Direction of Arrival Error for Localization Procedure of Sources with Directional Antenna

J. Kelner, C. Ziółkowski, L. Nowosielski
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引用次数: 2

Abstract

Most methods of radio emission source localization are based on an estimation of received signal parameters. Evaluation of signal reception direction is used in a method called a direction of arrival (DOA). The DOA is one of the most commonly used location methods in wireless systems. Its important advantage is independence from knowledge of a time-frequency structure of the received signal. Therefore, this method is used primarily in military radio reconnaissance systems and electronic warfare. In this paper, we evaluate errors in determining the DOA resulting from propagation phenomena occurring in an urbanized environment. A maximum power received from a given direction is the basis for the estimation of the DOA in most radio direction-finders. Thus, the direction of maximum radiation of the localized object is important because it causes a change of the extremum in a power azimuth spectrum (PAS). Simulation studies are the basis for assessing the DOA error for the transmitters with the directional antennas. To model the impact of propagation phenomena, a multi-elliptical model is used. This model considers the majority of propagation phenomena occurring in the urbanized environment. The possibility of considering patterns of the transmitting and receiving antenna is its important advantage. In this case, the Gaussian is used to model the pattern of the directional antennas. The assessment of the DOA error is carried out for non-line-of-sight conditions between the receiver and transmitter, i.e., the radio direction-finder and localized object, respectively. In simulation studies, the influence of the transmitting antenna parameters, i.e., its beamwidth and direction of maximum radiation, on a shape of the received PASs and their extremums is considered.
定向天线源定位过程中的到达方向误差
大多数射电发射源定位方法都是基于对接收信号参数的估计。信号接收方向的评估方法称为到达方向(DOA)。DOA是无线系统中最常用的定位方法之一。它的重要优点是不需要知道接收信号的时频结构。因此,这种方法主要用于军事无线电侦察系统和电子战。在本文中,我们评估了在城市化环境中发生的传播现象导致的DOA确定误差。在大多数无线电测向器中,从给定方向接收到的最大功率是估计方位的基础。因此,局部物体的最大辐射方向很重要,因为它会引起功率方位角谱(PAS)极值的变化。仿真研究是评估定向天线发射机方位误差的基础。为了模拟传播现象的影响,采用了一个多椭圆模型。该模型考虑了大多数发生在城市化环境中的传播现象。考虑发射和接收天线方向图的可能性是它的重要优点。在这种情况下,高斯函数被用来模拟定向天线的方向图。在接收机和发射机之间的非视距条件下,即无线电测向仪和定位目标,分别进行了DOA误差的评估。在仿真研究中,考虑了发射天线参数,即其波束宽度和最大辐射方向对接收到的通度形状及其极值的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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