摘要
针对L型阵,提出了一种互耦自校正算法(SAL:self-calibration algorithm for L-shaped array).该算法利用L型阵列特殊的互耦特性,实现了对信源信息(DOA)和阵列互耦系数的解耦合,从而无需任何校正源就可以实现两类参数的估计.与基于循环迭代最小化技术的传统自校正算法相比,该算法先通过搜索谱峰估计信源信息(DOA),再估计互耦系数,从而避免了多维搜索带来的庞大运算量和迭代中的全局收敛性问题.仿真结果表明本文提出的自校正算法具有精度高、计算量小的特点.
A self-calibration algorithm（SAL：self-calibration algorithm for L-shaped array） is presented for L-shaped array in the presence of mutual coupling.The proposed algorithm utilizes special mutual coupling characteristic of L-shaped array to decouple the signal source information（DOA） and coupling coefficients of antenna array so that two kinds of parameter estimations can be realized without any calibration sources.It not only calibrates mutual coupling inside sub-arrays,but also calibrates mutual coupling between sub-arrays.Compared with conventional self-calibration algorithm based on iterative alternating minimization technique,the proposed algorithm transforms joint estimation problem about DOA and mutual coupling coefficients into cascaded estimation problem,which means that we firstly estimate DOA by searching spectrum peak,and then estimate coupling coefficients so as to avoid huge computation because of multi-dimensional search and global convergence problem due to iterative.Simulation results demonstrate that the proposed self-calibration algorithm is characteristic of high accuracy and little computation.
出处
《电子学报》
EI
CAS
CSCD
北大核心
2010年第6期1316-1322,共7页
Acta Electronica Sinica
基金
国家自然科学基金(No.60601016)
关键词
L型阵列
DOA估计
互耦
自校正
L-shaped array
DOA estimation
mutual coupling
self-calibration
