一种具有多径抑制能力的阵列加权准则设计——约束下上比的最小方差(DCMV)准则  

A Weighting Criterion Design of Antenna Arrays for Multipath Mitigation——Down-up-Ratio Constrained Minimum Variance(DCMV) Criterion

作　　者：李敏[1] 王飞雪[2] 李峥嵘[2] 曾祥华[2] 

机构地区：[1]北京环球信息应用开发中心,北京100094 [2]国防科技大学电子科学与工程学院卫星导航研发中心,长沙410073

出　　处：《宇航学报》2012年第8期1035-1040,共6页Journal of Astronautics

基　　金：教育部新世纪优秀人才支持计划资助项目(NCET-08-0144)

摘　　要：针对卫星导航系统监测站(参考站)面临的典型多径环境,设计了一种具有多径抑制能力的阵列加权准则———约束下上比的最小方差(DCMV)准则。该准则的优化目标是在约束有用信号方向的下上比不大于某个门限r的条件下,使阵列输出功率最小。理论推导和仿真结果表明,相比卫星导航领域常见的几种天线阵最优加权准则(如功率倒置、波束控制、最大信干噪比准则等),DCMV准则可以定量控制地面反射多径的入射能量,然而其代价是损失了一定的阵列增益。To mitigate multipath in monitoring （reference） stations of satellite navigation systems, a weighting criterion for antenna arrays called Down-up-ratio Constrained Minimum Variance （DCMV） criterion is proposed in this paper. The proposed criterion aims at minimizing the array output power under the constraint of down-up-ratio not greater than some threshold r. Therefore, this criterion is able to mitigate both interference and muhipath. Simulation results show that it outperformed other criteria in satellite navigation systems, such as Power Inversion, Beam Steering, Maximum Signal-to- Interference-plus-Noise Ratio criterion, etc. The DCMV criterion is able to quantitatively control the incoming muhipath energy, however, it losses some array gain as a cost.

关 键 词：卫星导航 天线阵 多径 干扰 下上比 阵列增益 

分 类 号：TN973.3[电子电信—信号与信息处理]