修正F型阵列的二维DOA估计  

2D DOA Estimation for Modified F-shaped Arrays

作　　者：刘佳奇 屈德新 张更新 LIU Jiaqi;QU Dexin;ZHANG Gengxin(School of Communications and Information Engineering,Nanjing University of Posts and Telecommunications,Nanjing 210003,China)

机构地区：[1]南京邮电大学通信与信息工程学院,江苏南京210003

出　　处：《无线电工程》2025年第3期520-525,共6页Radio Engineering

摘　　要：针对L型阵列在二维波达方向(Direction-of-Arrival,DOA)估计参数,估计过程后期随着信噪比(Signal to Noise Ratio,SNR)的提高测向误差几乎没有变化,维持在0.15°左右,提出了修正F型阵列构型。该阵列在不额外增加阵元数的情况下,充分利用阵元所包含的信号信息使用2次传播算子(Propagation Method,PM)算法对俯仰角和方位角进行2次估计。仿真试验结果表明,修正F型阵列能够实现信号的DOA估计,在高SNR情况下侧向误差减小到0.07°左右,相比均匀L型阵列,该阵列在高SNR情况下估计精度提升了53.3%,在小快拍数情况下成功率也提高了20%,具有稳定、精确的估计精度。For L-shaped arrays,with the improvement of the Signal to Noise Ratio(SNR)in the later stage of the two-dimensional Direction-of-Arrival(DOA)estimation parameter estimation process,the direction finding error hardly changes and remains at about 0.15°.A modified F-shaped array configuration is proposed,which makes full use of the signal information contained in the array elements without increasing the number of array elements,and uses twice Propagation Method(PM)algorithm to estimate the pitch angle and azimuth angle twice.The simulation results show that the array can realize the DOA estimation of the signal,and the lateral error is reduced to about 0.07°in the case of high SNR,compared with the uniform L-shaped array,the estimation accuracy of the array is increased by 53.3%in the case of high SNR,and the success rate is also increased by 20%in the case of a small number of snapshots,which has a more stable and accurate estimation accuracy.

关 键 词：阵列信号处理 波达方向估计 传播算子算法 阵列优化 

分 类 号：TN911.7[电子电信—通信与信息系统]