The overarching goal of this project was to instrument the new MnDOT Navistar truck used at MN Road. A rugged data acquisition, data recording and wireless transmission system was established for collection of various sensor signals from the truck. The truck was instrumented with a suite of 20 accelerometers, with these accelerometers being located both on the five axles of the truck and on the tractor and trailer bodies. In addition, the truck was instrumented with a differential GPS system and an inertial measurement unit in the tractor cab. A cRIO-based data acquisition system, a rugged laptop and Labview software together serve as a flexible platform for data acquisition. A wireless communication system has been established to communicate trigger signals to roadside cabinets when the truck is at desired GPS locations on the road. Data recording by in-pavement sensors is triggered by this system. Software has also been set up for automatic downloading of data from the truck to a server on the network at MN Road. The experimental performance of the developed system has been verified by multiple tests conducted by the research team. The above instrumentation of the truck will enable data collection on truck vibrations, enable analysis of correlations between truck vibrations and variations in signals of weigh-in-motion sensors, and enable recording of truck movements and pavement loads at MnROAD.

关键词：无线通信；称重；运动传感器；数据采集

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This paper presents the results of an investigation of a proposed concept for closely spaced parallel runways called the Simplified Aircraft-based Paired Approach (SAPA). This procedure depends upon a new alerting algorithm called the Adjacent Landing Alerting System (ALAS). This study used both low fidelity and high fidelity simulations to validate the SAPA procedure and test the performance of the new alerting algorithm. The low fidelity simulation enabled a determination of minimum approach distance for the worst case over millions of scenarios. The high fidelity simulation enabled an accurate determination of timings and minimum approach distance in the presence of realistic trajectories, communication latencies, and total system error for 108 test cases. The SAPA procedure and the ALAS alerting algorithm were applied to the 750-ft parallel spacing (e.g., SFO 28L/28R) approach problem. With the SAPA procedure as defined in this paper, this study concludes that a 750-ft application does not appear to be feasible, but preliminary results for 1000-ft parallel runways look promising.

关键词：算法;着陆辅助设备;预警系统;通信

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The Aeronautical Mobile Airport Communications System (AeroMACS), which is based upon the IEEE 802.16e mobile wireless standard, is expected to be implemented in the 5091 to 5150 MHz frequency band. As this band is also occupied by Mobile Satellite Service feeder uplinks, AeroMACS must be designed to avoid interference with this incumbent service. The aspects of AeroMACS operation that present potential interference are under analysis in order to enable the definition of standards that assure that such interference will be avoided. In this study, the cumulative interference power distribution at low Earth orbit from transmitters at global airports was simulated with the Visualyse Professional software. The dependence of the interference power on antenna distribution, gain patterns, duty cycle, and antenna tilt was simulated. As a function of these parameters, the simulation results are presented in terms of the limitations on transmitter power from global airports required to maintain the cumulative interference power under the established threshold.

关键词：电脑程序；机场；地面站；通信；移动通信系统

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The National Interoperability Field Operations Guide (NIFOG) is a technical reference for emergency communications planning and for radio technicians responsible for radios that will be used in disaster response. The NIFOG includes rules and regulations for use of nationwide and other interoperability channels, tables of frequencies and standard channel names, and other reference material, formatted as a pocket-sized guide for radio technicians to carry with them. If you are not familiar with interoperability and mutual aid communications, start with the How to Use the National Interoperability Field Operations Guide section.

关键词：通信和广播系统；紧急情况；应急计划；互操作性

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This article explains how Task Force Commando; 10th Mountain Division utilized both human factors and emerging technology to better utilize Unmanned Aircraft Systems throughout the Paktika Province on the 2013 deployment to Afghanistan s RC- East. Early in their deployment it was apparent to LTC Jason Bridges, Task Force Gladiator commander that communication between Route Clearance Platoons and UAS operators was insufficient. Despite having FM retrains capabilities on the aircraft which allows for extended FM communications, UAS operators and ground patrol leaders often could not communicate via FM due to atmospheric and mountainous terrain conditions.

关键词：通信网络;阿富汗；无人机；工作队；蒲福风级（蓝色因素跟踪器）

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No abstract available.

关键词：云物理；大气化学；气象雷达；地面站；通信网络

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This thesis explores a novel network design concept to address the data and communications needs of the Department of Defense (DoD). Current and future military operations are increasingly reliant upon data connectivity to facilitate situational awareness and distribute vital information. Current infrastructures are insufficient to meet the growing demand, especially in the myriad austere environments where military forces operate. The DoD has become reliant upon increasingly vulnerable and expensive satellite communications to fill those gaps. The wireless data technologies utilized in the commercial sector to meet the data distribution requirements of business and commercial telecommunications providers can be leveraged and adapted to meet the connectivity requirements of the DoD. By pairing these technologies with developing HAPs and their capabilities the potential for a long-range wireless broadband solution emerges. This thesis evaluates broadband wireless data technologies in combination with High Altitude Platform (HAP) technologies. It proposes a network design concept to serve as a model for future research and the ultimate integration of HAPs into battlefield information architectures bringing the concepts of network centric warfare ever closer to reality.

关键词：无线计算机网络；宽带；通信和无线电系统；数据处理

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In Cognitive Radio Network (CRN),where Primary User (PU) and multiple Secondary Users (SUs) wish to communicate with their corresponding receivers simultaneously over fading channels,spectrum utilization and efficient resource allocation are both significant points for CRN.Interference between PU and SUs should be eliminated in order to realize spectrum sharing.Multi-user resource allocation with the target of maximizing the spectral efficiency of SUs and satisfying the proportional rate constraint between SUs are proposed under the conditions of total SU interference constraint.An adaptive low-complexity suboptimal algorithm for subcarrier and power joint allocation is presented based on Rate Adaptive (RA) criterion,where adaptive subcarrier allocation is performed by assuming equal power distribution,while each subcarrier is assigned in accordance with subcarrier efficiency function.Moreover,linear water-filling algorithm for power allocation is applied within each subcarrier.Simulation results indicate that,with the proposed adaptive subcarrier allocation,spectral efficiency of multiple SUs is superior to traditional subcarrier power joint allocation algorithm.Low computational complexity and adaptive features make it available for implementation.

关键词：认知无线电网络;自适应子载波分配;衰落信道

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network—at an estimated cost of about $3 billion per year indefinitely—to improve communication and other capabilities and to provide needed information to soldiers and commanders on the battlefield. The Army has identified this network as its number one modernization priority. For nearly 20 years, the Army has had limited success in developing its information network of sensors, software, and radios to give soldiers and commanders exact information when they need it, in any environment, and thus improve situational awareness and decision making in combat. To achieve this goal, the Army is implementing a new agile process

关键词：通信网络；军队人员；信息系统；测试

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Cloud computing is fast becoming an integral part of how we communicate with one another, buy music, share photos, conduct business, pay our bills, shop, and bank. Many of the activities that once occurred solely in the physical world, including communications with one another, are increasingly moving to the digital world. What was once a letter to a friend is now a Facebook message; a call to a loved one is now a Skype chat; a private meeting with a business partner is now a video conference call. In short, the cloud is revolutionizing not only how we compute, but also how we live. Where individuals once locked personal or business papers solely in a desk drawer or filing cabinet, they now also store them on someone elses computer. In short, cloud computing is a web-based service that allows users to access anything from e-mail to social media on a third-party computer.

关键词：云计算；隐私保护；社会通信；互联网；计算机辅助教学

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