【作者】 熊泉； 张玉峰； 谭萍； 马洪； 漆兰芬；

【Author】 XIONG quan,ZHANG yufeng,TAN ping,MA hong,QI lanfen (School of Electronic Information,HUST of China,Wuhan 430074)

【机构】 华中科技大学电子与信息工程系；

【摘要】 本文对多种阵列流形情况下波达方向(DOA)估计的性能进行了比较。本文首先利用微分几何的原理从理论上分析了阵列流形的特性对DOA估计性能的影响,通过理论分析与仿真得到了相应的CRB曲线,结果表明,半径相同时,圆阵估计精度最高,方阵其次,十字阵最差。最后研究了圆阵情况下,信噪比、快拍数、阵元数、半径等参数对二维DOA估计性能的影响,通过对阵列流形的数学理论研究与计算机仿真结果对比,得出了实用的结论,为不同应用场合的阵列流形选取提供了依据。更多还原

【Abstract】 In this paper,the performance comparation of the directions of arrival(DOA) estimation is given based on several array manifolds.First,the characteristics of different array manifolds in DOA estimation system is analyzed using the principles of differential geometry theoretically and CRB curves is obtained through theoretical analysis and simulation.The results show that when the array radius is fixed,the circular arrays gets the highest precision,square arrays second,and cross arrays worst.Finally we study the performance of DOA estimation with circular arrays as the parameters changed such as the signal to noise ratio,snapshots,the number of array element and the radius.Through the comparation of research on array manifold of the Mathematical Theory and the simulation results,we get some available conclusions.更多还原