【摘 要】
:
Unmanned Aerial Vehicle (UAV) equipped with uniform linear array has been applied to multiple emitters localization. Meanwhile, nested linear array enables to e
【机 构】
:
College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautic
论文部分内容阅读
Unmanned Aerial Vehicle (UAV) equipped with uniform linear array has been applied to multiple emitters localization. Meanwhile, nested linear array enables to enhance localization resolution and achieve under-determined Direction of Arrival (DOA) estimation. In this paper, we propose a new system structure for emitters localization that combines the UAV with nested linear array, which is capable of significantly increasing the positioning accuracy of interested targets. Specifically, a localization scheme is designed to obtain the paired two-dimensional DOA (2D-DOA, i.e. azimuth and elevation angles) estimates of emitters by nested linear array with UAV. Furthermore, we propose an im-proved DOA estimation algorithm for emit-ters localization that utilizes Discrete Fourier Transform (DFT) method to obtain coarse DOA estimates, subsequently, achieve the fine DOA estimates by sparse representation. The proposed algorithm has lower computational complexity because the coarse DOA estimates enable to shrink the range of over-complete dictionary of sparse representation. In addi-tion, compared to traditional uniform linear array, improved 2D-DOA estimation perfor-mance of emitters can be obtained with a nest-ed linear array. Extensive simulation results testify the effectiveness of the proposed meth-od.
其他文献
Modulation recognition has been long investigated in the literature, however, the performance could be severely degraded in multipath fading channels especially
Channel estimation is a well-known challenge for wireless orthogonal frequency division multiplexing (OFDM) communica-tion systems with massive antennas on high
Novel centralized base station architectures integrating computation and communication functionalities have become important for the development of future mo-bi
研究微量Ca添加对AlMg5热变形过程中微观结构稳定性和动态回复行为的影响.研究手段包括扫描电子显微术(SEM)、差示扫描量热法(DSC)、电子背散射衍射(EBSD)分析和透射电子显微
Unmanned surface vehicle(USV) is currently a hot research topic in maritime communication network(MCN), where denoising and semantic segmentation of maritime images taken by USV have been rarely studi
This paper applies the repetition index scheme (RIS) to the channel identifi-cation of cyclic prefixed (CP) multiple-input multiple-output orthogonal frequency
With the rapid development of maritime activities, there has been a growing demand for high data rate and ultra-reliable maritime communications. Tradi-tionally
采用激波管研究弯曲预应变和压力对AA5052-H32板材成形行为的影响.测量变形拱形高度、有效应变和应力分布、硬度和晶粒尺寸演变等各种成形参数.在板材上印制圆形网格,并用Hil
对经水平定向凝固制备的Al-3%Ni-1%Bi合金(质量分数,%)铸态样品进行微磨料磨损试验,研究凝固热学参数(生长速率(VL)和冷却速率(TR))以及显微组织参数(晶胞间距(λ1)和枝晶间距(