论文标题
在利用整个阵列光圈的部分校准阵列中查找方向查找
Direction Finding in Partly Calibrated Arrays Exploiting the Whole Array Aperture
论文作者
论文摘要
我们考虑使用部分校准阵列（一个分布式子阵列）在子阵列之间存在位置误差的分布式子阵列的问题。关键挑战是在存在位置误差的情况下增强角度分辨率。为了实现这一目标，现有的算法，例如子空间分离和稀疏恢复，必须依靠多个快照，这增加了数据传输的负担和处理延迟的负担。因此，我们旨在仅使用单个快照来增强角度分辨率。为此，我们利用了部分校准阵列的信号的正交性。特别是，我们将信号模型转换为一个特殊的多测量模型，表明该模型中源信号之间存在近似正交性，然后使用盲源分离来利用正交性。仿真和实验结果既验证了我们提出的算法，就可以达到高角度分辨率作为没有位置误差的分布式阵列，与整个阵列光圈成反比。
We consider the problem of direction finding using partly calibrated arrays, a distributed subarray with position errors between subarrays. The key challenge is to enhance angular resolution in the presence of position errors. To achieve this goal, existing algorithms, such as subspace separation and sparse recovery, have to rely on multiple snapshots, which increases the burden of data transmission and the processing delay. Therefore, we aim to enhance angular resolution using only a single snapshot. To this end, we exploit the orthogonality of the signals of partly calibrated arrays. Particularly, we transform the signal model into a special multiple-measurement model, show that there is approximate orthogonality between the source signals in this model, and then use blind source separation to exploit the orthogonality. Simulation and experiment results both verify that our proposed algorithm achieves high angular resolution as distributed arrays without position errors, inversely proportional to the whole array aperture.
