CAJ | 학술논문

传统的宽带聚焦波达方向估计算法需要预估方位信息，不准确的前期预估将使最终估计结果出现较大误差。研究了一种基于无噪相关矩阵的二维宽带聚焦算法，利用各频点的频域无噪相关矩阵构造聚焦矩阵，不需要进行前期预估，避免了前期预估对最终估计结果的影响，且适用于任意结构阵列。该算法计算复杂度低，分辨率高，估计误差小。当基阵布放的深度已知时，可实现目标定位。基于9元体积阵的目标被动定位，对该算法进行了验证。
전통적관대취초파체방향고계산법수요예고방위신식，불준학적전기예고장사최종고계결과출현교대오차。연구료일충기우무조상관구진적이유관대취초산법，이용각빈점적빈역무조상관구진구조취초구진，불수요진행전기예고，피면료전기예고대최종고계결과적영향，차괄용우임의결구진렬。해산법계산복잡도저，분변솔고，고계오차소。당기진포방적심도이지시，가실현목표정위。기우9원체적진적목표피동정위，대해산법진행료험증。
The conventional wideband focusing DOA estimation methods need pre-estimated directions of the targets, and the inaccurate direction pre-estimation results in the final estimated result with a large error. A wideband focusing method based on the noise-free correlation matrix in the frequency domain is studied in this paper. This method does not require pre-estimated directions and is suitable for arbitrary arrays. Two-dimension localization can been achieved when the depth of the array is known. The simulation results of a small volume array with nine elements show the effectiveness of this method.