基于辅助阵元的幅相误差和DOA同时估计算法  

Simultaneous Estimation of Sensor Gain-Phase Error and DOA Based on Auxiliary Array Elements

作　　者：赵海洲[1] 王小哲[1] 孙晨[1] 郭艺夺[1] ZHAO Haizhou;WANG Xiaozhe;SUN Chen;GUO Yiduo(Air and Missile Defense College,Air Force Engineering University,Xi’an 710051,China)

机构地区：[1]空军工程大学防空反导学院,陕西西安710051

出　　处：《现代防御技术》2023年第2期84-90,共7页Modern Defence Technology

基　　金：陕西省自然科学基金(2023-JC-YB-553);国家自然科学基金(61501501,61601502)。

摘　　要：针对阵元幅相误差使波达方向(direction of arrival,DOA)估计精度下降的问题,提出了一种阵元幅相误差和DOA同时估计算法。该算法通过在阵列一侧设置少量已校正阵元,改变了误差矩阵的结构,并根据改变后的矩阵特征构造了变换矩阵,通过构造的变换矩阵和子空间算法,实现了对阵元幅相误差和DOA的同时估计。此外,该算法能够解决信源功率存在较大差异时误差估计不准的问题,实现了高精度的误差和角度的同时估计。计算机仿真结果证明了所提算法的正确性和有效性。A simultaneous estimation algorithm of the sensor gain-phase error and direction of arrival(DOA)is proposed to solve the problem of reduced DOA estimation accuracy due to the sensor gain-phase error.By setting few calibrated array elements on one side of the array,the proposed algorithm changes the structure of the error matrix,according to the characteristics of which it then constructs a transformation matrix.Through the transformation matrix and subspace algorithm,the simultaneous estimation of sensor gain-phase errors and DOA is realized.In addition,the algorithm can solve the problem of inaccurate error estimation when there is a large difference in the source power and achieve a high-precision simultaneous estimation of errors and angles.The experimental simulations demonstrate the correctness and validity of this algorithm.

关 键 词：阵元幅相误差 DOA估计 辅助阵元 误差校正 子空间算法 

分 类 号：TN957.5[电子电信—信号与信息处理] TP391.9[电子电信—信息与通信工程] TJ0[自动化与计算机技术—计算机应用技术]