TD-HSPA^+下行链路基于双流发送的天线选择算法  

Antenna selection algorithm for dual-stream transmission in TD-HSPA^+ downlinks

作　　者：朱道华[1] 许威[1] 赵春明[1] 丁美玲[2] 

机构地区：[1]东南大学移动通信国家重点实验室,南京210096 [2]中兴通讯股份有限公司上海研发中心,上海201203

出　　处：《东南大学学报（自然科学版）》2012年第4期583-587,共5页Journal of Southeast University：Natural Science Edition

基　　金：国家科技重大专项课题资助项目(2010ZX03001-002);国家自然科学基金资助项目(61101087);高等学校博士学科点专项科研基金资助项目(20110092120011)

摘　　要：针对TD-HSPA+下行8天线发送双流系统,提出了一种序贯天线选择算法.首先,根据系统的数学模型推导出特征波束赋形后双流各自的信噪比公式.然后根据此表达式设计出5种天线选择准则,并且通过引入序贯选择代替遍历算法以降低选择算法的计算复杂度.仿真结果表明:最大化发送端等效信道相关阵第二特征值的优化准则是5种准则中性能最优的;采用序贯选择算法性能仅比遍历算法损失0.1 dB,但前者所需的计算量仅为后者的四分之一.A sequential antenna selection algorithm for dual-stream transmission in TD-HSPA＋（time division-high speed uplink packet access plus） 8-antenna downlinks is proposed.Firstly,according to the system model,the individual SNR（signal to noise ratio） formula of dual-stream after eigen-beamforming is derived.Based on the derived formula,five kinds of antenna selection criteria are designed,and a sequential selection algorithm instead of a greedy method is introduced to select antennas with less complexity.Simulation results show that the performance of maximizing the second largest eigenvalue of equivalent channel correlation matrix is optimal among the five selection criteria.In contrast to the greedy selection algorithm,selecting antennas in sequential way only causes 0.1 dB performance degradation while in latter case the computation burden is only one fourth of that in the former one.

关 键 词：多输入多输出系统 特征波束赋形 序贯天线选择 

分 类 号：TN929.5[电子电信—通信与信息系统]