| UWB Impulse Radar Characterization and Processing Techniques |
28 SEP 2005 |
|
| Authors:
Greg Barrie; DEFENCE RESEARCH AND DEVELOPMENT CANADAOTTAWA (ONTARIO)
|
 | Ultra-Wideband (UWB) impulse radar is inherently a noise-limited technology. While sub-nanosecond pulses achieve good range resolution, the resultant extreme bandwidth exacts a toll on system performance in terms of noise power entering the receiver. Data must be processed efficiently to yield an acceptable signal to noise ratio (SNR), and to enhance structural details of the return pulse. This is achieved by a combination of ensemble averaging to reduce thermal fluctuations ... |
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| Parabolic Reflector Modelling Techniques with a Laterally Displaced Feed |
21 SEP 2005 |
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| Authors:
Frederic Arpin; DEFENCE RESEARCH AND DEVELOPMENT CANADAOTTAWA (ONTARIO)
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| This document looks at two techniques for modelling the radiation pattern of a parabolic reflector antenna. Both these methods use physical optics to determine the induced currents on the reflector due to the feed. The first method uses MATLAB's numerical integration routine to compute the far-field radiation pattern. The second method involves segmenting the reflector surface and approximating the amplitude and phase of the surface currents by a first degree ... |
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| CapDEM TDP - DND Capability Decision-Making Process: the As-Is |
21 SEP 2005 |
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| Authors:
Gaetane Harvey; Jocelyn Leclerc; Genevieve Dussault; DEFENCE RESEARCH AND DEVELOPMENT CANADAOTTAWA (ONTARIO)
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| The purpose of this document is to describe the current DND/CF Acquisition process as well as the associated decision-making process in order to provide the project team with a common understanding of the current situation, to identify the corresponding needs and deficiencies and to provide a significant input to the definition of a new Capability Engineering Process (CEP). |
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| MarCoPola Polarimetric SAR Trial: Signatures of Multiple Vessels with Aligned Operating Conditions |
SEP 2005 |
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| Authors:
Chen Liu; Nicholas Sandirasegaram; Ryan A. English; Lloyd Gallop; Dave Schlingmeier; DEFENCE RESEARCH AND DEVELOPMENT CANADAOTTAWA (ONTARIO)
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| This memorandum addresses design, experimentation, and data collection components of the MarCoPola Polarimetric Signature trial that was conducted off the coast of Halifax, Nova Scotia, March 22-26, 2004 in conjunction with the CFAV Quest trial Q-281. Four ships participated as maritime targets in the experiments: Quest, CCGS Sir Wilfred Grenfell and CCGC Sambro, and Divecom III. C-band Synthetic Aperture Radar imagery of these targets was collected using the sensor on ... |
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| A Multi-Packet Signature Approach to Passive Operating System Detection |
31 AUG 2005 |
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| Authors:
Annie De Montigny-Leboeuf; DEFENCE RESEARCH AND DEVELOPMENT CANADAOTTAWA (ONTARIO)
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| Remote operating system discovery can provide valuable contextual information regarding the computers connected to the network. In particular, operating system discovery can help identify potential vulnerable computers or may help prioritize alarms and responses in times of attack. The Network Security Research Group at the Communication Research Centre (CRC) has developed novel techniques for passive operating system discovery. The methodology developed allows derivation of a signature from a set of ... |
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| Design and Analysis of a Yagi-Like Antenna Element Buried in LTCC Material for AEHF Communication Systems |
24 AUG 2005 |
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| Authors:
Michel Clenet; DEFENCE RESEARCH AND DEVELOPMENT CANADAOTTAWA (ONTARIO)
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| This document presents the investigation of an end-fire antenna implemented in a laminated material named LTCC (Low Temperature Co-fired Ceramic). This study is related to the development of a phased array for the AEHF Military Satellite Communication Systems. This work includes the design, the analysis, fabrication and the measurement of antenna prototypes at 44.5 GHz. The radiating element consists of a Yagi-like antenna fed by a microstrip transmission line and ... |
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| The Dynamic VPN Controller. Secure Information Sharing in a Coalition Environment |
24 AUG 2005 |
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| Authors:
S. Zeber; J. Spagnolo; D. Cayer; DEFENCE RESEARCH AND DEVELOPMENT CANADAOTTAWA (ONTARIO)
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| Defence R&D Canada (DRDC) developed the dynamic virtual private network controller (DVC) prototype as a concept demonstrator for the rapid deployment and self-configuration of one or more dynamic coalition virtual private networks (VPNs), and has demonstrated the DVC prototype in both local and international environments. The DRDC DVC prototype is a network boundary protection device that provides access to its protected network infrastructure in a controlled fashion to one or ... |
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| Network Centric Operations: Challenges Associated with the Human-in-the-Loop |
24 AUG 2005 |
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| Authors:
Orrick White; DEFENCE RESEARCH AND DEVELOPMENT CANADAOTTAWA (ONTARIO)
|
| The human-system interface is central for achieving Network Centric Operations (NCO). Without systems that are designed to be human-centric, NCO will be a "non-starter." Given this reality, studies of command and control compatibility between human operators and the network are crucial. Without this human-oriented focus, unintended consequences will inevitably occur. Unfortunately, this would be just what the gurus of network-centric operations were trying to overcome. |
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| Simulation of Multi-Platform Geolocation Using a Hybrid TDOA/AOA Method |
24 AUG 2005 |
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| Authors:
Huai-Jing Du; Jim P. Lee; DEFENCE RESEARCH AND DEVELOPMENT CANADAOTTAWA (ONTARIO)
|
| The problem of geolocation of radar emitters has been studied extensively in the past decades. Several location methods such as the methods based on measuring frequency difference of arrival (FDOA), time difference of arrival (TDOA), angle of arrival (AOA), etc., have been investigated in the past. However, each method has its own advantages and limitations in terms of location accuracy. This report presents a multi-platform geolocation scheme by combining TDOA ... |
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| Maximum Likelihood Based ESM/Radar Track Association Algorithm in a New Modified Polar Coordinate |
24 AUG 2005 |
|
| Authors:
Yifeng Zhou; Winston Li; Henry Leung; DEFENCE RESEARCH AND DEVELOPMENT CANADAOTTAWA (ONTARIO)
|
| Association of radar and ESM tracks is an important component for multisensor-multitarget tracking systems. It is essential to the overall performance of a track fusion process. In this report, we present an ESM/track association algorithm in a new modified polar coordinate (MPC) system. The algorithm is based on a theoretical performance analysis of ESM/radar track association techniques in the MPC. Formulas for computing the correct and false association probabilities with ... |
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| Availability and Use of Medical Isotopes in Canada - Performed as part of a Radiological Terrorism Risk Assessment |
24 AUG 2005 |
|
| Authors:
Carey L. Larsson; DEFENCE RESEARCH AND DEVELOPMENT CANADAOTTAWA (ONTARIO)
|
| An assessment of the availability of radioactive material used for medical applications in Canada has been performed as part of the CBRN Research and Technology Initiative (CRTI) Project CRTI-02-0024RD (Probabilistic Risk Assessment Tool for Radiological Dispersal Devices). A general list of medical radioisotopes used worldwide was compiled via literature searches and Internet investigations. This list was then compared to all isotopes licenced to health care facilities in Canada. Noble gases, ... |
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| Time Domain Bistatic SAR Processor |
24 AUG 2005 |
|
| Authors:
Niluefen Cotuk; Christoph Gierull; DEFENCE RESEARCH AND DEVELOPMENT CANADAOTTAWA (ONTARIO)
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| The Defence R&D Canada - Ottawa (DRDC Ottawa) is participating in a joint experiment with the Air Force Research Laboratory (AFRL) in Rome, New York under TTRDP. The objective of this study is to understand bistatic radar and bistatic clutter statistics, and to investigate processing methods with the ultimate aim of detecting airborne targets. As part of this study SAR processing techniques are developed for bistatic SAR data. The data ... |
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| Viability Assessment Report on TTRDP GMTI Constallation Study |
24 AUG 2005 |
|
| Authors:
Rahim Jassemi-Zargani; Girish Rao; DEFENCE RESEARCH AND DEVELOPMENT CANADAOTTAWA (ONTARIO)
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| Driven by the potential military utility of a satellite constellation providing wide-area space based surveillance, the Trilateral Technology Research and Development Program (TTRDP) envisaged a framework that supports constellation concept design, assessment modeling and system feasibility studies. The concept design's "study and evolve" approach was institutionalized by formulating various teams, each oriented towards distinct research activity, to cooperatively feed on each others inferences. The performance assessment activity kicked-off with an ... |
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| Non-Lethal Weapons: Opportunities for R&D |
24 AUG 2005 |
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| Authors:
Harold Stocker; John Dick; Gilles Berube; DEFENCE RESEARCH AND DEVELOPMENT CANADAOTTAWA (ONTARIO)
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| The aim of this overview study is to recommend the Non-Lethal Weapon (NLW) research and development that Defence Research and Development Canada (DRDC) could conduct over the next decade (and possibly beyond) in response to emerging defence and security NLW requirements. It summarizes the DRDC perspective of NLW technologies, which includes non-lethal applications of electro-magnetic and acoustic directed energy. The study shows that by channeling existing expertise and effort, DRDC ... |
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| Statistical Cross-Correlation Algorithms for Temporal Pulse Profiles |
24 AUG 2005 |
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| Authors:
Fred A. Dilkes; DEFENCE RESEARCH AND DEVELOPMENT CANADAOTTAWA (ONTARIO)
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| Two statistical techniques are presented for comparing temporal pulse trains received from an Electronic Support receiver to a priori templates representing the expected behaviour of radar signals. The techniques implement a specialized cross-correlation procedure and incorporate the effects of non-cumulative jitter. A theoretical basis is presented in which the signal of interest is modeled to be present in a noisy channel. The channel noise may include the failure to detect ... |
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| A Strong Three-Factor Authentication Device: Trusted DAVE and the New Generic Content-Based Information Security (CBIS) Architecture |
24 AUG 2005 |
|
| Authors:
J. Savoie; DEFENCE RESEARCH AND DEVELOPMENT CANADAOTTAWA (ONTARIO)
|
| This report has three objectives. The first objective is to provide a description/analysis of the Trusted DAVE activity performed by DRDC Ottawa and its contractors. The second is to describe different systems where the demonstrator produced under this activity could be used. The last is to analyse, study, and compare different types of network/system architectures. The activity involved the development of three elements: A secure design for a three-factor Trusted ... |
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| Specification and Modelling of Maritime Surveillance and SAR Performance for Procurements |
24 AUG 2005 |
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| Authors:
Michael K. McDonald; Anthony Damini; DEFENCE RESEARCH AND DEVELOPMENT CANADAOTTAWA (ONTARIO)
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| The work performed in support of the radar procurements for the Aurora Incremental Modernization Program (AIMP)and the Maritime Helicopter Program (MHP) during the evaluation and design phases is presented. The report focuses on the maritime surveillance and Synthetic Aperture Radar (SAR) modes and develops appropriate methods for predicting and modelling their respective performance. Issues such as the choice of appropriate target and clutter models, detection techniques and SAR imaging performance ... |
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| Review of the Composability Problem for System Evaluation |
24 AUG 2005 |
|
| Authors:
Dan Craigen; Mark Saaltink; DEFENCE RESEARCH AND DEVELOPMENT CANADAOTTAWA (ONTARIO)
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| This report presents the results of a review of the security evaluation of composite systems to determine the current status of this topic, especially with respect to work that has been done in this area and tools and techniques that have been developed. Recommendations on how security evaluation could be applied to the DRDC/NIO Secure Access Manager are also included. |
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| Through-Wall Synthetic Aperture Radar (TWSAR) 3D Imaging: Algorithm Design |
24 AUG 2005 |
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| Authors:
Greg B. Barrie; DEFENCE RESEARCH AND DEVELOPMENT CANADAOTTAWA (ONTARIO)
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| Typical synthetic aperture radar (SAR) images are two-dimensional, providing range and azimuth information, but furnish few details with respect to elevation. One approach to extend SAR to three-dimensional imaging is to replace the single antenna element by an array of antenna elements. The simplest such implementation of this would be a linear array oriented vertically. This report contains two sections, the first outlining data and image processing for a threedimensional ... |
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| Investigation of a Neural Network Implementation of a TCP Packet Anomaly Detection System |
24 AUG 2005 |
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| Authors:
M. Dondo; J. Treurniet; DEFENCE RESEARCH AND DEVELOPMENT CANADAOTTAWA (ONTARIO)
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| We present the design and implementation of an artificial neural network (ANN) system of multi-layer perceptron classifiers to detect suspicious TCP traffic at a single packet level. The advantage to using ANNs for the detection of attacks is that they do not only rely on attack signatures, as in many common signature-based IDSs. Rather they are capable of learning broader definitions of attack attributes. The use of ANNs in this ... |
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| Feasibility Study for Enhanced CC-130 Search and Rescue Capability With a Ground Penetrating Radar |
24 AUG 2005 |
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| Authors:
Roger Vickers; DEFENCE RESEARCH AND DEVELOPMENT CANADAOTTAWA (ONTARIO)
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| Penetration radars have been successful in detecting and locating many types of metallic targets under foliage, including flat plates, vehicles, reflectors, and pipes. The purpose of this study is two-fold: (1) define the radar operating parameters, especially frequency, that would maximise the chances of success for a penetration radar mounted on the CC-130 for detection of downed aircraft in search and rescue operations; and (2) investigate the feasibility of mounting ... |
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| An Overview of the CapDEM Integrated Engineering Environment |
JUL 2005 |
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| Authors:
Sylvia Lam; Shiva Poursina; Tim Spafford; DEFENCE RESEARCH AND DEVELOPMENT CANADAOTTAWA (ONTARIO)
|
| In order to gain a better understanding of the approach and the technology requirements to support collaborative engineering activities, the Collaborative Capability Definition, Engineering and Management (CapDEM) Technology Demonstration Project (TDP) initiated an effort to implement a Collaborative Engineering Environment (CEE). The US Naval CEE served as an early reference for the CapDEM team. The Integrated Engineering Environment (IEE) described in this report is one component of the Naval CEE. ... |
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| JSMARTS Initiative: Advanced Distributed Simulation Across the Government of Canada, Academia and Industry - Technical Description |
JUL 2005 |
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| Authors:
B. Kim; B. Johnson; R. Youssef; A. L. Vallerand; C. Herdman; M. Gamble; R. Lavoie; D. Kurts; K. Gladstone; DEFENCE RESEARCH AND DEVELOPMENT CANADAOTTAWA (ONTARIO)
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| JSMARTS (Joint Simulation, Modeling for Material Acquisition, Requirements, Training and Support), or Joint SMARRT (Simulation and Modeling for Acquisition, Requirements, Rehearsal and Training) represents a new concept for DND (Department of National Defence). It is conceptualized as a vision of M&S (Modeling & Simulation) at the Enterprise level, led by ADM(Mat). In an effort to reduce the technical risk associated with networking simulation stakeholders at various levels of the DND ... |
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| DRDC Ottawa Working Standard for Biological Dosimetry |
JUL 2005 |
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| Authors:
Tamika M. Segura; Louise Prud'homme-Lalonde; Erika Thorleifson; Sylvie Lachapelle; Dana Mullins; Sami Qutob; Diana Wilkinson; DEFENCE RESEARCH AND DEVELOPMENT CANADAOTTAWA (ONTARIO)
|
| This Standard provides quality assurance, quality control, and evaluation of the performance criteria for the purpose of accreditation of the Radiation Biology laboratory at Defence Research & Development Canada - Ottawa (DRDC Ottawa) using biological dosimetry to predict radiation exposure doses. The International Standard (ISO 19238) and the International Atomic Energy Association (IAEA) Technical Report Series No. 405 are used as guiding documents in preparation of this working document specific ... |
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| Synthetic Environments at the Enterprise Level: Overview of a Government of Canada (GoC), Academia and Industry Distributed Synthetic Environment Initiative |
APR 2005 |
|
| Authors:
A. L. Vallerand; B. Kim; R. Youssef; P. Hubbard; D. Skinner; B. Murray; S. Poursina; C. M. Herdman; M. Gamble; DEFENCE RESEARCH AND DEVELOPMENT CANADAOTTAWA (ONTARIO)
|
| A new partnership between the Government of Canada (GoC), Industry and Academia is working to help Canada become a world leader in Modeling and Simulation (M&S). The goal is to take SMARRT technologies - Simulation and Modeling for Acquisition, Requirements, Rehearsal and Training - and apply them to the development and improvement of Canadian Forces (CF) military systems and capabilities, as well as a vast host of civilian applications. To ... |
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| Change Detection Using RADARSAT-1 Interferometry: Mine Site Monitoring |
DEC 2004 |
|
| Authors:
Karim E. Mattar; DEFENCE RESEARCH AND DEVELOPMENT CANADAOTTAWA (ONTARIO)
|
| This study examines the potential of using satellite repeat-pass interferometry for wide-area surveillance and change detection. Several RADARSAT-1 interferometric datasets were acquired in 2003 over active mines in South Australia and Saskatchewan, Canada. Three-colour ROB images derived from the various image magnitudes supplements and complements the interferometric coherence information for detecting even subtle scene changes. Together they were found to be a potentially valuable tool for wide area surveillance and ... |
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| Secure Access Management: A Cots-Based Proof-Of-Concept |
DEC 2004 |
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| Authors:
S. Zeber; A. Magar; DEFENCE RESEARCH AND DEVELOPMENT CANADAOTTAWA (ONTARIO)
|
| This paper describes the successful demonstration of secure policy- based authorization using commercial products in a content-based information security architecture. |
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| Performance Versus Safety of Some Primary and Rechargeable Lithium Batteries |
DEC 2004 |
|
| Authors:
E. E. Andrukaitis; I. R. Hill; G. L. Torlone; DEFENCE RESEARCH AND DEVELOPMENT CANADAOTTAWA (ONTARIO)
|
| The performance and safety of selected portable, military batteries is discussed, with emphasis on extreme physical and electrical abuse tests, such as nail penetration and overcharging. The battery couples discussed are the lithium-sulphur dioxide and lithium-manganese dioxide non-rechargeable systems plus the nickel-metal hydride and lithium-ion rechargeable systems. |
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| Microwave Enhanced IR Detection of Landmines Using 915 MHz and 2450 MHz |
DEC 2004 |
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| Authors:
Howard Mende; Barbora Dej; Shyam Khanna; Rene Apps; Mike Boyle; Fraser Addison; DEFENCE RESEARCH AND DEVELOPMENT CANADAOTTAWA (ONTARIO)
|
| As a continuation of previous studies in microwave enhanced infrared (IR) detection of landmines at DRDC Ottawa, additional experiments were performed using a microwave source at 2450 MHz to illuminate buried inert antipersonnel and antitank landmines. Further experiments were performed for the first time using a microwave device at 915 MHz with an open waveguide. Infrared detection was accomplished using a FLIR A20M IR camera in the 8-12 mm region. ... |
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| The INSC Security Infrastructure |
DEC 2004 |
|
| Authors:
S. Zeber; DEFENCE RESEARCH AND DEVELOPMENT CANADAOTTAWA (ONTARIO)
|
| The INSC project was an international collaborative research and development activity established under an MOU among eight NATO nations to investigate and demonstrate a secure IPv6 network infrastructure capable of supporting a multi-national military coalition operation. The NATO C3 Agency also accepted an invitation to contribute although they did not sign the MOU. The goal was to demonstrate a network infrastructure that supported security, interoperability, manageability, and mobility. Security was ... |
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| Consolidated Canadian Results to the HEU Round Robin Exercise |
NOV 2004 |
|
| Authors:
Carey L. Larsson; Dean S. Haslip; DEFENCE RESEARCH AND DEVELOPMENT CANADAOTTAWA (ONTARIO)
|
| In the framework of combating the illicit trafficking of nuclear materials and other radioactive substances, the ITWO organised an international inter-laboratory round robin dealing with a thwarted illicit trafficking incident of a high-grade sample of highly enriched uranium (HEU). DRDC Ottawa coordinated Canada's response to the exercise, which included the participation of seven organisations, including this lab. The exercise involved a thorough forensic examination and analysis by the Royal Canadian ... |
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| Quest-2003 Polarimetric Signature Trial: Experiment Design, SAR calibration, Data Acquisition and Initial Results |
NOV 2004 |
|
| Authors:
Chen Liu; Lloyd Gallop; Dave Schlingmeier; DEFENCE RESEARCH AND DEVELOPMENT CANADAOTTAWA (ONTARIO)
|
| The Quest-2003 Polarimetric Signature Trial was successfully conducted off the coast of Halifax, Nova Scotia, using the Environment Canada CV-580 C-band SAR in conjunction with the CFAV Quest trial Q-277. This report addresses the polarimetric synthetic aperture radar (PolSAR) experiments that were conducted on 6 and 7 October, 2003. A radar calibration site was established at CFB Shearwater. It was composed of four comer reflectors (CRs), four active radar calibrators ... |
|
| Bistatic Synthetic Aperture Radar, TIF - Report (Phase 1) |
NOV 2004 |
|
| Authors:
Christoph H. Gierull; DEFENCE RESEARCH AND DEVELOPMENT CANADAOTTAWA (ONTARIO)
|
| This technical report presents theoretical and experimental results of phase I of the Technology Investment Fund (TIF) project on low probability of intercept, that is bistatic SAR. In bistatic SAR, the transmitter and receiver are spatially separated and hence, the risks of detection and localization are significantly reduced, i.e., its vulnerability to jamming is reduced and its survivability significantly increased. Bistatic SAR images include information that is complementary to monostatic ... |
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| Radar Signature Control Using Metamaterials (U) |
NOV 2004 |
|
| Authors:
L. Varga; DEFENCE RESEARCH AND DEVELOPMENT CANADAOTTAWA (ONTARIO)
|
| A method enabling the control of the radar signature using metamaterial is presented. The work was carried out using a Multiradius Bridge Current (MBC) Electromagnetic Moment Method code. The metamaterial specimen in this work is a 2D array of vertical wire segments each loaded with resistor and inductor. The results indicate that the far field directional gain of the metamaterial differs from the specular far field directional gain of a ... |
|
| Network-Centric Environment: A Modular Modeling and Simulation/Synthetic Environment (M&S/SE) framework |
NOV 2004 |
|
| Authors:
A. L. Vallerand; M. Thompson; DEFENCE RESEARCH AND DEVELOPMENT CANADAOTTAWA (ONTARIO)
|
| A modular Modeling & Simulation/Synthetic Environment (M&S/SE) framework for developing and supporting a network-centric or distributed Collaborative Synthetic Environments (CSE) is proposed and its specific and detailed requirements are documented here. It is proposed that such a framework is specifically designed to promote, foster, augment and expedite the standardization, interoperability, commonality, reusability, and seamless integration of M&S/SE systems including legacy systems in DND. Other Government Departments (OGD) and beyond. The ... |
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| Micro-Doppler Radar Signatures for Itelligent Target Recognition |
SEP 2004 |
|
| Authors:
T. Thayaparan; S. Abrol; E. Riseborough; DEFENCE RESEARCH AND DEVELOPMENT CANADAOTTAWA (ONTARIO)
|
| Mechanical vibrations or rotations (micro-motion dynamics) of structures on a target may introduce frequency modulation on the radar return from the target's body. The modulation due to this vibration or rotation is referred to as the micro-Doppler (m-D) phenomenon. In this report, the m-D effect is introduced and the mathematics of micro-Doppler signatures, induced by simple sinusoidal vibrations or rotations, is developed. Simulated results confirm that the mathematical analysis is ... |
|
| Electromagnetic Modeling in the Spectral Domain for Polarimetric Radar Applications: Theoretical Framework |
AUG 2004 |
|
| Authors:
Ramin Sabry; DEFENCE RESEARCH AND DEVELOPMENT CANADAOTTAWA (ONTARIO)
|
| A vectorial Fourier-based technique for electromagnetic (EM) wave reconstruction with application to polarimetric airborne and spaceborne radar data exploitation is presented. The approach provides a comprehensive picture of scattering through an electromagnetic-based formulation of equivalent sources and introduction of vector scattering functions. The method is different from conventional modeling techniques for SAR applications as result of the full electromagnetic treatment of field interaction with the scatterer, the possibility of introducing ... |
|
| The Role of Ionospheric Clutter in Mid-Latitude and Arctic Regions for Assessment of HFSWR Surveillance |
APR 2004 |
|
| Authors:
Thayananthan Thayaparan; John MacDougall; DEFENCE RESEARCH AND DEVELOPMENT CANADAOTTAWA (ONTARIO)
|
| The ionosphere is the region of the earth's atmosphere in which gases are ionized by radiation such as ultraviolet light from the sun and cosmic rays from outer space. The unwanted radar echoes from the ionosphere are collectively called ionospheric clutter. This paper studies the arctic and mid-latitude ionospheric environment using ionosonde data and assesses High-Frequency Surface-Wave Radar (HFSWR) surveillance for surface vessels and low-altitude air targets. Although there are ... |
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| Radiation Induced Bystander Effects in Human Lymphoblastoid Cells |
DEC 2003 |
|
| Authors:
Tamika M. Segura; Diana Wilkinson; Louise Prud'honne-Lalonde; Erika M. Thorleifson; Sylvie Lachapelle; DEFENCE RESEARCH AND DEVELOPMENT CANADAOTTAWA (ONTARIO)
|
| It is well accepted that cells, in response to radiation, may release transmissible factors. These transmissible factors, clastogenic factors, have been reported to induce genomic instability in cells that have not been directly exposed to radiation. We hypothesize that this observed bystander effect might be a consequence of cellular interactions via secretory proteins released by the irradiated cells to affect the non-irradiated cells and initiate a systemic stress response to ... |
|
| On the Implementation of Iterative Detection in Real-World MIMO Wireless Systems |
DEC 2003 |
|
| Authors:
Yvo DE Jong; DEFENCE RESEARCH AND DEVELOPMENT CANADAOTTAWA (ONTARIO)
|
| Theoretically. multiple-input multiple-output (MIMO) wireless systems can achieve remarkably high spectral efficiency as compared to conventional, single-antenna systems. This report identifies a number of problems which need to be solved in order to implement practical MIMO systems: channel estimation, correlated fading, slow fading, asynchronous reception, and frequency-selective fading. The effects of these non-ideal conditions on the performance of MIMO systems are evaluated. and directions are explored in which solutions may ... |
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| Arctic Shoreline Delineation & Feature Detection Using RADARSAT-1 Interferometry: Case Study Over Alert |
DEC 2003 |
|
| Authors:
Karim E. Mattar; Lloyd Gallop; DEFENCE RESEARCH AND DEVELOPMENT CANADAOTTAWA (ONTARIO)
|
| Extensive ground truth carried out in and around Alert in 2002 permitting testing the geometric calibration of RADARSAT- 1, optimizing the capability of RADARSAT- 1 interferometry to delineate coastlines and riverbeds in an Arctic environment, and investigating the detection of various targets and features of potential interest. Surveyed comer reflectors helped demonstrate that a ground reference point greatly improves the geometric calibration of RADARSAT-1 images. A new coherence filter was ... |
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| A New Approach in Time-Frequency Analysis with Applications to Experimental High Range Resolution Radar Data |
NOV 2003 |
|
| Authors:
Thayananthan Thayaparan; George Lampropoulos; DEFENCE RESEARCH AND DEVELOPMENT CANADAOTTAWA (ONTARIO)
|
| This report presents trade-off studies on Time-Frequency Distribution (TFD) algorithms and a methodology for fusing them to achieve better target characterization. It is shown that TFD algorithmic fusion considerably increases the detectability of signals while suppressing artifacts and noise. The report reviews a sample of representative TFD algorithms. Their performance is studied from a qualitative and quantitative point of view. For simplicity, we considered the mean-squared error as a measure ... |
|
| Analysis of Chemical Warfare Agents by GC-MS: First Chemical Cluster CRTI Training Exercise |
OCT 2003 |
|
| Authors:
Paul A. D'Agostino; C. R. Lepage; J. R. Hancock; C. L. Chenier; DEFENCE RESEARCH AND DEVELOPMENT CANADAOTTAWA (ONTARIO)
|
| The Chemical Cluster, one of three clusters created by the Chemical, biological, radiological and nuclear Research and Technology Initiative (CRTI), was established to help Canada prepare for possible terrorist events. This working group, made up of representatives from Canadian government departments, has identified a number of chemicals of concern and assigned laboratories with appropriate expertise to provide the analytical support necessary to confirm these compounds in suspect samples. The Royal ... |
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| Polarimetric Interferometric Experiment Trials for Years 2001 and 2002: Experiment Design Ground Truthing Data Quality and Analysis |
SEP 2003 |
|
| Authors:
Maureen Yeremy; Chuck Livingstone; Karim Mattar; Lloyd Gallop; Janice Lang; DEFENCE RESEARCH AND DEVELOPMENT CANADAOTTAWA (ONTARIO)
|
| Synthetic Aperture Radar (SAR) theory has several disciplines which includes Polarimetric SAR (PolSAR) and Interferometric SAR (InSAR). Recent research in the past decade has introduced a new method which utilizes both of these disciplines and is called Polarimetric Interferometric SAR (Pol InSAR). Research to date has been focussed on determining forest heights from interferograms constructed from PolSAR data which has been decomposed so that the data can be preferentially weighted ... |
|
| Polarimetric Interferometric SAR: Literature Review and an Assessment of its Utility for DND: TIF Project Memorandum |
SEP 2003 |
|
| Authors:
Karim E. Mattar; Maureen L. Yeremy; Chuck Livingstone; DEFENCE RESEARCH AND DEVELOPMENT CANADAOTTAWA (ONTARIO)
|
| Polarimetric Interferometric Synthetic Aperture Radar (SAR) is a recent area of research that has had significant attention from the mid-1990s. This area of research has combined the utility of two SAR technologies: Polarimetric SAR (PolSAR) and Interferometric SAR (InSAR). Polarimetric SAR provides four channels which can be used to determine the polarimetric ellipse, and hence, structural information of the scatterer. Therefore PolSAR is suitable for target recognition and detection applications. ... |
|
| Distortion in ISAR Imaging and Restoration of Distorted ISAR Images |
SEP 2003 |
|
| Authors:
S. Wong; G. Duff; E. Riseborough; DEFENCE RESEARCH AND DEVELOPMENT CANADAOTTAWA (ONTARIO)
|
| A physics based numerical model has been developed to describe the gross distortion on ISAR images due to small perturbed target motion. Quantitative results obtained under controlled experimental conditions on the target's motion have confirmed that large distortion in the ISAR image of the target can occur. The experimental data give excellent agreement with the model results. The distortion is a consequence of the phase modulation effect in the radar ... |
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| Experimental Investigations on the Distortion of ISAR Images Using Different Radar Waveforms |
SEP 2003 |
|
| Authors:
S. Wong; E. Riseborough; G. Duff; DEFENCE RESEARCH AND DEVELOPMENT CANADAOTTAWA (ONTARIO)
|
| The Inverse Synthetic Aperture Radar (ISAR) image of a target can be distorted as a result of a small perturbing motion possessed by the target. This has been observed regularly in radar imaging of moving targets such as in-flight aircraft, ships sailing on high seas and maneuvering ground vehicles. A Target Motion Simulator apparatus that simulates a target with small perturbing motion has been designed and built to study the ... |
|
| Estimation of Submarine Near-Bottom Hydrodynamic Loads and Squat |
APR 2003 |
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| Authors:
M. Mackay; DEFENCE RESEARCH AND DEVELOPMENT CANADAOTTAWA (ONTARIO)
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| This memorandum outlines a method for estimating the near-bottom loads on a submarine submerged in deep water and for the related problem of predicting submarine squat in deep or shallow water. The method is fully three- dimensional, but has some limitations associated with potential flow and linearization of the free surface. The chief difficulty for this study was the dearth of suitable data available for validation. Nevertheless, the results are ... |
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| Sampling Handling and Analysis Method for Chemical Warfare Agents in Soils Contaminated With Chemical and/or Biological Warfare Agents |
APR 2003 |
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| Authors:
P. A. D'Agostino; C. L. Chenier; J. R. Hancock; DEFENCE RESEARCH AND DEVELOPMENT CANADAOTTAWA (ONTARIO)
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| A sample handling and analysis method was developed for the identification of chemical warfare agents (as intact compounds or as their hydrolysis products) in samples suspected to contain either chemical or biological warfare agent contamination. The method, based on aqueous extraction, autoclaving of the aqueous extract and LC-ESI-MS analysis was evaluated using three soil samples spiked at the 80 microgram/g level with triethyl phosphate, isopropyl methylphosphonic acid or thiodiglycol. All ... |
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| Knowledge Management Strategy and Framework (Stategie et cadre de gestion du savoir) |
APR 2003 |
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| Authors:
DEFENCE RESEARCH AND DEVELOPMENT CANADAOTTAWA (ONTARIO)
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| Knowledge management (KM) is the strategic management of the creation and use of knowledge for increased innovation, value and excellence. The KM strategy supports the Defence Research and Development (R&D) Canada (DRDC) vision of becoming the best in defence R&D through five objectives: Clarifying and focusing the mission so that employees and management are able to understand the intention and prioritize their efforts; Developing corporate information management tools and information ... |
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