| Adaptive Transceivers for Wireless Spectrum Networks |
21 AUG 2007 |
18 pages |
| Authors:
Michael L. Honig; NORTHWESTERN UNIV EVANSTON IL OFFICE OF RESEARCH SPONSORED PROJECTS
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 | This project has been concerned with joint transmitter-receiver adaptation in a distributed, peer-to-peer wireless network. Parameters that can be adapted at the transmitter include rate, power, and signatures in space-time-frequency. In this report we summarize our work on the following topics: (1) Limited feedback schemes for optimizing spatial signatures for Multi-Input Multi-Output (MIMO) channels, and power and rates for multi-carrier transmission; (2) Optimization of training overhead for MIMO block fading ... |
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| Wavelet Approach to Data Analysis, Manipulation, Compression, and Communication |
07 AUG 2007 |
16 pages |
| Authors:
Charles K. Chui; MISSOURI UNIV-ST LOUIS
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| The main objective of our research program over the past three-year period is three-fold: firstly, mathematical theories and methods, as well as construction of basis functions, for multi-level approximation and analysis, with emphasis on scattered data interpolation and representation, were developed; secondly, based on minimum-energy criteria, new data processing tools, particularly variational algorithms and optimal wavelet thresholding methods, with applications to image restoration, were introduced; and finally, these developments were ... |
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| World-Wide Satellite Systems Program |
23 JUL 2007 |
25 pages |
| Authors:
Richard B. Jolliffe; Jacqueline L. Wicecarver; Sean A. Davis; Joseph S. Dobish; Eric M. Bisignano; David A. Fahey; Charles S. Dekle; Ernest G. Fine; Jillisa H. Milner; INSPECTOR GENERAL DEPT OF DEFENSE ARLINGTON VA
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| Civilian and military personnel involved in developing indefinite-delivery, indefinite-quantity (IDIQ) contracts and personnel who order off of IDIQ contracts should read this report. The report discusses compliance with Federal and DoD acquisition and contracting policy related to IDIQ contracts, participation of small businesses, information assurance requirements, effectiveness of internal controls, and the use of brand names. The World-Wide Satellite Systems (WWSS) program is procured through six IDIQ contracts that have ... |
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| Time-Reversal Based Range Extension Technique for Ultra-Wideband (UWB) Sensors and Applications in Tactical Communications and Networking |
16 JUL 2007 |
64 pages |
| Authors:
Robert C. Qiu; Nan T. Guo; Qiang J. Zhang; Chenming J. Zhou; Zhen E. Hu; Peng P. Zhang; Dalwinder Singh; Corey Cooke; TENNESSEE TECHNOLOGICAL UNIV COOKEVILLE
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| This technical report (quarterly) details the work for Office of Naval Research (ONR) by Tennessee Tech. The goal of this project - jointly funded by ONR, NSF, and ARO - is to build a general purpose testbed with time reversal capability at the transmitter side. The envisioned application is for UWB sensors and tactical communications in RF harsh environments where multipath is rich and can be exploited through the use ... |
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| Communicating on the Move: Mobile Ad-Hoc Networks |
01-Jul-2007 |
3 pages |
| Authors:
Dean Nathans; Robert F Dillingham; OFFICE OF THE ASSISTANT SECRETARY OF DEFENSE FOR NETWORKS AND INFORMATION INTEGRATION WASHINGTON DC
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| Mobile Ad-Hoc Networks (MANETs) are wireless networks that continually re-organize themselves in response to their environment without the benefit of a pre-existing infrastructure. A MANET consists of a set of mobile participants who must communicate, collaborate, and interact to complete an assigned mission. The challenges of MANETs are to provide wireless, high-capacity, secure, and networked connectivity. Participants must communicate using bandwidth limited wireless links with potential intermittent connectivity, as compared ... |
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| Reconfiguring to Meet Demands: Software-Defined Radio |
01-Jul-2007 |
5 pages |
| Authors:
Dean Nathans; Donald R Stephens; OFFICE OF THE ASSISTANT SECRETARY OF DEFENSE FOR NETWORKS AND INFORMATION INTEGRATION WASHINGTON DC
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| A Software-Defined Radio (SDR) allows a single hardware platform to be reconfigurable so that it can accommodate multiple radio waveforms and be easily upgraded with software changes. The Joint Tactical Radio System (JTRS) is the Department of Defense's (DoD) solution for a family of tactical SDRs based on common open standards and architectures. JTRS accommodates legacy and new mobile ad hoc networking waveforms. Additionally, military Satellite Communication and Intelligence, Surveillance, ... |
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| Redundancy Analysis and a Distributed Self-Organization Protocol for Fault-Tolerant Wireless Sensor Networks |
JUL 2007 |
31 pages |
| Authors:
Yi Zou; Krishnendu Chakrabarty; DUKE UNIV DURHAM NC DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
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| Sensor nodes in a distributed sensor network can fail due to a variety of reasons, e.g., harsh environmental conditions, sabotage, battery failure, and component wear-out. Since many wireless sensor networks are intended to operate in an unattended manner after deployment, failing nodes cannot be replaced or repaired during field operation. Therefore, by designing the network to be fault-tolerant, we can ensure that a wireless sensor network can perform its surveillance ... |
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| Transformational Satellite (TSAT) Communications Systems. Falling Short on Delivering Advanced Capabilities and Bandwidth to Ground-Based Users |
JUL 2007 |
36 pages |
| Authors:
Maurice M. McKinney; AIR COMMAND AND STAFF COLL MAXWELL AFB AL
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| The Transformational Communications Office's (TCO) 17 December 2003 report states, "The current SATCOM and data relay systems are unable to meet future bandwidth demands. They lack capacity, in both aggregate data rate and the number of users they can support.... Furthermore, the life expectancies of the existing space segments and much of their associated terminal and management segments do not extend beyond the 2010-2015 time frame." These shortfalls and the ... |
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| Command and Control for Homeland Security |
14-Jun-2007 |
24 pages |
| Authors:
Marjorie Greene; OFFICE OF NAVAL RESEARCH ARLINGTON VA
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| Partial contents: ProMED-mail, The Strategic Vision, The Detection of Emerging Infections Using An Epidemiologic Surveillance System, DHS Secretary established NIMS March 2004, INFORMS MAS Conference on Homeland Security June 2006, NIMS Revision Version 2 March 2007, NWDC Domestic Disaster Relief Operations Planning, 15 May 2006, AFRL-Supported Studies on Large- Scale Coordination, A Sociotechnical Systems Analysis of the Toronto SARS Outbreak, Vertical Integration, Vertical Integration in a Military Command Hierarchy, Information ... |
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| Limited Evaluation of an 802.11b Air-to-Air Wireless Data Link (Project Have HALO II) |
01 JUN 2007 |
53 pages |
| Authors:
Robert A. Volesky; Jason W. Geitgey; Jason C. Vap; Douglas O. Creviston; Morikazu Kikuchi; AIR FORCE FLIGHT TEST CENTER EDWARDS AFB CA
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| This report presents the results of Project Have HALO II a limited evaluation of an 802.11b wireless air-to-air data link between two C-12C aircraft. This test program demonstrated the 802.11b wireless data link reception range under 1 Watt and 5 Watts of amplification, corresponding to 0.32 and 1.58 Watt effective isotropic radiated power. The test team also demonstrated the capability of transmitting still photos, streaming video, pre-recorded video and text ... |
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| Capacity of Multi-Channel Wireless Networks with Random (c,f) Assignment |
01-Jun-2007 |
30 pages |
| Authors:
Vartika Bhandari; Nitin H Vaidya; ILLINOIS UNIV AT URBANA-CHAMPAIGN DEPT OF COMPUTER SCIENCE
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| We argued for the need to study the performance of multi-channel networks in situations where there are constraints on channel switching. We proposed some constraint models in [1] to capture some expected constraints, and analyzed two such models, viz., adjacent (c,f) assignment and random (c,f) assignment. We studied the impact of such restricted switching, quantified by the parameter f (where f is the number of channels an individual node may ... |
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| Radio Interoperability: There Is More to It Than Hardware |
01-Jun-2007 |
28 pages |
| Authors:
Ronald P Timmons; Susan G Hutchins; NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF INFORMATION SCIENCES
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| Radio Interoperability: The Problem *Superfluous radio transmissions contribute to auditory overload of first responders -Obscure development of an accurate operational picture for all involved -Radio spectrum is a limited commodity once it's full, it's full. *Practical limit to number of people who can operate on a common platform before quality of communications deteriorates *Policies and practices need to be reexamined to develop new strategies which will facilitate effective communications. |
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| Simulated Frequency and Force Modulation Atomic Force Microscopy on Soft Samples |
JUN 2007 |
19 pages |
| Authors:
Joshua C. Crone; Santiago Solares; Peter W. Chung; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD COMPUTATIONAL AND INFORMATION SCIENCES DIR
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| This report was generated as part of a Student Temporary Employment Program Internship from July 2006 through June 2007. The report presents basic didactic concepts and reviews recent progress in the scientific literature on atomic force microscopy (AFM). A new AFM technique is studied. The novel AFM approach is based on force and frequency modulation (FFM-AFM) that enables nondestructive AFM measurements of soft samples such as biological materials in solution. ... |
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| Feasibility of a Dynamic Data Rate Satellite Link for Inmarsat |
JUN 2007 |
111 pages |
| Authors:
John F. Boseman; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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| Inmarsat is a predominantly commercial satellite system fitted on most United States Navy surface vessels including: frigates, cruisers, destroyers, amphibious ships and mine sweepers. It is primarily used for telephone, fax, email, web browsing, and the Global Command and Control System (GCCS). Inmarsat, however, has a very limited data rate. For ships fitted with the latest modem upgrade, Inmarsat provides a meager 128 kbps for support of its numerous functions. ... |
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| Investigating Team Collaboration of the Fire Department of New York Using Transcripts from September 11, 2001 |
JUN 2007 |
195 pages |
| Authors:
Maura Garrity; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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| On September 11, 2001, more than one thousand people responded to aid in rescue efforts at the World Trade Center in New York City, mobilizing the largest rescue operation in the city's history. The collaborative teamwork demonstrated in this response is recorded in the radio transcripts between responding units and the Manhattan Dispatcher. The goal of this thesis is to use these transcripts to provide a real world example to ... |
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| Multistage Security Mechanism For Hybrid, Large-Scale Wireless Sensor Networks |
JUN 2007 |
80 pages |
| Authors:
Grigorios Katsis; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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| A wide area network consisting of ballistic missile defense satellites and terrestrial nodes can be viewed as a hybrid, large-scale mobile wireless sensor network. Building on research in the areas of the wireless sensor networks (WSN) and the mobile ad hoc networks (MANET), this thesis proposes an efficient multistage security mechanism for node and data authentication and data confidentiality. Node authentication is provided by digital signatures and the public key ... |
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| Real-Time Speech Recognition System for Robotic Control Applications Using an Ear-Microphone |
JUN 2007 |
159 pages |
| Authors:
Dimitrios S. Koliousis; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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| This study is part of an ongoing research started in 2004 at the Naval Postgraduate School (NPS) investigating the development of a human-machine interface command-and-control package for controlling robotic units in operational environments. An ear microphone is used to collect the voice-activated commands providing hands-free control instructions in noisy environments [Kurcan, 2006; Bulbuller, 2006]. This study presents the hardware implementation of a theoretical Isolated Word Recognition (IWR) system designed in ... |
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| Scalable Video Transmission Over Multi-Rate Multiple Access Channels |
JUN 2007 |
20 pages |
| Authors:
Lisimachos P. Kondi; STATE UNIV OF NEW YORK AT BUFFALO AMHERST RESEARCH FOUNDATION
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| This effort demonstrated the interference mitigation capabilities of the auxiliary vector (AV) receiver for video transmission over direct-sequence code division multiple access (DS-CDMA) systems. The proposed receiver design is compared to the conventional RAKE matched-filter (RAKE-MF) and sample-matrix-inversion minimum-variance-distortionless-response (SMI-MVDR) receivers. The DS-CDMA video data stream is transmitted over an RF channel under realistic Rayleigh-faded multipath channel conditions, emulating open and/or urban battlefield environments. |
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| Voice and Video Capacity of a Secure Wireless System |
JUN 2007 |
114 pages |
| Authors:
Jason R. Seyba; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
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| Improving the security and availability of secure wireless multimedia systems is the purpose of this thesis. Specifically, this thesis answered research questions about the capacity of wireless multimedia systems and how three variables relate to this capacity. The effects of securing the voice signal, real-time traffic originating foreign to a wireless local area network and use of an audio-only signal compared with a combined signal were all studied. The research ... |
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| Performance Analysis and Comparison of Multiple Routing Protocols in a Large-Area, High-Speed Mobile Node Ad Hoc Network |
JUN 2007 |
139 pages |
| Authors:
Daniel K. Roberts; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
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| The U.S. Air Force is interested in developing a standard ad hoc framework using "heavy" aircraft to route data across large regions. The Zone Routing Protocol (ZRP) has the potential to provide seamless large-scale routing for DOD under the Joint Tactical Radio System program. The goal of this study is to determine if there is a difference between routing protocol performance when operating in a large-area MANET with high-speed mobile ... |
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| HF Interference, Procedures and Tools (Interferences HF, procedures et outils) |
JUN 2007 |
|
| Authors:
NATO RESEARCH AND TECHNOLOGY ORGANIZATION NEUILLY-SUR-SEINE (FRANCE)
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 | This Report presents the results of the work carried out by IST-050/RTG-022 the Research Task Group (RTG) on "HF Interference Procedures and Tools" to address the concerns raised by the potential for unintentional radio interference to be caused by the widespread operation of broadband wire-line telecommunications systems, such as PowerLine TeleCommunications (PLT, PLC) and various forms of Digital Subscriber Line (xDSL). Increase of the existing HF noise floor by widespread ... |
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| Enhanced Position Location Reporting System (EPLRS) Positioning Capability |
JUN 2007 |
|
| Authors:
Gary Fielke; DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA) ELECTRONIC WARFARE AND RADAR DIVISION
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| The Enhanced Position Location Reporting System (EPLRS) is a network of wireless tactical radios that distributes digital data between many mobile users. In addition, EPLRS has a position reporting capability allowing mobile users to determine their position based on time difference of arrival measurements from multiple reference radio units. EPLRS has the potential to be used in Unmanned Aerial Vehicles as a navigation system backup to GPS. This report details ... |
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| Distributed Algorithms for Beamforming in Wireless Sensor Networks |
JUN 2007 |
136 pages |
| Authors:
Nikolaos Papalexidis; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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| Sensor nodes in a wireless sensor network (WSN) can establish a link with a UAV by using beam forming techniques to from a random array with position errors. The position errors' effect in the array performance is examined using a MATLAB-based simulation model. In order to spread the processing and communication load among the nodes, two new distributed algorithms for beam forming in WSN, based on the least squares (LS) ... |
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| VoIPNET: A Software Based Communications Tool for Low-Bandwidth Networks |
JUN 2007 |
251 pages |
| Authors:
Jr Reiche Charles P.; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Maneuver element communications can be divided into Single-Channel Voice, Data Networks, and Telephony. Classified computer networks, such as SIPRNET are pushed to Infantry and Artillery Battalions via the EPLRS radio system. However, telephone services may or may not be supported due to limited availability of Multi-Channel Digital assets. Single-Channel Radio is utilized to communicate with higher, adjacent and subordinate organizations. While this is a sufficient means of communications, it is ... |
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| Extending the Range of the 802.11g WLAN through Improved Synchronization Techniques |
JUN 2007 |
151 pages |
| Authors:
Vikram Sardana; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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| Orthogonal Frequency Division Multiplexing (OFDM) allows for a spectrally efficient means of obtaining high data rates while simultaneously combating the effects of fading. The multi-carrier spectrum of OFDM mandates that the receiver accomplish a number of synchronization tasks to successfully demodulate the OFDM signal, including the critical requirement to synchronize the carrier frequency. Additional synchronization tasks include frame synchronization (packet detection), synchronization of the carrier phase, and symbol timing. Improved ... |
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| Partial Band Jamming Against 802.16a |
JUN 2007 |
89 pages |
| Authors:
Daniel P. Zastrow; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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| The IEEE 802.16a standard provides for Broadband Wireless Access (BWA) for the global deployment of broadband Wireless Metropolitan Area Networks (WMANs). Commercially known as Wi-Max, the standard aims to provide large amounts of wireless data over long distances, in a cellular type structure with base stations and subscriber stations. The standard uses Orthogonal Frequency Division Multiplexing (OFDM) which allows the transmission of high data rates in severe channel conditions without ... |
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| Secure Tracking in Sensor Networks |
Jun-2007 |
7 pages |
| Authors:
Chih-Chieh G Chang; Wesley E Snyder; Cliff Wang; NORTH CAROLINA STATE UNIV AT RALEIGH
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| Target tracking is a canonical issue in sensor networks research. However, tracking security has gained little or no attention. Once a sensor node is compromised, it will be able to inject false location information into the network, and those nodes receiving such information will suffer greatly in terms of tracking precision. This paper, to the best of our knowledge, is the first to explore the topic of security in the ... |
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| An Experimental Design Approach for Optimizing SMSE Waveforms to Minimize Coexistent Interference |
Jun-2007 |
6 pages |
| Authors:
T W Beard; M A Temple; M L Roberts; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH
|
| An experimental design approach is used to determine which factors (design parameters) of Spectrally Modulated, Spectrally Encoded (SMSE) waveforms have the greatest impact on coexistence with other communication waveforms. The SMSE framework supports cognition-based, software de- fined radio (SDR) applications and is well-suited for coexistence analysis. For initial proof-of-concept, a two factor (parameter), three-level (value) experimental design technique is applied to a coexistent scenario to characterize SMSE waveform impact on ... |
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| Robust Frequency-Hopping System for Channels with Interference and Frequency-Selective Fading |
Jun-2007 |
8 pages |
| Authors:
Don Torrieri; Matthew C Valenti; Shi Cheng; ARMY RESEARCH LAB ADELPHI MD
|
| A robust frequency-hopping system with noncoherent detection, iterative turbo decoding and demodulation, and channel estimation is presented. The data modulation is the spectrally compact nonorthogonal continuous-phase frequency-shift keying, which strengthens the frequency-hopping system against multiple-access interference and multitone jamming. An analysis based on information theory provides the optimal values of the modulation index when there is a bandwidth constraint. The channel estimator, which is derived by applying the expectation-maximization algorithm, ... |
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| Performance Analysis of SINEMO: Seamless IP-diversity Based Network Mobility |
Jun-2007 |
7 pages |
| Authors:
Pulak K Chowdhury; Abu S Reaz; Mohammed Atiquzzaman; William Ivancic; OKLAHOMA UNIV NORMAN
|
| IETF has proposed Mobile IPv6-based Network Mobility (NEMO) basic support protocol (BSP) to support network mobility. NEMO BSP inherits all the drawbacks of Mobile IPv6, such as inefficient routing path, single point of failure, high handover latency and packet loss, and high packet overhead. To address these drawbacks, we proposed an IP diversity-based network mobility management scheme called Seamless IP-diversity based NEtwork MObility (SINEMO). In this paper, we develop analytical ... |
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| Analysis of Code-Assisted Blind Synchronization for UWB Systems |
Jun-2007 |
7 pages |
| Authors:
Mounir Ghogho; Ananthram Swami; Yeqiu Ying; LEEDS UNIV (UNITED KINGDOM) SCHOOL OF ELECTRONIC AND ELECTRICAL ENGINEERS
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| Timing synchronization is a preeminent challenge in ultra-wideband impulse radios (UWB-IRs). The conventional all-digital synchronization methods encounter some formidable implementation difficulties such as high rate sampling and high complexity RAKE structure. To avoid these challenges, semianalog methods have been motivated recently. We have recently proposed a code-assisted blind synchronization (CABS) algorithm to realize timing synchronization blindly with the help of the discriminative property of both time hopping codes and welldesigned ... |
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| Approximation of Bit Error Rates in Digital Communications |
Jun-2007 |
|
| Authors:
Graham V Weinberg; Sharon Lee; DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA) ELECTRONIC WARFARE AND RADAR DIVISION
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| This report examines the estimation of bit error rates (BERs) in digital communications. Specifically, the authors will investigate recent work on using bounds to construct approximations for differential quaternary phase shift keying (DQPSK) transmission with Gray coding over an additive white Gaussian noise channel (AWGNC). In previous research, an estimate of this BER was constructed by averaging a lower and upper bound. The authors show that more direct methods can ... |
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| Foreign Policy Effects on Strategic Communications and the Ability to Influence |
17 MAY 2007 |
67 pages |
| Authors:
Robert M. Roth; NATIONAL DEFENSE UNIV NORFOLK VA JOINT FORCES STAFF COLL
|
| This paper provides an analytical analysis of how the United States Government conducted strategic communications from post World War II until the end of the Cold War with the former Soviet Union. In the post Cold War environment, the paper continues to analyze how the U.S. Government conducted strategic communications into the 21st Century without an executive agency to lead this very important form of national power. The discussion leads ... |
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| Solving Wireless Communications Interoperability Problems among Emergency First Responders Depends on Greater National Guard Involvement |
17 MAY 2007 |
70 pages |
| Authors:
Blair J. McFarland; NATIONAL DEFENSE UNIV NORFOLK VA JOINT FORCES STAFF COLL
|
| Interoperable first responder wireless communications are a key strategic requirement for effectively and efficiently responding to and recovering from man-made and natural disasters. "Communications -- particularly wireless communications -- are the critical enabler of all other functions in any disaster relief operation." Recent major events provide terrible examples of the unnecessary loss of lives and severe confusion in which lack of interoperability played a significant role. These events resulted in ... |
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| Strategic Communication and the Geographic Combatant Commander: Using Principles of War to Win Peace |
10 MAY 2007 |
24 pages |
| Authors:
Heath D. Bohlen; NAVAL WAR COLL NEWPORT RI JOINT MILITARY OPERATIONS DEPT
|
| Though the importance of strategic communication (SC) has been identified and often conceptualized at the National/Strategic level, it is at the Theater level and below that much of the interaction with adversaries and potential adversaries takes place. As such, the ability of the U.S. to win the long war will rely heavily on the ability of geographic combatant commanders (GCCs) to effectively plan for and employ the instruments of soft ... |
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| Media: A Line of Operation for Urban Combat on the Operational Level |
09 MAY 2007 |
47 pages |
| Authors:
Erik Krivda; ARMY COMMAND AND GENERAL STAFF COLL FORT LEAVENWORTH KS SCHOOL OF ADVANCED MILITARY STUDIES
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| Understanding and leveraging the news media has become critical for operational-level commanders conducting urban combat operations. The insatiable public appetite for information has created conditions in which tactical actions can have severe strategic repercussions because of media reporting. In the 21st century, the operational-level commander conducting urban combat operations must clearly understand the influence that the news media has on operational success. Media influences on world public opinion can now ... |
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| Conjugate Gradient Based Reduced-Rank Signal Processing for Military Digital Communications |
01 MAY 2007 |
19 pages |
| Authors:
Michael D. Zoltowski; PURDUE UNIV LAFAYETTE IN SCHOOL OF ELECTRICAL AND COMPUTER ENGINEERING
|
| The project met the objectives of developing and transitioning fundamental advances in reduced-rank adaptive signal processing. The methods have been applied to space-time equalization and interference cancellation with application to high-speed, MIMO wireless military digital communications. There was an emphasis on exploitation of second-order spatial statistics of the channel and temporal statistics of the interference to design transceivers for multi-antenna wireless communication systems. Based on space-time spreading, we showed that ... |
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| Bone Conduction: Anatomy, Physiology, and Communication |
MAY 2007 |
206 pages |
| Authors:
Paula Henry; Tomasz R. Letowski; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD HUMAN RESEARCH AND ENGINEERING DIRECTORATE
|
| Humans hear through air and bone conduction pathways. Both pathways can be used to transmit sound to a listener and from a talker although traditionally, the air conduction pathway has been used. Communication through bone conduction is a feasible alternative to air conduction reception and transmission and provides benefits to the user that an air conduction system cannot provide. This report combines results of an extensive literature review of the ... |
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| The Mitigation of Radio Noise from External Sources at Receiving Sites |
MAY 2007 |
128 pages |
| Authors:
Wilbur R. Vincent; George F. Munsch; Richard W. Adler; Andrew A. Parker; NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF ELECTRICAL AND COMPUTER ENGINEERING
|
| Procedures to locate radio-noise source, identify source hardware, and mitigate noise problems are provided where the sources are external to a receiving site. In addition, procedures to assess the impact of man-made radio noise on signal reception are included. These procedures were developed over three decades of radio-noise investigations at more than 45 radio-receiving sites. |
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| Military Operations. Actions Needed to Improve DOD's Stability Operations Approach and Enhance Interagency Planning |
MAY 2007 |
61 pages |
| Authors:
Janet A. St.Laurent; Robert L. Repasky; T. Burke; Stephen Faherty; Susan Ditto; Ron L. Lake; Kate Lenane; Jonathan Carver; Maria-Alaina Rambus; Christopher Banks; GOVERNMENT ACCOUNTABILITY OFFICE WASHINGTON DC
|
| DOD components have developed guidance to facilitate the integration of UAS into combat operations; however, further steps are needed to fully coordinate the deployment of these assets. For example, DOD developed a Multi-Service Tactics, Techniques, and Procedures for the Tactical Employment of Unmanned Aircraft Systems and a Joint Concept of Operations for Unmanned Aircraft Systems.5 This guidance represents an important first step for the use of UAS in combat operations ... |
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| New Military Strategic Communications System |
MAY 2007 |
64 pages |
| Authors:
Robert F. Baldwin; ARMY COMMAND AND GENERAL STAFF COLL FORT LEAVENWORTH KS SCHOOL OF ADVANCED MILITARY STUDIES
|
| The United States government and the US military are struggling with strategic communications. To succeed the USG must improve its ability to understand the social context and cultural characteristics of the population, identify target audiences from a population, and engage the target audience through unified action. The Quadrennial Defense Review Roadmap for Strategic Communications and the Department of Defense, Report of the Defense Science Board Task Force on Strategic Communication ... |
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| Wireless Networks: Implications for Aircraft Loads Monitoring |
MAY 2007 |
|
| Authors:
Chris G. Knight; DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION VICTORIA (AUSTRALIA) AIR VEHICLES DIV
|
| A variety of new wireless technologies offer some advantages when used for direct strain monitoring of rotating components, particularly for rotary wing aircraft. This technical note investigates some of these technologies, including one developed in house by Air Vehicles Division. The use of wireless technology is advantageous as it avoids the use of slip rings and other current methods for monitoring strain where the component to be investigated rotates relative ... |
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| Boarding Team Communications Phase I: Product Development and Evaluation |
MAY 2007 |
26 pages |
| Authors:
Michael J. Doyal; Brian Khey; Michael Chien; Joan D. Silver; COAST GUARD RESEARCH AND DEVELOPMENT CENTER GROTON CT
|
| The U.S. Coast Guard (CG) Research and Development Center has developed Boarding Team Communications (BT COMMS), a wireless ad hoc mesh network solution for the CG Boarding Team below-decks connectivity problem. BT COMMS works where UHF/VHF radios do not and overcomes the problems associated with conventional radio frequency voice repeaters. BT COMMS has proven its capability for providing 100 percent connectivity in critical boarding areas during exercises on a variety ... |
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| A Strong Zero-One Law for Connectivity in One-Dimensional Geometric Random Graphs With Non-Vanishing Densities |
30 APR 2007 |
22 pages |
| Authors:
Guang Han; Armand M. Makowski; MARYLAND UNIV COLLEGE PARK INST FOR SYSTEMS RESEARCH
|
| We consider the geometric random graph where n points are distributed independently on the unit interval [0, 1] according to some probability distribution function F. Two nodes communicate with each other if their distance is less than some transmission range. When F admits a continuous density f which is strictly positive on [0, 1], we show that the property of graph connectivity exhibits a strong critical threshold and we identify ... |
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| Global Broadcast Service Security Classification/Declassification Guide (SCG) |
29 APR 2007 |
43 pages |
| Authors:
SPACE AND MISSILE SYSTEMS CENTER LOS ANGELES AFB CA MILITARY SATELLITE COMMUNICATIONS JOINT PROGRAM OFFICE
|
| The Global Broadcast Service (GBS) is an extension of the Global Information Grid (GIG) that provides worldwide, high capacity, one-way transmission of video, imagery, and other high-bandwidth information, via Transmit Suites (including Theater Injection Points (TIP's)) to Receive Suites, supporting the nation's command centers and joint combat forces in garrison, in transit, and deployed within global combat zones. It employs readily available satellite-based broadcast commercial technologies, which are relatively inexpensive ... |
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| Future Naval Concepts -- Crew Reductions through Improved Damage Control Communications (FNC-CRIDCC) |
18 APR 2007 |
87 pages |
| Authors:
Thomas T. Street; Frederick W. Williams; L. S. Cooper; III Halloway Kenneth E.; Michael Rininger; Charles Miller; Bradley Shirley; Samuel Genovese; David Showalter; Stephen Zak; MANAGEMENT AND TECHNICAL SERVICES (MTS) INC VIRGINIA BEACH VA
|
| The object of the Damage Control (DC) Triad program was to develop a Damage Control Communications system, which would be damage tolerant and remain operable in casualty situations where DC communications are vital. The current state of the art in communications technologies (WLAN, enhanced VoIP Power Line Communications, and Sound-Powered Phone implementations) should allow the implementation of the system without a costly R&D program. This report details the communications technologies ... |
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| Architectures for Secure and Robust Distributed Infrastructures |
02 APR 2007 |
35 pages |
| Authors:
Sanjay Lall; Carolyn Beck; Stephen Boyd; John Doyle; Geir Dullerud; Chris Hadjicostis; Muriel Medard; Balaji Prabhakar; Rayadurgam Srikant; George Verghese; STANFORD UNIV CA DEPT OF AERONAUTICS AND ASTRONAUTICS
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| The major barrier constraining the successful management and design of large-scale distributed infrastructures is the conspicuous lack of knowledge about their dynamical features and behaviors. Up until very recently analysis of systems such as the Internet, or the national electricity distribution system, have primarily relied on the use of non-dynamical models, which neglect their complex, and frequently subtle, inherent dynamical properties. These traditional approaches have enjoyed considerable success while systems ... |
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| Effects of Multimodal Displays About Threat Location on Target Acquisition and Attention to Visual and Auditory Communications |
APR 2007 |
56 pages |
| Authors:
Monica M. Glumm; Kathy L. Kehring; Timothy L. White; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD
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| This laboratory experiment examined the effects of paired sensory cues that indicate the location of targets on target acquisition performance, the recall of information presented in concurrent visual and auditory communications, and perceived workload. The multimodal cueing techniques assessed in this study were Visual+Spatial Language, Visual+3-D Audio, Visual+Tactile, and Spatial Language+Tactile. A unimodal visual only cue was included as a baseline. Except for reaction times to cues, no significant differences ... |
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| Non-Electronic Radio Front-End (NERF) |
APR 2007 |
14 pages |
| Authors:
Bahram Jalali; DEFENSE ADVANCED RESEARCH PROJECTS AGENCY ARLINGTON VA
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| Radio frequency (RF) communication systems are particularly vulnerable because the antenna provides a direct port of entry for electromagnetic radiation. This report describes a new type of RF receiver front-end that features a complete absence of electronic circuitry and metal interconnects the traditional soft spots of a conventional RF receiver. The device consists of a dielectric resonator antenna that concentrates and feeds the signal onto a resonant electro-optic field sensor. ... |
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| Awareness of Emerging Wireless Technologies: Ad-hoc and Personal Area Networks Standards and Emerging Technologies (Sensibilisation a l'emergence des technologies sans fil: technologies emergeantes et normes de reseaux personnels et ad-hoc) |
APR 2007 |
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| Authors:
George Stassinopoulos; L. Boucher; M. Churavy; T. Plesse; D. Marquart; S. Kyriazakos; N. Papaoulakis; D. Nikitopoulos; T. Maseng; NATO RESEARCH AND TECHNOLOGY ORGANIZATION NEUILLY-SUR-SEINE (FRANCE)
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| How wireless technologies and devices are proliferating, finding wide acceptance and possibilities for deployment, is the key target of this report. Range, bandwidth and power constraints are, as in the civilian world, prominent issues and each technology described is placed for covering part of these conflicting requirements. The report starts with ad-hoc networking concepts and maturing technological solutions. Ad-hoc networking is a necessary companion to wireless communication, due to the ... |
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Radio Communications
