Improving Obstacles’ Low Observability Using Multistatic RCS: Case of OHW Detection in OCAS for Flying Vehicles

IF 5.8 1区计算机科学 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Antennas and Propagation Pub Date : 2025-03-18 DOI:10.1109/TAP.2025.3548129

Vincent-De-Paul Onana;George Nehmetallah

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引用次数: 0

Abstract

Improving obstacles’ low observability is critical in radar system performance. This study concluded that, when applied to overhead wire (OHW) detection in obstacle collision avoidance system (OCAS) for flying vehicles (FVs), multistatic radar cross section (RCS) from a multi-input multi-output (MIMO) radar system seems to be a way to achieve that goal. Monostatic and multistatic RCSs are derived, highlighting the advantages of multistatic RCS. A complex envelope of signals received at individual antenna active elements as a function of aspect angle is determined from a multistatic RCS scenario. The stretch processing for complex range profiles from signals received by a radar after illuminating a target is examined. The 2-D range aspect angle intensity (RAAI) maps based on stretch processing using monostatic and multistatic RCS of perfect electric conductor (PEC) OHW and circular cylinder (CC) cable obstacles are generated. Multistatic RCS improvements relative to the normal incidence are in the order of 1.5, 6, and 7 dB for the PEC CC cable physical optics (P.O.) theoretical model, the Feko PEC twisted wire, and the Feko PEC CC cable, respectively. Multistatic RCS exhibits superior signal-to-noise ratio (SNR) detection differential over all aspect angles, in the order greater than 18 dB for simulation cases, and in the order of 15 dB for experimental cases analyzed in this study; hence, the multistatic RCS is more suitable for low observable obstacles’ detection, e.g., the detection of OHW obstacles for FVs’ OCAS. Detection behavior from both our experimental measurement collections using a TIDEP-01012 radar and simulation results agree.

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利用多静态RCS改进障碍物低可观测性：飞行器OCAS中OHW检测实例

提高障碍物的低可观测性是雷达系统性能的关键。本研究得出结论，当应用于飞行器避障系统（OCAS）的架空导线（OHW）检测时，多输入多输出（MIMO）雷达系统的多基地雷达横截面（RCS）似乎是实现这一目标的一种方法。推导了单静态RCS和多静态RCS，突出了多静态RCS的优点。从多静态RCS场景中确定单个天线有源单元接收到的信号的复杂包络作为向角的函数。研究了雷达照射目标后接收到的信号对复杂距离像的拉伸处理。利用完美电导体（PEC） OHW和圆柱（CC）电缆障碍物的单静态和多静态RCS进行拉伸处理，生成了基于拉伸处理的二维范围纵横角强度（RAAI）图。对于PEC CC电缆物理光学（P.O.）理论模型、Feko PEC扭曲线和Feko PEC CC电缆，相对于正常入射的多静态RCS改进分别为1.5、6和7 dB。多静态RCS在所有角度上都表现出优越的信噪比（SNR）检测差，在模拟情况下大于18 dB，在本研究分析的实验情况下约为15 dB；因此，多静态RCS更适合于低可观测性障碍物的检测，例如fv的OCAS对OHW障碍物的检测。我们使用TIDEP-01012雷达的实验测量集合的检测行为和模拟结果一致。

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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来源期刊

IEEE Transactions on Antennas and Propagation 工程技术-电信学

CiteScore

10.40

自引率

28.10%

发文量

968

审稿时长

4.7 months

期刊介绍： IEEE Transactions on Antennas and Propagation includes theoretical and experimental advances in antennas, including design and development, and in the propagation of electromagnetic waves, including scattering, diffraction, and interaction with continuous media; and applications pertaining to antennas and propagation, such as remote sensing, applied optics, and millimeter and submillimeter wave techniques