, 2 GUO dongh i1 ( 1. D ep t. of P hy sics , X iamen Un iv er sity , M J Zh uang 176 163. co m, mj z h uang 176 163. com, X iamen F uj ian 361005, Ch ina 2. I nf o rmat ion T ech nology Colleg e , J ime i Univ er sity , X iamen F uj ian 361021, China) Abstract In independent flat Rayleigh fading channels, the paper presented a method that evaluated the order coefficient of thejoint probability density function ( PDF) of the sorted channels gain magnitude (CGM). Based onthe antennas selec tion rule of the maximum output signaltonoise ratio, for the two cases of the cor rect and the erroneous channels state information ( CSI), the paper then calculated the expressions of marginal PDF of n maximal sorted CGMs, respectively, and the