| The Federal Communications Commission: Current Structure and Its Role in the Changing Telecommunications Landscape |
14-May-2009 |
15 pages |
| Authors:
Patricia M Figliola; LIBRARY OF CONGRESS WASHINGTON DC CONGRESSIONAL RESEARCH SERVICE
|
 | The Federal Communications Commission (FCC) is an independent Federal agency with its five members appointed by the President, subject to confirmation by the Senate. It was established by the Communications Act of 1934 (1934 Act) and is charged with regulating interstate and international communications by radio, television, wire, satellite, and cable. The mission of the FCC is to ensure that the American people have available -- at reasonable cost and ... |
|
| Interfacing Network Simulations and Empirical Data |
May-2009 |
54 pages |
| Authors:
Ian McCulloh; Joshua Lospinoso; Anthony Johnson; MILITARY ACADEMY WEST POINT NY DEPT OF MATHEMATICAL SCIENCES
|
| This project tests Social Network Models for longitudinal data against empirical data using an original statistical test to determine the effectiveness of various models at reproducing networks. The Link Probability Model (LPM) is introduced as a viable model for the reproduction of social networks in dynamic equilibrium. We survey social network simulation packages and find that Construct uses a continually updated LPM as its stochastic engine, further establishing the LPM's ... |
|
| Zero-Knowledge Proof Based Node Authentication |
May-2009 |
49 pages |
| Authors:
Eric Ayeh; Kamesh Namuduri; NORTH TEXAS STATE UNIV DENTON VICE PRESIDENT RESEARCH SVCS
|
| University of North Texas (UNT) is collaborating with the Air Force Research Laboratory (AFRL) in the design and development of ZKP protocol and in investigating its suitability for airborne networks. During this project, we accomplished the following tasks: (1) Implemented a prototype version of graph isomorphism based ZKP protocol. (2) Analyzed the implementation complexity of the ZKP protocol. (3) Investigated the selection of graphs that are suitable for ZKP implementation. ... |
|
| Breaking the Yardstick: The Dangers of Market-based Governance (Defense Horizons, Number 67, May 2009) |
May-2009 |
9 pages |
| Authors:
Don J DeYoung; NATIONAL DEFENSE UNIV WASHINGTON DC CENTER FOR TECHNOLOGY AND NATIONAL SECURITY POLICY
|
| In the middle of the last century, America became a superpower. It happened, in part, because of a well-balanced technological partnership between the Federal Government and commercial sector. After winning a world war against fascism, this public-private alliance went on to cure infectious diseases, create instant global communications, land humans on the Moon, and prevail in a long Cold War against communism. This, and more, was accomplished without bankrupting the ... |
|
| State, Foreign Operations, and Related Programs: FY2009 Appropriations |
03-Apr-2009 |
42 pages |
| Authors:
Kennon H Nakamura; Susan B Epstein; LIBRARY OF CONGRESS WASHINGTON DC CONGRESSIONAL RESEARCH SERVICE
|
| The annual State, Foreign Operations and Related Agencies appropriations bill is the primary legislative vehicle through which Congress reviews the U.S. international affairs budget and influences executive branch foreign policy making in general. Funding for Foreign Operations and State Department/Broadcasting programs has been steadily rising since FY2002, and amounts approved for FY2004 in regular and supplemental bills reached an unprecedented level compared with the previous 40 years, largely due to ... |
|
| Spin Torque Nano Oscillators as Potential Terahertz (THz) Communications Devices |
Apr-2009 |
20 pages |
| Authors:
Alma E Wickenden; Chris Fazi; Ben Huebschman; Roger Kaul; Andrew C Perrella; William H Rippard; Matthew R Pufall; ARMY RESEARCH LAB ADELPHI MD SENSORS AND ELECTRON DEVICES DIRECTORATE
|
| In this report, we describe the complex impedance of spin torque nano oscillator (STNO) devices. We determined that the STNO is a nonreactive, real-resistance device with single-valued resistance in the broadband frequency range of 500 MHz to 10 GHz (the limit of our test conditions), and that STNOs do not require an external circuit or conjugate matching to operate in a transmitter configuration. We report the first demonstration of the ... |
|
| The Modular Clock Algorithm for Blind Rendezvous |
26-Mar-2009 |
103 pages |
| Authors:
Nicholas C Theis; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
|
| A new algorithm, the modular clock algorithm, is developed and analyzed as a solution for the simple rendezvous environment model, coupled with a modified version for environment models with less information. This thesis examines the rendezvous problem as it exists in a Dynamic Spectrum Access cognitive network. Specifically, it addresses the problem of rendezvous in an infrastructureless environment. The thesis includes a taxonomy of commonly used environment models, and analysis ... |
|
| Voice Traffic over Mobile Ad Hoc Networks: A Performance Analysis of the Optimized Link State Routing Protocol |
26-Mar-2009 |
102 pages |
| Authors:
Noreen P Santos; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| This thesis investigates the performance of the Optimized Link State Routing (OLSR) protocol on Voice over Internet Protocol (VoIP) applications in Mobile Ad hoc Networks (MANETs). Representative VoIP traffic is submitted to a MANET and end-to-end delay and packet loss are observed. Node density, number of data streams and mobility are varied creating a full-factorial experimental design with 18 distinct scenarios. The MANET is simulated in OPNET and VoIP traffic ... |
|
| Public Diplomacy - Are We on the Right Path |
24-Mar-2009 |
40 pages |
| Authors:
Freeman; Frank III; ARMY WAR COLL CARLISLE BARRACKS PA
|
| Diplomacy is commonly understood as private communication between governments. Public diplomacy focuses on ways in which a government communicates with and attempts to influence citizens in other societies. Effective public diplomacy starts from the belief that healthy dialogue, rather than a hollow sales pitch, is key to achieving its foreign policy objectives. This project has two goals - to examine the effectiveness of U.S. public diplomacy efforts since the terrorist ... |
|
| MARSnet: Mission-aware Autonomous Radar Sensor Network for Future Combat Systems |
23-Mar-2009 |
169 pages |
| Authors:
Qilian Liang; TEXAS UNIV AT ARLINGTON DEPT OF ELECTRICAL ENGINEERING
|
| During the period of 7/1/2008 - 12/3 I/2008, we performed the following studies on radar sensor network and other related areas: I. Radar Sensor Network Using A New Triphase Coded Waveform: Theory and Application: 2 Sense-Through-Wall Channel Modeling Using UWB Noise Radar; 3. Orthogonal Pulse Compression Codes for MIMO Radar System; 4 Optimized Punctured ZCZ Sequence-pair Set: Design, Analysis and Application to Radar System; 5. A Triphase Coded Waveform: Design, ... |
|
| Enhancing the NS-2 Network Simulator for Near Real-Time Control Feedback and Distributed Simulation |
21-Mar-2009 |
101 pages |
| Authors:
John S Weir; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
| A network simulator coupled with a visualization package enables the human visual system to analyze the results of network modeling as a supplement to analytical data analysis. This research takes the next step in network simulator and visualization suite interaction. A mediator (or run-time infrastructure (RTI) in the literature) provides researchers the potential to interact with a simulation as it executes. Utilizing TCP/IP sockets, the mediator has the capability to ... |
|
| Bit-Error-Rate-Minimizing Channel Shortening Using Post-FEQ Diversity Combining and a Genetic Algorithm |
10-Mar-2009 |
90 pages |
| Authors:
Gokhan Altin; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
| Channel shortening filter design is a widely examined topic in the literature. Most of the channel shortening equalizer proposals depend on perfect channel state information (CSI). However, this information may not be available in all situations. In cases where the channel state information is not needed, blind adaptive equalization techniques are appropriate. In wireline communication systems, the CSE design is based on maximizing the bit rate, but in wireless systems, ... |
|
| IONS: Information-Theory and Optimization of Networked Systems |
02-Mar-2009 |
7 pages |
| Authors:
Sergio Verdu; Mung Chiang; Bob Fry; PRINCETON UNIV NJ DEPT OF ELECTRICAL ENGINEERING
|
| In this project of Information-theory and Optimization of Networked Systems (IONS), we developed the approaches of geometric programming, information-control duality, erasure information, and stochastic network optimization for communication networks. Pathfinder applications to missile defense, telecommunications, and biological networks are studied. Several major awards were received by the team of co-PIs, including Shannon Award, IEEE Hamming Medal, Presidential Early Career Award for Scientists and Engineers, and Technology Review TR35 Young Innovator ... |
|
| Characterizing and Detecting Unrevealed Elements of Network Systems |
Mar-2009 |
158 pages |
| Authors:
James A Leinart; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
| This dissertation addresses the problem of discovering and characterizing unknown elements in network systems. It is not uncommon to have incomplete knowledge of network systems due to either passive circumstances, e.g. limited resources to observe a network, or active circumstances, e.g. intentional acts of concealment, or some combination of active and passive influences. This research suggests statistical and graph theoretic approaches for such situations, including those in which nodes are ... |
|
| Robust Resource Allocation in an Air Operational Model and Robust Tasking of Wireless Airborne Networks |
Mar-2009 |
47 pages |
| Authors:
N E Wu; Xiaohua E Li; Matthew Ruschmann; STATE UNIV OF NEW YORK AT BINGHAMPTON DEPT OF ELECTRICAL ENGINEERING
|
| The focus of our effort is to study issues regarding robust resource allocation in air operations and robust tasking in wireless airborne networks. For the robust resource allocation, model uncertainties are considered in the generation of a state-based control policy at the strategic level in an air operation. A generic model is used to explain the aspects of modeling, control design, and implementation. Uncertainties are introduced into the transition-rates of ... |
|
| Privacy for Mobile Networks via Network Virtualization |
Mar-2009 |
65 pages |
| Authors:
Todd P Glidden; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Today mobile devices have become powerful and ubiquitous. The conveniences afforded by these devices do not come without a cost, however. The use of mobile devices and mobile networks poses a significant risk to privacy. Four privacy requirements for mobile networks are identified: content privacy, identity privacy, location privacy, and authentication. This work focuses on content privacy. Two threats to content privacy are identified: the casual observer and the attacker. ... |
|
| Regulation Scheme for Improved Innovation and Efficiency in Wireless Communications |
Mar-2009 |
123 pages |
| Authors:
John R Kajmowicz; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Current FCC regulation of the electromagnetic spectrum hinders the growth of wireless communication technology and fails to make efficient use of an extremely valuable asset. Current policies have failed to keep pace with advancing technology and require a completely new allocation scheme in order to promote growth in the wireless communications industry. This paper proposes a new allocation scheme for spectrum regulation that promotes competition in the marketplace in order ... |
|
| Testing and Evaluation of Low-Light Sensors to Enhance Intelligence, Surveillance, and Reconnaissance (ISR) and Real-Time Situational Awareness |
Mar-2009 |
125 pages |
| Authors:
Gokhan S Efe; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Video cameras have increased in usefulness specific to military applications over the course of the past four decades providing remotely controlled and viewed high-definition color images both at day and night conditions making them ideal for defense applications including force protection, critical asset monitoring, and perimeter surveillance. This is a result of many advances in technology including production of high-definition sensors, developing new video compression algorithms and IP capabilities, auto ... |
|
| Maximizing Situational Awareness: Improving Situational Awareness with Global Positioning System Data in the Maritime Environment |
Mar-2009 |
79 pages |
| Authors:
J M Ferebee; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| U.S. Coast Guard mission is to daily conduct law enforcement in the dynamic and challenging maritime environment. Rapid advances in technology have the potential to dramatically improve the organization's capacity to conduct this mission. The ability to track and monitor suspect vessels, as well as the law enforcement personnel that board them, is a critical next step in the evolution of Maritime Interdiction. With the development of the Global Positioning ... |
|
| File Transfer with Erasure Coding over Wireless Sensor Networks |
Mar-2009 |
103 pages |
| Authors:
Thomas E Childers; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| In order to provide a step towards the goal of passing TCP/IP traffic across wireless sensor networks, a method for file transfer utilizing forward error correction (FEC) is studied. Previous work in the area of terminal communication across the sensor network is expanded upon to include file transfer in order to provide a more capable channel and a basis for testing the performance obtained through erasure coding. The results of ... |
|
| Inexpensive Solutions for Direction Finding of Bridge-to-Bridge Radio Transmitters Using Phase Difference in Received Signal |
Mar-2009 |
85 pages |
| Authors:
Eric P Boernke; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| This thesis presents two methods for determining the bearing of a source generating a Very High Frequency (VHF) bridge-to-bridge radio transmission. Using principles of interferometry, one can utilize the calculated phase difference between the received signal at multiple antennas to determine the Angle of Arrival of the detected transmission. This translation of phase difference to Angle of Arrival is accomplished using equations based on signal properties and geometry. The theoretical ... |
|
| Subjective Audio Quality over a Secure IEEE 802.11n Draft 2.0 Wireless Local Area Network |
Mar-2009 |
90 pages |
| Authors:
Benjamin W Ramsey; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
| This thesis investigates the quality of audio generated by a G.711 codec and transmission over an IEEE 802.11n draft 2.0 wireless local area network (WLAN). Decline in audio quality due to additional calls or by securing the WLAN with Internet Protocol Security (IPsec) is quantified. Audio quality over an IEEE 802.11n draft 2.0 WLAN is also compared to that of IEEE 802.11b and IEEE 802.11g WLANs under the same conditions. ... |
|
| Mitigating Distributed Denial of Service Attacks with Multi-Protocol Label Switching-Traffic Engineering (MPLS-TE) |
Mar-2009 |
135 pages |
| Authors:
Ioannis Vordos; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| A Denial of Service (DoS) occurs when legitimate users are prevented from using a service over a computer network. A Distributed Denial of Service (DDoS) attack is a more serious form of DoS in which an attacker uses the combined power of many hosts to flood and exhaust the networking or computing resources of a target server. In recent years, DDoS attacks have become a major threat to both civilian ... |
|
| Source Localization in Wireless Sensor Networks with Randomly Distributed Elements under Multipath Propagation Conditions |
Mar-2009 |
111 pages |
| Authors:
Georgios Tsivgoulis; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| This thesis proposes a least-squares error estimator for line-of-sight, direction of arrival-based localization and a hybrid source localization scheme that addresses multipath propagation for non-cooperative sources using random arrays of wireless sensors. Taking advantage of the dominant reflections, the proposed solution finds the location of a signal source by triangulation using the direction of arrival estimations of both the line-of-sight and the reflected components. It uses a space division multiple ... |
|
| Evaluation of an OPNET Model for Unmanned Aerial Vehicle Networks |
Mar-2009 |
105 pages |
| Authors:
Clifton M Durham; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
| Over the last few years, there has been an explosion in the use of Unmanned Aerial Vehicles (UAVs) in military operations, as well as civilian and commercial applications. UAV Mobile Ad Hoc Networks are fast becoming essential to conducting Network-Centric Warfare. As of October 2006, coalition UAVs, exclusive of hand-launched systems, had flown almost 400,000 flight hours in support of Operations Enduring Freedom and Iraqi Freedom. This document outlines our ... |
|
| Adaptive Control Of Woofer-Tweeter Adaptive Optics |
Mar-2009 |
82 pages |
| Authors:
Jimmie J Perez; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
| Adaptive optics applies advanced sensing and control to improve the ability of optical systems to collect images through a turbulent atmosphere. The results of this research effort demonstrate that the combination of two recent approaches improves the performance of adaptive optics in directed energy and laser communication scenarios. The first approach is adaptive control, which offers improved performance over fixed-gain controllers in the presence of rapidly changing turbulence. The second ... |
|
| Telecommunications in Reconstruction and Stabilization: The Critical Link |
Mar-2009 |
32 pages |
| Authors:
Keith L June; Scott Forster; ARMY WAR COLL CARLISLE BARRACKS PA
|
| To prevent future terrorist attacks, such as those which occurred on 9/11, the United States must be prepared to assist failed states in reconstruction and stabilization. Since the end of the cold war, the United States has been involved in numerous reconstruction and stabilization efforts. A critical, though often neglected, component of reconstruction and stabilization is telecommunications or Information and Communications Technology (ICT). ICT has become a basic and essential ... |
|
| The Benefits of a Network Tasking Order in Combat Search and Rescue Missions |
Mar-2009 |
66 pages |
| Authors:
Murat Gocmen; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| Networked communications play a crucial role in United States Armed Forces operations. As the military moves towards more network centric (Net-Centric) operations, it becomes increasingly important to use the network as effectively as possible with respect to the overall mission. This thesis advocates the use of Network Tasking Orders (NTOs), which allow operators to reason about the network based on asset movement, capabilities, and communication requirements. These requirements are likely ... |
|
| Optimized Robust Adaptive Networks in Supervisory Control and Data Acquisition Systems |
Mar-2009 |
78 pages |
| Authors:
Oquendo; Luis A Class; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
| This thesis investigates the application of a Exponential Weighted Moving Average (EWMA) to be used as a memory buffer in conjunction with Special Protection Schemes (SPS) using the Electric Power and Communication Synchronizing Simulator (EPOCHS). It is proposed that using an SPS incorporating EWMA can compensate for the network layer lack of guarantee of packet delivery and provide for the stability and integrity of the power grid under a catastrophic ... |
|
| Exploitation of Intra-Spectral Band Correlation for Rapid Feature Selection, and Target Identification in Hyperspectral Imagery |
Mar-2009 |
190 pages |
| Authors:
Michael K Miller; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
| This research extends the work produced by Capt. Robert Johnson for detecting target pixels within hyperspectral imagery (HSI). The methodology replaces Principle Components Analysis for dimensionality reduction with a clustering algorithm which seeks to associate spectral rather than spatial dimensions. By seeking similar spectral dimensions, the assumption of no a priori knowledge of the relationship between clustered members can be eliminated and clusters are formed by seeking high correlated adjacent ... |
|
| Simulation-Based Analysis and Evaluation of Tactical Multi-Hop Radio Networks |
Mar-2009 |
125 pages |
| Authors:
Howard D Smith; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| For many years, the technologies involved in the newest generations of tactical communication equipment have increased the reliability and security of tactical voice communications from the highest to the lowest levels of combat command. However, the complexities inherent to wireless data networks have prevented the reach of valuable data links from extending efficiently and reliably to the lowest levels of tactical command. This thesis attempts to quantify the performance of ... |
|
| The Evaluation of Rekeying Protocols Within the Hubenko Architecture as Applied to Wireless Sensor Networks |
Mar-2009 |
104 pages |
| Authors:
Cory J Antosh; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
| This thesis investigates the impact of using three different rekeying protocols-pair-wise, hierarchical, and Secure Lock within a wireless sensor network (WSN) under the Hubenko architecture. Using a Matlab computer simulation, the impact of the three rekeying protocols on the number of bits transmitted across the network and the amount of battery power consumed in WSN nodes during rekey operations is investigated. Baseline pair-wise rekeying performance can be improved by using ... |
|
| Centralized Cooperative Control for Route Surveillance With Constant Communication |
Mar-2009 |
126 pages |
| Authors:
Joseph D Rosal; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| The route surveillance (RS) mission is a new application of unmanned aircraft systems (UASs) to meet the reconnaissance and surveillance needs of combatant commanders. This mission intends to field a four-vehicle UAS that can provide surveillance of convoy routes. This research focuses on developing a solution strategy based on the application of optimal control and cooperative control theory. The RS controller uses the UAS team size to divide the route ... |
|
| Implementation of Collaborative RF Localization Using a Software-Defined Radio Network |
Mar-2009 |
100 pages |
| Authors:
Augustine A Honore; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
|
| This thesis investigates the use of collaboration between sensor nodes that were tasked with localizing a radio frequency emitter. Localization is a necessary component for dynamic spectrum access. Using a set of software-defined radios as our sensors and a received signal strength-based maximum likelihood localization algorithm, we successfully localized transmitting nodes based on their received signal strength. Our experiment was conducted outdoors using a flexible topology that could be shaped ... |
|
| Vision-Aided, Cooperative Navigation for Multiple Unmanned Vehicles |
Mar-2009 |
210 pages |
| Authors:
Jason K Bingham; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| The motivation of this research is to exploit three attributes of increased unmanned vehicle use for intelligence, surveillance, and reconnaissance missions. These attributes are increased numbers of unmanned vehicles, on-board vision, and wireless communications. The research begins with the development of a cooperative navigation system based on the measurement of vehicle position relative to shared landmark position estimates. Each vehicle in the network locates landmarks using it's on-board vision system ... |
|
| Using Covert Means to Establish Cybercraft Command and Control |
Mar-2009 |
84 pages |
| Authors:
Bradley D Sevy; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
|
| The Air Force Research Laboratory (AFRL) Information Directorate (RI) is researching a next generation network defense architecture, called Cybercraft, that will provide automated and trusted cyber defense capabilities for AF network assets. In this research, we consider the issues of how to protect or obfuscate command and control aspects of the system. In particular, we present a methodology to hide aspects of Cybercraft platform initialization in context to formation of ... |
|
| Developing an Operational Level Strategic Communication Model for Counterinsurgency |
24-Feb-2009 |
36 pages |
| Authors:
David P Anders; ARMY WAR COLL CARLISLE BARRACKS PA CENTER FOR STRATEGIC LEADERSHIP
|
| Strategic communication should be operationalized in order to establish an offensive, proactive, approach to the employment of this most essential asset in the counterinsurgency fight. The center of gravity for both the insurgent and counterinsurgent at the operational and tactical level is the population. The first step to gaining the initiative from the insurgent is to understand how they are communicating their messages to the people and what the effectiveness ... |
|
| Cooperative Networks |
23-Feb-2009 |
9 pages |
| Authors:
Cimini; Leonard J Jr; DELAWARE UNIV NEWARK DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
|
| Future tactical networks will be complex, with severe constraints on energy and bandwidth, operating in dynamic and unpredictable environments. By exploiting the broadcast nature of the wireless medium and spatially dispersed nodes, some of the advantages of using multiple antennas can be realized through cooperation among nodes in a network. Recent work has demonstrated that cooperation can provide increased range, improved efficiency, and more reliable and longer lasting connectivity. However, ... |
|
| The Army's Wireless Communications Programs |
11-Feb-2009 |
24 pages |
| Authors:
CONGRESSIONAL BUDGET OFFICE (U S CONGRESS) WASHINGTON DC
|
| The Army's plans for operating its forces rely on the ability of those forces to rapidly process and exchange large amounts of information during battle. The availability of new, high-capacity radios purchased by the Army under a number of wireless communications programs is key to the service s achieving that capability. (Capacity refers to the rate at which a radio can transmit and receive data measured in bits per second.) ... |
|
| Performance Optimization of Complex Systems |
Feb-2009 |
10 pages |
| Authors:
Christos G Cassandras; BOSTON UNIV MA
|
| The research results in this report are based on an effort to develop systematic techniques for performance optimization of complex systems with special emphasis on real-time methods. Recognizing the increasing importance of stochastic networks in both the civilian and military domains, explicit algorithms are sought that are scalable, distributed, asynchronous, and computationally compatible with the limited processing capabilities at individual nodes of many such networks. The main outcomes of the ... |
|
| Underlying Technologies for Military Logistics Prediction and Preemption Capability |
Feb-2009 |
430 pages |
| Authors:
Gregory Mitchell; Toomey; David E Scharett; Tom Ferryman; Peter J Grazaitis; Brian G Ruth; Kwok F Tom; Romeo D Rosario; Del; Charles J Jr; ARMY RESEARCH LAB ADELPHI MD
|
| This report captures the results of a comprehensive assessment of technical requirements associated with achieving a logistics predictive and preemptive capability, or LPPC. It represents Phase II in a three-phased approach spanning operationally- and technically-focused assessment. Phase I, conducted from September to December 2006, documented the compelling case for predictive capabilities, tying it to guidance and concept development at the OSD, Joint, and Army levels. Phase II, the subject of ... |
|
| Enhancing Command Communications and Innovation with SAINT:Semantics, Adaptation, and Influence in Networked Teams |
Feb-2009 |
18 pages |
| Authors:
David E Goldberg; Xavier Llora; ILLINOIS UNIV AT URBANA-CHAMPAIGN DEPT OF INDUSTRIAL AND ENTERPRISE SYSTEMS ENGINEERING
|
| The objectives of AFOSR grant no. FA9550-06-1-0370 are as follows: 1. Enhance online reflection and understanding. 2. Visualize and augment the propagation of influence. 3. Promote integrated human-computer creative collaboration. 4. Embed developed systems in larger collaborative systems and data-mining infrastructures. 5. Pilot developed systems in simulated AF environment. Significant progress has been made on each goal. The progress is briefly reviewed in the next section. |
|
| Extending the Conventional Information Theory: Theory and Designs of Layered Partially Decodable Codes |
29-Jan-2009 |
5 pages |
| Authors:
Lizhong Zheng; MASSACHUSETTS INST OF TECH CAMBRIDGE RESEARCH LAB OF ELECTRONICS
|
| This project is aimed at extending the conventional information theory, which is based on the idea of reliably transmitting all data bits through communication channels, by differentiating different types of data and providing different levels of error protections and thus allowing different parts of the data to be decoded at different nodes in the network. The main challenge addressed in this project is to develop new notions of partial information, ... |
|
| World Intellectual Property Organization (WIPO) Treaty on the Protection of Broadcasting Organizations |
27-Jan-2009 |
11 pages |
| Authors:
Margaret M Lee; LIBRARY OF CONGRESS WASHINGTON DC CONGRESSIONAL RESEARCH SERVICE
|
| Existing international agreements relevant to broadcasting protections do not cover advancements in broadcasting technology that were not envisioned when they were concluded. Therefore, in 1998 the Standing Committee on Copyright and Related Rights (SCCR) of the World Intellectual Property Organization (WIPO) decided to negotiate and draft a new treaty that would extend protection to new methods of broadcasting. The SCCR has not yet achieved consensus on a text. In recent ... |
|
| Distributed Optimization in an Energy-Constrained Network Using a Digital Communication Scheme |
22-Jan-2009 |
6 pages |
| Authors:
Zhi-Quan Luo; Alireza Razavi; MINNESOTA UNIV MINNEAPOLIS DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
|
| We consider a distributed optimization problem where n nodes, S_I,I\in{1,...,n}), wish to minimize a common strongly convex function f(x),x=[x_1,...,x_n]T, and suppose that node S_I only has control of variable x_I. The nodes locally update their respective variables and periodically exchange their values over noisy channels. Previous studies of this problem have mainly focused on the convergence issue and the analysis of convergence rate. In this work, we focus on the ... |
|
| Time-Reversal Based Range Extension Technique for Ultra-Wideband (UWB) Sensors and Applications in Tactical Communications and Networking |
16-Jan-2009 |
49 pages |
| Authors:
Peng Zhang; Nan Guo; Zhen Hu; Yu Song; Robert C Qui; TENNESSEE TECHNOLOGICAL UNIV COOKEVILLE
|
| This report summarizes our research and development work in the last quarter of year 2008. We have reached a practical limit in terms of sampling rate and bandwidth. Listed below are major achievements during the quarter: (1) improved waveform generator: FPGA coding with respect to readability, quantization at the transmitter has been increased from ternary to 8-bit, and sampling rate has been increased from 500 Ms/s to 1 Gs/s; (2) ... |
|
| Joint Source-Network Video Coding for Wireless |
08-Jan-2009 |
15 pages |
| Authors:
Shivkumar Kalyanaraman; John W Woods; Yufeng Shan; RENSSELAER POLYTECHNIC INST TROY NY
|
| This final report is divided into two parts. In the first part, we present the generalization of our joint source-network coding scheme FGA-FEC to wireless video communications. We consider the in-net adaptation of video resolution, frame-rate, and quality to match the network link parameters of bandwidth, packet-loss probability, and bit-error rate, as well as the specific requests/needs of the end-users. This algorithm assumes a high-rate network backbone that is relatively ... |
|
| Performance Limits and Design of MIMO for Sensor and Ad Hoc Wireless and Networks |
05-Jan-2009 |
8 pages |
| Authors:
Rick S Blum; LEHIGH UNIV BETHLEHEM PA DEPT OF COMPUTER SCIENCE AND ELECTRICAL ENGINEERING
|
| We have made excellent progress on studying appropriate signal processing and communication strategies for networks of dispersed nodes where each node may be equipped with a sensor. One area of focus has been on developing appropriate signal processing and communication strategies for networks which focus on target detection or hypothesis testing problems. There are many important military and non-military applications of this paradyme. In particular, hypothesis testing, often called signal ... |
|
| The Outcome of ATC Message Length and Complexity on En Route Pilot Readback Performance |
Jan-2009 |
43 pages |
| Authors:
O V Prinzo; A M Hendrix; R Hendrix; FEDERAL AVIATION ADMINISTRATION OKLAHOMA CITY OK CIVIL AEROMEDICAL INST
|
| Field data and laboratory studies conducted in the 1990s reported the rate of pilot readback errors and communication problems increased as controller transmissions became more complex. This resulted in the recommendation that controllers send shorter messages to reduce the memory load imposed on pilots by complex messages. More than 10 yrs have passed since a comprehensive analysis quantified the types and frequency of readback errors and communication problems that occurred ... |
|
| Hierarchical Integrated Communication and Control |
Jan-2009 |
17 pages |
| Authors:
Kristi A Morgansen; Tara Javidi; WASHINGTON UNIV SEATTLE
|
| A fundamental challenge in designing networked control systems is that communication and control are not. in general, decoupled from each other. In order to address this challenge, the methods used in this project fundamentally integrated the tools, capabilities and constraints of both control theory and networking. The proposed solution enabled leveraging of existing seminal works in both fields. It also allowed for a cross-layer rethinking of the wireless networks for ... |
|
Radio Communications
