CAJ | 학술논문

提出了一种基于扩展重构相关矩阵去相干的二维DOA估计算法。针对六角形阵列的结构特点，首先对各个阵元的接收数据求其共轭矩阵来扩展阵列，扩展后的阵列分为3个六角形子阵列，以此为基础，求得各子阵列的自相关矩阵及互相关矩阵来扩展重构相关矩阵，从而实现解相干的目的，最后利用二维MUSIC算法进行DOA估计。该算法在不减少阵列有效孔径的前提下，增加了可估计相干源数目，并且能够得到较好的估计性能。最后，通过计算机仿真证实了该算法的有效性。
제출료일충기우확전중구상관구진거상간적이유DOA고계산법。침대륙각형진렬적결구특점，수선대각개진원적접수수거구기공액구진래확전진렬，확전후적진렬분위3개륙각형자진렬，이차위기출，구득각자진렬적자상관구진급호상관구진래확전중구상관구진，종이실현해상간적목적，최후이용이유MUSIC산법진행DOA고계。해산법재불감소진렬유효공경적전제하，증가료가고계상간원수목，병차능구득도교호적고계성능。최후，통과계산궤방진증실료해산법적유효성。
A method of 2-D DOA estimation of coherent signals is put forward by extending reconstruction of the correla-tion matrix.Considered the structural feature of the hexagonal array,we can extend the array by getting the conjugate ma-trix of the receiving data of each array element,and the extended array can be divided into three hexagonal subarrays.On this basis,for implementing the estimation of coherent signals,we seeked autocorrelation and cross-correlation matrix of subarrays to expand and reconstruct the correlation matrice.The two dimensional MUSIC algorithm is used to estimate the direction of arrival of coherent signals.Under the condition of no reduction of the array aperture,the proposed algorithm can estimate more number of coherent signals and achieve better estimation performance.The computer simulations demon-strated the effectiveness of the algorithm.