基于旋转均匀圆阵的单近场源参数估计解模糊算法

发布时间：2018-03-26 01:40

本文选题：近场源　切入点：旋转　出处：《电子学报》2017年03期

【摘要】：基于阵列的信源定位在无线通信、雷达、声纳等领域运用广泛.针对均匀圆阵下单个高频近场源参数估计存在相位模糊的情况,本文提出利用旋转使同一阵元形成虚拟短基线的解模糊算法.首先,为了对旋转前后两组观测数据进行配准,在圆阵中心设置参考阵元并利用其初始相位差对其他阵元数据进行相位补偿;随后,在通过复共轭积计算各阵元旋转前后无模糊相位差的基础上,使用最小二乘法反演出近场源的方位、俯仰和距离;进一步地,利用反演得到的无模糊近场源参数消除旋转前最长基线阵元间接收信号的相位差模糊,得到长基线下的高精度参数;最后,利用仿真实验验证了本文算法在高频单近场源下的解模糊性能.
[Abstract]:Source location based on array is widely used in wireless communication, radar, sonar and so on. In this paper, a deblurring algorithm is proposed to make the same burst element form a virtual short baseline by rotation. Firstly, in order to register two sets of observation data before and after rotation, The reference element is set in the center of the circular array and the phase compensation of other array elements is carried out by using its initial phase difference. Then, on the basis of calculating the no fuzzy phase difference before and after the rotation of each element by complex conjugate product, The azimuth, pitch and distance of the near-field source are inversed by the least square method, and the phase difference ambiguity of the received signals between the longest baseline array elements before rotation is eliminated by using the non-fuzzy near-field parameters obtained by inversion. The high precision parameters under the long baseline are obtained. Finally, the performance of the proposed algorithm is verified by simulation experiments under the high frequency single near-field source.
【作者单位】：国防科学技术大学电子科学与工程学院;
【基金】：国家自然科学基金(No.61401481,No.61271442)
【分类号】：TN820

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