对称子阵列的近场信号稀疏表示定位方法
发布时间:2018-10-19 09:06
【摘要】:针对近场信号源,本文基于对称子阵列提出了两种稀疏信号表示的目标定位方法。首先利用对称阵元导向矢量的关系分离出时延中的方向角和距离两个参数,将近场目标定位问题转换为一个类远场的方向角估计问题,再通过稀疏信号重构的方法分步得到方向角和距离两个参数的估计。在参数分离的过程中,方法二通过构造共轭部分,所得到的虚拟远场阵列阵元数等效于原始阵列,故所能估计的信源数约为方法一的两倍。和同类方法相比,本文提出的方法具有较低的计算量。仿真表明,本文两种方法具有更高的分辨率。
[Abstract]:In this paper, two sparse signal representation methods for target location based on symmetric subarray are proposed for near-field signal sources. Firstly, two parameters of direction angle and distance in time delay are separated by using the relation of orientation vector of symmetric matrix element, and the problem of near-field target location is transformed into a direction angle estimation problem of a quasi-far-field. Then the estimation of direction angle and distance is obtained step by sparse signal reconstruction. In the process of parameter separation, by constructing conjugate part, the number of virtual far-field array elements is equivalent to that of the original array, so the number of information sources can be estimated about twice that of the first method. Compared with the similar methods, the method presented in this paper has a lower computational complexity. Simulation results show that the two methods have higher resolution.
【作者单位】: 重庆理工大学电气与电子工程学院;中国科学院上海微系统与信息技术研究所无线传感网与通信重点实验室;
【基金】:重庆市科学技术委员会前沿与应用基础研究计划一般项目(cstc2015jcyj A40055) 重庆市教育委员会科学研究项目(KJ1500917,KJ1500934)
【分类号】:TN911.7
本文编号:2280705
[Abstract]:In this paper, two sparse signal representation methods for target location based on symmetric subarray are proposed for near-field signal sources. Firstly, two parameters of direction angle and distance in time delay are separated by using the relation of orientation vector of symmetric matrix element, and the problem of near-field target location is transformed into a direction angle estimation problem of a quasi-far-field. Then the estimation of direction angle and distance is obtained step by sparse signal reconstruction. In the process of parameter separation, by constructing conjugate part, the number of virtual far-field array elements is equivalent to that of the original array, so the number of information sources can be estimated about twice that of the first method. Compared with the similar methods, the method presented in this paper has a lower computational complexity. Simulation results show that the two methods have higher resolution.
【作者单位】: 重庆理工大学电气与电子工程学院;中国科学院上海微系统与信息技术研究所无线传感网与通信重点实验室;
【基金】:重庆市科学技术委员会前沿与应用基础研究计划一般项目(cstc2015jcyj A40055) 重庆市教育委员会科学研究项目(KJ1500917,KJ1500934)
【分类号】:TN911.7
【相似文献】
相关期刊论文 前3条
1 G.S.N.Raju;A.Charkraborty;K.S.Ranga Rao;B.N.Das;;只控制不等间距对称阵列天线的相位产生扇形波束[J];现代雷达;1987年02期
2 罗晓丹;王积社;;两个实对称阵同时正交对角化的MATLAB程序[J];软件;2013年09期
3 ;[J];;年期
相关会议论文 前1条
1 陈文轶;刘文斌;;可控阵的幂敛条件[A];第12届全国模糊系统与模糊数学学术年会论文集[C];2004年
,本文编号:2280705
本文链接:https://www.wllwen.com/kejilunwen/xinxigongchenglunwen/2280705.html