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Addressing the low-altitude airspace integration challenge — USS or UTM core? 解决低空空域一体化挑战——USS还是UTM核心?
Pub Date : 2018-04-10 DOI: 10.1109/ICNSURV.2018.8384848
F. Matus, Brenden Hedblom
Advancements in unmanned aerial systems (UAS) technology are invigorating the aviation industry. Integrating these platforms into low-altitude airspace globally is challenging the conventional, safety-first culture of the aviation community. Ideas ranging from segregated airspace to integrating unmanned systems alongside manned aviation within national airspace systems have emerged. This paper will examine the many challenges and approaches to ensure the world's airspace systems can maintain exceptional levels of safety while accommodating and balancing the wave of aviation advancements that will disrupt low-altitude operations in both controlled and uncontrolled airspace. Globally, air navigation service providers (ANSPs) and civil aviation authorities (CAAs) generally agree that new, commercially viable approaches must be developed to promote the use of unmanned systems while ensuring the safety of the existing airspace structure. Safety has always driven advancements in aviation and must continue to do so in the new era of unmanned platforms. UAS Traffic Management (UTM) for low-altitude airspace reinforces this need and provides a path forward for safe integration of all vehicles. The unique nature of the UAS operating environment puts UTM in the position of balancing the safety-critical responsibilities associated with low-altitude airspace management with the commercial obligations connected to interfacing with UAS operators. One model being examined in the United States today is being driven from an operator perspective, or UAS Service Suppliers (USS). The USS function delivers both mission planning for UAS operators as well as serving as distributed airspace managers through some as-yet-defined peer-to-peer coordination process. This is referred to as the operator driven model. With no single USS being the authoritative system, the current concept relies on USS to USS communication and collaboration to share position information and mission planning elements to reduce the risks of conflicts in the airspace. This approach, if widely accepted beyond the research and development phase, could usher in a major shift in airspace integration and management philosophy. Longer-term, this could be a shift from ANSPs being the responsible authority for low-altitude airspace and allocating it to third-party commercial providers. The concept of an operator centric airspace management model is a major technological and philosophical shift from today's aviation industry approach and deserves close examination and consideration. An alternative approach proposed in this paper introduces the concept of a UTM Core platform to alleviate these challenges by allocating the safety-critical, airspace management functions from the collection of USSs to a centralized function. The UTM Core concept will reduce the need for excessive coordination and provide a centralized source for information exchange among all relevant stakeholders. It will address the challenges
无人机系统(UAS)技术的进步正在振兴航空工业。将这些平台整合到全球低空空域正在挑战航空界传统的安全第一文化。从隔离空域到在国家空域系统中整合无人系统和载人航空等各种想法已经出现。本文将研究许多挑战和方法,以确保世界空域系统能够保持卓越的安全水平,同时适应和平衡航空进步的浪潮,这将破坏在受控和非受控空域的低空操作。在全球范围内,空中导航服务提供商(ansp)和民航当局(CAAs)普遍认为,必须开发新的、商业上可行的方法,以促进无人系统的使用,同时确保现有空域结构的安全。安全一直是推动航空进步的动力,在无人驾驶平台的新时代,必须继续这样做。用于低空空域的UAS交通管理(UTM)加强了这一需求,并为所有车辆的安全集成提供了前进的道路。UAS操作环境的独特性质使UTM处于平衡与低空空域管理相关的安全关键责任与与UAS运营商接口相关的商业义务的位置。目前,美国正在研究的一种模式是从运营商的角度出发的,即无人机服务供应商(USS)。USS功能为无人机操作员提供任务规划,并通过一些尚未定义的点对点协调过程作为分布式空域管理者。这被称为操作员驱动的模型。由于没有单独的USS作为权威系统,目前的概念依赖于USS之间的通信和协作来共享位置信息和任务规划要素,以减少空域冲突的风险。这种方法,如果在研发阶段被广泛接受,可能会带来空域整合和管理理念的重大转变。从长远来看,这可能是ansp作为低空空域负责机构的转变,并将其分配给第三方商业提供商。以操作员为中心的空域管理模式的概念是当今航空业方法的重大技术和哲学转变,值得仔细研究和考虑。本文提出的另一种方法引入了UTM核心平台的概念,通过将安全关键的空域管理功能从USSs集合分配到集中功能来缓解这些挑战。UTM核心概念将减少过度协调的需要,并为所有相关利益攸关方之间的信息交换提供一个集中的来源。它将解决USS内部通信带来的挑战,以及以USS为中心的方法所基于的协作结构。因此,UTM核心将通过提供维护现有空域结构安全所需的空域领域专业知识,促进新的USS进入者的创新。UTM核心代表了新兴产业发展的中间途径。该公司寻求在大规模无人机集成方面取得积极进展,并为目前面临的挑战引入新的解决方案。如果需要,这种方法保留了服务提供竞争的可能性,并应用先进的自动化来实现动态和经济高效的解决方案。UTM核心提出了一条合理的前进道路,应该考虑保持当今航空界所享有和期望的卓越安全水平。
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引用次数: 5
Wide band channel characterization for low altitude unmanned aerial system communication using software defined radios 使用软件定义无线电的低空无人机系统通信的宽带信道特性
Pub Date : 2018-04-10 DOI: 10.1109/ICNSURV.2018.8384840
Nozhan Hosseini, D. Matolak
In the near future, there will be a need for accommodating large populations of fast moving Unmanned Aerial Systems (UAS) operating in uncontrolled, very low level (VLL) (below 500 ft.) airspace. As is well-known, real-time knowledge of the wireless propagation channel is essential for the effective design and optimization of wireless communication systems. In this paper, we propose a software defined radio (SDR) based channel sounder employing a wideband linear frequency modulated continuous wave (FMCW) or chirp waveform technique for low altitude air-to-air (AA) links. This paper discusses both matched filter and heterodyne detector implementations in the receiver, and investigates advantages and disadvantages of both architectures for an SDR implementation in an AA scenario. We also discuss proper windowing techniques in the transmitter to improve sounding resolution. Some proof of concept measurement results using SDRs are presented for a simulated UAS scenario.
在不久的将来,将需要容纳大量在不受控制的极低空(VLL)(低于500英尺)空域运行的快速移动无人机系统(UAS)。众所周知,无线传播信道的实时信息对于无线通信系统的有效设计和优化至关重要。在本文中,我们提出了一种基于软件定义无线电(SDR)的信道测深仪,该测深仪采用宽带线性调频连续波(FMCW)或啁啾波形技术,用于低空空对空(AA)链路。本文讨论了匹配滤波器和外差检测器在接收机中的实现,并研究了在AA场景中实现SDR的两种架构的优缺点。我们还讨论了在发射机中适当的加窗技术以提高探测分辨率。在模拟的UAS场景中,给出了一些使用sdr的概念验证测量结果。
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引用次数: 14
Most suitable airport to land API on the cloud 最适合在云上降落API的机场
Pub Date : 2018-04-01 DOI: 10.1109/ICNSURV.2018.8384879
S. Ayhan, I. Wilson
Finding a most suitable landing site for manned or unmanned aircraft in case of emergency or search & rescue efforts or for providing disaster relief aids has been a question of interest for some time in the aviation community. Obviously the most suitable landing site is an airport, if it is accommodating, available, and reachable. Although most of today's avionics systems provide a list of nearest airports and a map of the region in case of extraordinary landing situations, critical factors to decide which airport to land is left to the pilot's decision. Selecting one of the listed runways may be risky if the current conditions make it unfeasible. Hence, in this paper, we present a novel Decision Support Tool (DST) in the form of an Application Programming Interface (API) that is deployed on the Microsoft Azure cloud. The API continuously builds a big table with a real-time content by invoking a number of services such as airports, runways, flights data, METAR, and aircraft features. Once, the API has been invoked, top-k airports meeting the specified criteria are presented to the client to enable the decision maker to make informed decisions. The API leverages the cloud technology to deliver a secure, scalable, and highly available service. The service can be used for both manned and unmanned aircraft.
在紧急情况或搜救工作或提供救灾援助时,为有人驾驶或无人驾驶飞机寻找最合适的着陆点一直是航空界一段时间以来关心的问题。显然,最合适的降落地点是机场,如果它是可容纳的、可用的和可到达的。虽然今天的大多数航空电子系统都能提供最近机场的列表和区域地图,以防出现特殊的着陆情况,但决定降落在哪个机场的关键因素是留给飞行员决定的。如果目前的条件不允许,选择其中一条列入名单的跑道可能是有风险的。因此,在本文中,我们以应用程序编程接口(API)的形式提出了一种新的决策支持工具(DST),该工具部署在Microsoft Azure云上。API通过调用许多服务(如机场、跑道、航班数据、METAR和飞机功能),不断构建一个包含实时内容的大表。一旦调用了API,就会将满足指定标准的top-k机场呈现给客户端,使决策者能够做出明智的决策。API利用云技术提供安全、可扩展和高可用性的服务。该服务可用于有人驾驶和无人驾驶飞机。
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引用次数: 0
Evaluating air navigation service efficiency of European airports utilizing DEA 运用DEA评价欧洲机场空中航行服务效率
Pub Date : 2018-04-01 DOI: 10.1109/ICNSURV.2018.8384861
Steffen Hoffmann, Andreas Dellnitz, Andreas Kleine, Rainer Kölle
The rising air traffic volume in Europe, and beyond, is demanding. Accordingly, the need for safe but also efficient air traffic management asks for approaches to evaluate service productions by more than just univariate measures. Data Envelopment Analysis (DEA) is a non-parametric method to assess the efficiency of organizations and processes, so-called Decision-Making Units (DMUs). The major advantage of DEA is to reduce multivariate data to a single key performance indicator (KPI). However, this KPI is just one element to analyze the (economic) situation of a DMU, as shown in the contribution at hand. While almost all DEA applications in the field of air transport refer to airports or airlines as complete units, we concentrate on the efficiency measurement of air navigation services (ANS), especially the arrival and departure phases. The set of DMUs comprises 32 major European airports. Due to a considerable amount of data for potential DEA studies of ANS, this contribution discusses the process of data-selection in a first step; the Performance Review Unit of EUROCONTROL provided all data. In a second step, graphical projections of the DEA results are determined by applying the multivariate method of Multidimensional Scaling (MDS). Finally, possible interpretations of underlying latent variables are given. Thus, the proposed approach provides new insights: for air navigation service providers as well as for authorities, i.e. for regulatory purposes. With regard to a liberalized market for air navigation services in Europe, the overall project goal is to develop a powerful tool for ANS regulation.
欧洲及其他地区不断增长的空中交通量要求很高。因此,对安全但也有效的空中交通管理的需求要求通过不仅仅是单变量措施来评估服务产品的方法。数据包络分析(DEA)是一种评估组织和过程效率的非参数方法,即所谓的决策单元(dmu)。DEA的主要优点是将多变量数据简化为单一的关键绩效指标(KPI)。然而,这个KPI只是分析DMU(经济)状况的一个元素,如手边的贡献所示。虽然几乎所有航空运输领域的DEA应用都将机场或航空公司作为完整的单位,但我们专注于空中导航服务(ANS)的效率测量,特别是到达和离开阶段。这套dmu包括32个欧洲主要机场。由于潜在的ANS的DEA研究的数据量相当大,这篇文章在第一步讨论了数据选择的过程;EUROCONTROL的业绩审查股提供了所有数据。在第二步,通过应用多维尺度(MDS)的多变量方法确定DEA结果的图形投影。最后,给出了潜在变量的可能解释。因此,拟议的方法为空中导航服务提供商和当局(即监管目的)提供了新的见解。关于欧洲空中导航服务的自由化市场,项目的总体目标是为空中导航系统的管理制定一个强有力的工具。
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引用次数: 1
Analysis of en-route vertical flight efficiency 航路垂直飞行效率分析
Pub Date : 2018-04-01 DOI: 10.1109/ICNSURV.2018.8384859
Sam Peeters, Guglielmo Guastalla, K. Grant
Traditionally en-route flight efficiency is addressed in terms of horizontal flight efficiency. Only recently, more emphasis is being put on vertical flight efficiency as well, with a strong focus on the climb and descent phases of flight. Thus, en-route vertical flight efficiency remained untouched and since its impact can be significant, the Performance Review Unit of EUROCONTROL started this project. Efficient flight operations are at the heart of the political and operational debate. This includes a capability to assess and measure constraints imposed on airspace users impeding an efficient vertical flight profile. The work reported in this paper presents the development of a vertical flight efficiency metric based on the monitoring of European ATM performance. The method builds on assessing the vertical constraints between airport pairs on the basis of an analysis of the distribution of cruising altitudes of flights operating between similar airport pairs. The methodology is applied to monitor vertical flight efficiency in the en-route phase in Europe with a specific focus on the impact of level capping constraints. Results are available from 2015 and indicate that the highest amount of en-route vertical flight inefficiency happens within the geographical boundaries of the Maastricht and Karlsruhe Upper Area Control Centers.
传统的航线飞行效率是根据水平飞行效率来解决的。直到最近,人们才更加重视垂直飞行的效率,特别关注飞行的爬升和下降阶段。因此,航线垂直飞行效率保持不变,由于其影响可能很大,欧洲管制组织的业绩审查股开始了这个项目。有效的飞行操作是政治和业务辩论的核心。这包括评估和测量对妨碍有效垂直飞行剖面的空域用户施加的限制的能力。本文报告的工作介绍了基于欧洲ATM性能监测的垂直飞行效率度量的发展。该方法建立在分析相似机场对之间飞行的巡航高度分布的基础上,评估机场对之间的垂直约束。该方法用于监测欧洲航路阶段的垂直飞行效率,特别关注水平封顶约束的影响。2015年的研究结果表明,在马斯特里赫特和卡尔斯鲁厄高空区域控制中心的地理边界内,空中垂直飞行效率最高。
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引用次数: 4
Managing aircraft by trajectory: Literature review and lessons learned 管理飞机的轨迹:文献回顾和经验教训
Pub Date : 2018-04-01 DOI: 10.1109/ICNSURV.2018.8384864
K. Leiden, Alicia Borgman Fernandes, S. Atkins
In order to realize the full potential of the Next Generation Air Transportation System (NextGen), improved management along planned trajectories between air navigation service providers (ANSPs) and system users (e.g., pilots and airline dispatchers) is needed. Automation improvements and increased data communications between aircraft and ground automation would make the concept of Management by Trajectory (MBT) possible. Key components of the MBT concept include: • The ability for air traffic controllers and managers to quickly generate, evaluate and implement changes to an aircraft's trajectory. • Imposing constraints on flight operator-preferred trajectories only to the extent necessary to maintain safe and efficient traffic flows. • A method for the exchange of trajectory information between ground automation systems and the aircraft that allows for trajectory synchronization and trajectory negotiation. MBT addresses shortfalls that remain in the Trajectory Based Operations (TBO) solution set, despite years of research into various aspects of transitioning from the current airspace environment to TBO. This paper provides findings and insights from a literature survey of TBO-related concepts and technologies. These insights can be applied to improve the feasibility and ultimate adoption of MBT.
为了实现下一代航空运输系统(NextGen)的全部潜力,需要改进空中导航服务提供商(ansp)和系统用户(例如飞行员和航空调度员)之间的计划轨迹管理。自动化改进和增加飞机和地面自动化之间的数据通信将使弹道管理(MBT)的概念成为可能。MBT概念的关键组成部分包括:•空中交通管制员和管理人员快速生成、评估和实施飞机轨迹变化的能力。•仅在维持安全和有效的交通流量所必需的范围内,对飞行运营商首选的轨迹施加限制。•一种在地面自动化系统和飞机之间交换轨迹信息的方法,允许轨迹同步和轨迹协商。尽管对从当前空域环境过渡到TBO的各个方面进行了多年的研究,但MBT解决了基于弹道作战(TBO)解决方案集中仍然存在的不足。本文提供了对tbo相关概念和技术的文献调查的发现和见解。这些见解可以用于提高MBT的可行性和最终采用。
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引用次数: 0
Assessing vertical flight profiles during climb and descent in the US and Europe 在美国和欧洲进行爬升和下降时的垂直飞行剖面评估
Pub Date : 2018-04-01 DOI: 10.1109/ICNSURV.2018.8384945
Sam Peeters, Hartmut Koelman, R. Koelle, R. Galaviz-Schomisch, Marc Meekma, Stany Dalmet, J. Gulding
Significant fuel and emissions savings can be realized by an efficient air traffic management system. Throughout the recent years, vertical flight efficiency has been identified as an improvement area. Continuous climb and descent operations are important elements of the on-going air navigation system modernization efforts. This paper expands the joint work by FAA and EUROCONTROL with a view to develop a harmonized understanding and methodology to measure and assess operational air traffic management performance. The work is conducted as an empirical study under the umbrella of the biennial regional US/Europe operational comparison report. Next to updating the assessment of the descent phase, the 2018 edition will include and assess the climb phase. The overall comparison is augmented with case studies for specific airports where a balance between operational constraints and improved efficiency needs to be struck. While initial results point at a higher benefit potential for the descent phase, addressing both phases of flight is essential to provide policy makers and air traffic management decision makers with performance results to further prioritize implementation options and changes to the operational concept.
有效的空中交通管理系统可以显著节省燃料和排放。近年来,垂直飞行效率已被确定为一个改进领域。持续爬升和下降操作是正在进行的空中导航系统现代化工作的重要组成部分。本文扩展了FAA和EUROCONTROL的联合工作,以期制定统一的理解和方法来衡量和评估运营空中交通管理绩效。这项工作是在两年期美国/欧洲区域业务比较报告的框架下进行的一项实证研究。除了更新下降阶段的评估,2018年的版本将包括和评估上升阶段。对具体机场的案例研究扩大了总体比较,这些机场需要在运营限制和提高效率之间取得平衡。虽然初步结果表明下降阶段的潜在效益更高,但解决这两个飞行阶段的问题对于为政策制定者和空中交通管理决策者提供性能结果至关重要,从而进一步确定实施方案的优先顺序,并改变运营概念。
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引用次数: 0
Moral autonomy in decision-making support from avionics analytics ontology 航电分析本体在决策支持中的道德自主
Pub Date : 2018-04-01 DOI: 10.1109/ICNSURV.2018.8384902
C. Insaurralde, Erik Blasch
Air Traffic Management (ATM) and Unmanned Aerial System Traffic Management (UTM) are sophisticated, complex, and support a distributed and dynamic airspace for aviators and air traffic controllers (ATCs). A promising decision-making support approach for cutting-edge ATM/UTM systems is the use of Ontologies for NextGen Avionics Systems (ONAS). This paper discusses foundations for moral autonomy in command-guided self-governed aviation systems, and presents an Avionics Analytics Ontology (AAO) endowed with moral rules for decision-making support in avionics analytics. The AAO is a key element of a Decision-Support System (DSS). It is based on a set of semantic statements such as ontological assertions (e.g., “safeguard of human life must be always high-priority”) related to the right and wrong behavior from the DSS itself and detected air vehicles. The moral endowment ultimately enhances information fusion as to Situation Awareness (SAW) and situation assessment (SA). This paper presents a case study to demonstrate the use of moral semantics by means of two ATM/UTM operation scenarios: a commercial airplane emergency landing, and UAVs flying nearby commercial aircraft or airports. Experimental results from above application examples, concluding remarks, and future research directions are also presented.
空中交通管理(ATM)和无人机系统交通管理(UTM)是复杂的,为飞行员和空中交通管制员(atc)支持分布式和动态空域。对于先进的ATM/UTM系统,一种很有前途的决策支持方法是使用NextGen航空电子系统(ONAS)的本体。讨论了命令引导自治航空系统中道德自治的基础,提出了一种具有道德规则的航电分析本体(AAO),用于航电分析决策支持。AAO是决策支持系统(DSS)的关键要素。它基于一组语义陈述,如本体论断言(例如,“人类生命的保障必须始终是高优先级的”),这些陈述与DSS本身和被探测飞行器的正确和错误行为有关。道德禀赋最终增强了态势感知和态势评估的信息融合。本文通过两种ATM/UTM操作场景:商用飞机紧急降落和无人机在商用飞机或机场附近飞行,通过案例研究来演示道德语义的使用。最后给出了上述应用实例的实验结果、结束语和今后的研究方向。
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引用次数: 7
Paired approach flight demonstration: Planning and development activities 配对进场飞行演示:计划和发展活动
Pub Date : 2018-04-01 DOI: 10.1109/ICNSURV.2018.8384873
K. Leiden, S. Priess, P. Harrison, R. Stone, Paul D. Strande, Mark Palmer
Simultaneous arrivals to closely spaced parallel runways (CSPR) are permissible when visual approaches can be conducted, and visual separation from the lead aircraft and its wake can be provided by the trail aircraft flight crew. During instrument meteorological conditions (IMC), CSPR visual approaches cannot be conducted, and instrument approach procedures are used. These procedures reduce the airport capacity because of increased separation to compensate for surveillance uncertainty and larger collision avoidance response times associated with having a controller in the loop. To increase capacity during IMC, the Paired Approach procedure has been developed. The Paired Approach procedure is a part of Interval Management (IM), which leverages automatic dependent surveillance-broadcast (ADS-B) Out for the lead aircraft (referred to as the Target aircraft) and ADS-B In for the trail aircraft (referred to as the IM aircraft). During the Paired Approach procedure, the IM aircraft uses speed commands from the flight-deck IM (FIM) equipment to maintain precise spacing between itself and the Target aircraft. The IM flight crew is given a time-based spacing parameter referred to as the assigned spacing goal, which is the desired spacing behind the Target aircraft. The desired spacing between the IM and Target aircraft in a Paired Approach operation is the spacing that will keep the IM aircraft far enough behind the Target aircraft to avoid the risk of a collision while still being close enough to the Target aircraft to avoid an encounter with its wake. The FAA is conducting a Paired Approach Flight Demonstration at San Francisco International Airport in early 2019. Honeywell is developing the prototype avionics that will be used and Alaska Airlines, United Airlines, and Honeywell are providing aircraft. The FAA is choosing to scope the demonstration based on a limited part of the Paired Approach operational concept due to technology and concept maturity.
当目视进近可以进行时,允许同时到达紧密间隔的平行跑道(CSPR),并且目视上与领先飞机及其尾流的分离可以由尾随飞机飞行机组提供。在仪表气象条件下,不能进行CSPR目视进近,而使用仪表进近程序。这些程序减少了机场的容量,因为增加了隔离,以补偿监视的不确定性和更大的碰撞避免响应时间,因为在环路中有一个控制器。为了增加在国际整合管理期间的能力,已经制定了配对进场程序。配对进近程序是间隔管理(IM)的一部分,它利用自动相关监视广播(ADS-B)对领头飞机(称为目标飞机)和ADS-B对尾机(称为IM飞机)进行Out和In。在配对进近过程中,IM飞机使用来自飞行甲板IM (FIM)设备的速度命令来保持自身与目标飞机之间的精确间距。IM机组人员被给予一个基于时间的间隔参数,称为分配间隔目标,这是目标飞机后面的期望间隔。在配对进近操作中,中导飞机和目标飞机之间的理想间距是使中导飞机在目标飞机后面足够远,以避免碰撞的风险,同时仍然足够接近目标飞机,以避免与其尾流相遇。美国联邦航空局将于2019年初在旧金山国际机场进行配对进场飞行演示。霍尼韦尔正在开发将使用的原型航空电子设备,阿拉斯加航空公司、联合航空公司和霍尼韦尔将提供飞机。由于技术和概念的成熟度,美国联邦航空局选择基于配对进近操作概念的有限部分来确定演示范围。
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引用次数: 4
Initial results on narrowband air-ground propagation channel modeling using opportunistic ADS-B measurement for coverage design 利用机会式ADS-B测量进行覆盖设计的窄带空地传播信道建模的初步结果
Pub Date : 2018-04-01 DOI: 10.1109/ICNSURV.2018.8384895
J. Naganawa, H. Miyazaki, T. Otsuyama, J. Honda
For making deployment of aeronautical surveillance systems successful, an appropriate propagation channel model should be selected in the coverage design. The selection of the channel models is particularly important for Automatic Dependent Surveillance — Broadcast (ADS-B) because it suffers from 1090 MHz co-channel interferences. Meanwhile, many aircraft have already started to transmit ADS-B signals. Therefore, as a new means of air-ground propagation study, ADS-B signals of target-of-opportunity can be measured. The resulting data covers various route, attitude, weather, aircraft models. Then, such large-scale data can be analyzed to verify the existing channel models and to derive empirical models and parameters. In this paper, discussions and a measurement are made to investigate the limitations and measurable propagation characteristics by the proposed approach.
为了使航空监视系统的部署成功,在覆盖设计中需要选择合适的传播信道模型。信道模型的选择对于自动相关监视广播(ADS-B)尤其重要,因为它遭受1090mhz同信道干扰。与此同时,许多飞机已经开始发射ADS-B信号。因此,作为一种新的地空传播研究手段,ADS-B机会目标信号的测量成为可能。得到的数据包括各种路线、姿态、天气和飞机型号。然后,对这些大规模数据进行分析,验证现有的渠道模型,并推导经验模型和参数。本文讨论并测量了该方法的局限性和可测量的传播特性。
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引用次数: 6
期刊
2018 Integrated Communications, Navigation, Surveillance Conference (ICNS)
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