...the future of systems engineering can be said to be model-based according to the International Council on Systems Engineering (INCOSE) vision for 2020. Within Australia, Model-Based Systems Engineering (MBSE) is emerging on a greater number of projects and across a broader range of organisations. The 2012 MBSE Symposium explored the innovative application of MBSE methodologies to Concept Engineering. Concept Engineering can be described as the application of systems engineering principles,...
Topics: DTIC Archive, DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA) WEAPONS SYSTEMS...
The engineering of complex systems-of-systems (SoS) is one of the main challenges facing Defence in the development, acquisition and implementation of integrated warfighting capabilities. SoSs are ubiquitous within Defence, yet there is currently little effort to engineer these systems and capabilities.
Topics: DTIC Archive, DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA) MARITIME OPERATIONS...
Information Security is traditionally treated in three main categories: Confidentiality, Integrity, and Availability. While much work has been done on modelling Confidentiality and Availability, aspects involving comprehensive modelling and quality of data integrity in complex systems appear to be, on a relative scale, much less well understood and implemented. Further, most work on Integrity and resultant implementations seems to have focussed more on a matters related to source authentication...
Topics: DTIC Archive, DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA), *INFORMATION...
We describe an efficient method for tracking humans in a multi-camera network. Based on online clustering, the proposed method groups single-camera tracks into mutually exclusive subsets corresponding to individuals. Experiments indicate that the algorithm is capable of achieving strong tracking accuracy on simulated data.
Topics: DTIC Archive, DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA), *CAMERAS,...
This report consists of a literature review and analysis of the existing research concerning countering violent extremism. This multifaceted report demonstrates the complexity of understanding Violent Extremism and best strategies to Countering Violent Extremism. This has been undertaken with the broader analysis of radicalisation and social cohesion theories, models and government policies and how they may impact on or contribute to best practice and policy in countering violent extremism.
Topics: DTIC Archive, DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA), *COUNTERTERRORISM,...
The Buccaneer CubeSat will be fitted with a high frequency antenna made from spring steel measuring tape. The geometry of the antenna is described as open bowtie. In the microgravity of low Earth orbit there is a risk that the antenna will collapse or bend due to the extremely small loads. Worst case empirical analysis has shown that the antenna will remain deployed in low Earth orbit. This has been shown in the presence of worst case environmental loads due to aerodynamic drag (at 300km) and...
Topics: DTIC Archive, DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA) INTELLIGENCE...
The aim of the work is to examine the possibility of developing a tool to track, monitor and predict large complex system development by enhancing the clarity of how decisions at lower levels impact on the goals of the project. The approach uses Maritime Operations Division s (MOD) established ability in combat system performance modelling using MBSE and attempts to connect that level to Operational Capabilities and hence Strategy. The paper leverages off MBSE tool capabilities, developments...
Topics: DTIC Archive, DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA) MARITIME OPERATIONS...
The requirement of validating a new donor for the LSGT used at DSTO has arisen due to changes in ingredient availability for local donor manufacture, and also the availability to import commercial donors from overseas. A donor (manufacture by Accurate Energetic Systems) has been selected for evaluation for use in the LSGT at DSTO by performance and LSGT characterisation. The donor specifications are identical to the donors used in the NOL LSGT and a calibration for the LSGT at DSTO has also...
Topics: DTIC Archive, DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA) WEAPONS SYSTEMS...
In January 2005, Defence Science and Technology Organisation (DSTO) staff contributed to a workshop exploring the utility and validity of an intellectual capital framework for Defence, developed by the Office of the Chief Information Officer. In particular DSTO staff provided guidance and support to the workshop process. A narrative approach (utilising narrative circles or storytelling, designed to facilitate rapid and in depth sense making) was used to complement a more traditional structured...
Topics: DTIC Archive, Bergin, Sean, DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA)...
A system-of-systems engineering approach to suit the Australian land force capability integration challenge is developed drawing on the international body of knowledge. The approach proposed would require only quite modest resources. The nature of the activities and the artefacts to produce are defined, with a focus on SoS requirements engineering aspects and how these influence the resulting project- and SoS-level test and evaluation activities.
Topics: DTIC Archive, DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA) LAND OPERATIONS...
The process of archiving Australian Government Records in the National Archives of Australia is non-trivial. Archiving a Department of Defence Software Development Project has added complexities. This document describes and illustrates the steps involved in the archiving of such a project. It also records the process and the issues to be considered, with the intention that others directed toward such a task will not need to rediscover the process and its requirements.
Topics: DTIC Archive, DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA) COMMAND CONTROL...
Johnson-Laird suggests that difficulties in problem solving can be explained by the mental models theory. This study tests linear separability effects in categorisation and inference as an alternate explanation, hypothesising that categorisation and inference would be easier for linearly separable (LS) functions than nonlinearly separable (NLS). Thirty two participants were tested on one LS and one NLS functions over repeated trials. Results indicated that categorisation and inference were...
Topics: DTIC Archive, DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA) LAND OPERATIONS...
This report assesses two types of explosive line wave generator which can be used for line initiation of an explosive charge. The two types are a perforated triangle design utilising equal path lengths through the explosive to create a straight detonation wave; and an explosive lens design employing two explosives with different detonation velocities to remove the curvature from the detonation wave. A Cordin high speed camera was used for imaging the detonation wave to assess the degree of...
Topics: DTIC Archive, DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA), *EXPLOSIVES,...
In his 2003 review into Defence procurement, Kinnaird recommended that for new acquisitions Defence undertake a comprehensive analysis of technology, cost and schedule risks and that Government needs to be assured that adequate scrutiny is undertaken by DSTO on technology feasibility, maturity and overall technical risk . As a result, DSTO performs Technical Risk Assessments (TRA) to inform major acquisition decisions during the Requirements phase of the Capability Development process.
Topics: DTIC Archive, DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA) WEAPONS SYSTEMS...
A formal theory approach to semantic fusion is proposed and its philosophical, mathematical and computational development is illustrated through a formal theory for existence.
Topics: DTIC Archive, DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA) COMMAND AND CONTROL...
The detection performance of a wide variety of multistatic buoy field layouts is compared using a recently developed method. The analysis applies to large area search; no consideration is given to situations where the search area can be covered with a few sonobuoys. The preferred layout depends on the ratio CR of receiver cost to source cost. At CR 1, the best performing layout is a square grid; near CR = 0.5 it is hexagonal; for CR 0.1, several layouts give comparable performance. These...
Topics: DTIC Archive, DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA) MARITIME OPERATIONS...
In this report, the initial design of a search mode for the Experimental Phased-Array Radar 2 (XPAR-2) system developed at DSTO is addressed. A track-while-scan search method combined with a one-step detection algorithm is proposed for implementation. Effects of discrete and distributed land clutter on detection performance are analysed. Limitation of clutter attenuation due to oscillator phase noise is addressed. Three options for waveform and pulse repetition frequency (PRF) selections are...
Topics: DTIC Archive, DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA), *RADAR,...
We investigate the possibility of using fractal geometry to construct radiating elements for phased array radar. We seek to understand whether the characteristics of individual fractal designs can give rise to multi-band or broadband performance and we do this by looking at Hilbert curves, log-periodic and circular-log-periodic radiating elements. We present the theory and discuss software that has been developed in order to model fractal elements and we present our findings accordingly.
Topics: DTIC Archive, Kyprianou, Ross, DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA),...
Registration is central to Image Processing problems which use Tactical Imagery. Any application, which involves comparing two or more images, requires some type of Registration algorithm. These algorithms have evolved over the years and are generally grouped into three categories: 2D, 3D, and the reasonably unusual combination of 2D/3D. An updated classification (or taxonomy) for the diverse collection of algorithms is presented here and is described in detail. Also, two new algorithms are...
Topics: DTIC Archive, Backman, R B, DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA)...
Data association, or determining correspondence between targets and measurements, is a very difficult problem that is of great practical importance. In this paper we formulate the classical multi-target data association problem as a graphical model and demonstrate the remarkable performance that approximate inference methods, specifically loopy belief propagation can provide. We apply it to calculating marginal association weights (e.g., for JPDA) for single scan and multiple scan problems, and...
Topics: DTIC Archive, DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA) INTELLIGENCE...
Modern conflicts feature civil-military operations conducted by multinational coalitions involving military forces, international agencies and other organisations. Influence diagrams are a visualization tool that can be employed to support the collective C2 by facilitating a clear communication of commanders' intent and organising a concerted effort for its implementation. They can enable a common operating picture and distribution of roles and responsibilities among the participants in the...
Topics: DTIC Archive, DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA), *MILITARY...
A new method designated as the mean-to-mean ratio (MMR) test is proposed for the detection of nonhomogeneities in a radar's Constant False Alarm Rate (CFAR) reference window. No a priori knowledge of the nonhomogeneity topology is assumed. Analysis using the Monte-Carlo method based on Rayleigh clutter and Swerling I target models is presented. Target-like interferences which seriously degrade the detection performance of the cell-averaging CFAR detector can be detected with a higher...
Topics: DTIC Archive, DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA), *FALSE ALARMS,...
This report reviews the published literature on the characteristics of mono-static radar sea-clutter observed with high grazing angles (typically above about 10 degrees). To date, most of the analysis and modelling of sea-clutter has been undertaken at low grazing angles with the main application being for surface and airborne maritime radars. The report identifies some of the data sets that have been collected and the empirical models that have been developed from them for the normalised radar...
Topics: DTIC Archive, DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA), *GRAZING ANGLES,...
Military personnel may be required to conduct command and control tasks whilst under various levels of motion. This study examined whether there were performance degradations for typical tasks that commanders may be expected to complete whilst on the move. It was found that there were no differences in task performance between the static and mild levels of motion, but there were differences between the mild and high levels of motion. It was also found that participants performed better at tasks...
Topics: DTIC Archive, DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA) LAND OPERATIONS...
We present a literature review on the problem of camera network topology discovery, focussing on its two main types: overlapping and non-overlapping camera fields of view. These two problems are fundamentally different and each requires a specifically tailored approach. We describe the most popular approaches for each problem and analyse their suitability for our project. The INVS (Intelligent Networked Video Surveillance) project has been ongoing in the ISRD IAE Group since 2007. The 2010-2011...
Topics: DTIC Archive, DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA), *CAMERAS, *NETWORK...
This document reviews the state-of-the-art in Cyber Range implementations and related computer network operations (CNO) testbeds. We summarise recently published examples and describe their purpose and functionality. The compiled information should assist organisations to make an informed decision when considering a Cyber Range capability.
Topics: DTIC Archive, DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA) CYBER AND...
This essay, which reviews the foundations, extensions, and challenges of cognitive work analysis, is based on a keynote address delivered at the 10th International Naturalistic Decision Making Conference held in Orlando, Florida from 31 May to 3 June, 2011. It describes the origins of cognitive work analysis and the utility of this framework for designing ecological interfaces, as well as for tackling a variety of other design challenges, particularly, the design of teams or organisations. Also...
Topics: DTIC Archive, DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA) AIR OPERATIONS DIV,...
This report presents a hybrid method for simulating sequences of correlated Gamma random variables for modelling sea clutter, using a combination of linear and/or non-linear transforms. Depending on the shape parameter, this method minimises the use of non-linear transformations. Mathematically the method is simpler than its counterpart methods which leads to a quicker simulation run time. Two memoryless non-linear transform (MNLT) approaches are also studied with comparative results showing...
Topics: DTIC Archive, DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA), *SEA CLUTTER,...
MBSE tools and techniques in a broad sense provide a structured approach to developing conceptual models of complex systems. Key features of these approaches are: the use of graphical based views on a central model that reflect the interests of particular stakeholders in the system; hierarchical decomposition of the system in question; and an ability to add, over time, increasing levels of detail to the model as knowledge is acquired, or in other words allow the model to move from the abstract...
Topics: DTIC Archive, DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA) WEAPONS SYSTEMS...
This report investigates techniques for detecting fine scale scene changes using repeat pass Synthetic Aperture Radar (SAR) imagery. As SAR is a coherent imaging system two forms of change detection may be considered, namely incoherent and coherent change detection. Incoherent change detection identifies changes in the mean backscatter power of a scene typically via an average intensity ratio change statistic. Coherent change detection on the other hand, identifies changes in both the amplitude...
Topics: DTIC Archive, Preiss, Mark, DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA),...
This document describes the details of implementing the UniSec ontology in the Web Ontology Language (OWL) using the Protege ontology development tool, and testing it with the Pellet reasoning engine to evaluate its usefulness.
Topics: DTIC Archive, DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA) COMMAND CONTROL...
Influx is a reasoning component of REALISE, a generic platform for intelligent systems currently under investigation as part of an ongoing research program conducted by the CAO Branch. Influx is envisioned to have two major uses: facilitating and mediating reasoning processes for intelligent missions, and serving as a tool and framework for reasoning under uncertainty. This document reports on some initial research and development efforts pertaining to the reasoning aspect of Influx in the...
Topics: DTIC Archive, DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA) CYBER AND...
Cyber Red Teaming (CRT) is an important exercise to conduct for Defence agencies built on large technological infrastructures. Their size and relative importance may make them high priority targets for criminal organizations, issue-motivated groups and even foreign governments that are increasingly capable and willing to use technology for intelligence gathering. However identifying a viable attack can be a time-consuming process, and so Automated Planners are being considered as a viable...
Topics: DTIC Archive, DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA) CYBER AND...
More people are using Online Social Networks (OSNs) at home and in the workplace. To help us understand the risks associated with their use, this paper reviews notable literature regarding network security risks due to OSN usage. The literature states that there are many possible attacks that can be carried out using OSNs, including information gathering, phishing and JavaScript exploits. There are also a number of technical and non-technical methods available to manage these security risks,...
Topics: DTIC Archive, DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA) CYBER AND...
Android is a quickly maturing open source platform that is being widely adopted by individuals and by organisations (including Defence). This document describes a proto- type implementation of a secure ad hoc networking system for Commercial Off The Shelf (COTS) Android platforms with a focus on extensibility and security. This implementa- tion utilises Near Field Communication (NFC) and Bluetooth to create secure, mutually authenticated ad hoc networks between devices for the sharing of...
Topics: DTIC Archive, DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA) CYBER AND...
The Mission Success Prediction Capability (MSPC) is a Model-Based Systems Engineering (MBSE) approach to mission planning, used for analysis of complex systems of precision strike (air-to-surface) weapons. This report focuses on developing a statistical method for evaluating the probability of mission success in these situations. Bayesian networks are used as a framework for calculation of the probability in question, and a general methodology for the evaluation is formed and demonstrated in...
Topics: DTIC Archive, DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA), *AIR TO SURFACE...
An ontology captures in a computer-processable language the important concepts in a particular domain and the relationships between these concepts. Ontologies are becoming increasingly pervasive in various fields of computer and information science. They are indispensable components of many complex information systems, especially systems in which communication among heterogeneous components is critical. I use the following definition of ontology, which captures the essence of the most widely...
Topics: DTIC Archive, DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA), *INFORMATION...
While often thought of as a Dark Art, debugging is nevertheless a necessary part of fielding quality computing systems which can and should be done systematically. Service Oriented Architectures (SOAs) show great promise but also represent one of the most challenging environments in which to debug system services. In addition to all the issues of distributed and parallel debugging, SOAs introduce the complexity of significant parts of one's programs being provided by others. This paper examines...
Topics: DTIC Archive, DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA) COMMAND CONTROL...
Calculations of sonar-system performance for anti-submarine warfare yield detection probability as a function of range to the target; whereas sonar operators typically think in terms of a 'detection range'. This Note considers how to connect these two concepts for active sonar. Four types of probability are explored and their relative advantages teased out in the light of realworld examples. It is concluded that cumulative probability of track initiation provides the most practical route to a...
Topics: DTIC Archive, DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA) MARITIME OPERATIONS...
To confidently predict structural and building damage due to explosive blast loads, Threat Mitigation Group, Weapons Systems Division, is comparing, improving and validating existing modelling tools. For conventional structures, the Vulnerability Assessment and Protection Options (VAPO) software, a product of the Defense Threat Reduction Agency (DTRA), is DSTO's primary effects prediction software tool due to the rapidity with which an analysis can be conducted and the ability of the software...
Topics: DTIC Archive, DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA) WEAPONS SYSTEMS...
Track-Before-Detect (TkBD) is a paradigm that combines the target detection and estimation processes that are usually sequentially applied to sensor data in a conventional system. Under TkBD the single frame detector is removed and the tracker is supplied with the whole sensor image. Detection decisions are then shifted to the output of the tracker which is able to use temporal correlation to improve the decision performance. A fundamental measure used by most TkBD approaches is the likelihood...
Topics: DTIC Archive, DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA), *MEASUREMENT,...
DNAN or 2,4-dinitroanisole is a new melt-cast matrix that replaces traditional TNT based melt-cast explosives. Aside from sensitiveness improvements, the use of DNAN allows for the continued operation of existing melt-cast facilities (for example the Australian Munitions plants located at Mulwala and Benalla) without the need for major plant modifications. Weapons and Combat Systems Division (WCSD) has developed several DNAN based formulations that have been extensively characterised and in an...
Topics: DTIC Archive, DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA), *INSENSITIVE...
The use of automation in uninhabited aerial vehicles (UAVs) is being explored using simulation to develop a better balance of system autonomy with human interaction for optimal human-system performance. Integrating fixed levels of automation into elements of UAV control has resulted in improved performance of some tasks, but less so when the automation does not fit appropriately to changing UAV tasks and environments. As a consequence, recent research has focused on automation that can be...
Topics: DTIC Archive, DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA) WEAPONS SYSTEMS...
The Pareto Distribution is proposed as a new model for high resolution, high grazing angle radar sea clutter returns. It is assessed using the Ingara radar clutter gathered in 2004. Included is range profile modelling as well as global distributional fitting to clutter streams.
Topics: DTIC Archive, DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA) ELECTRONIC WARFARE...
This note is a tutorial in matrix manipulation and the normal distribution of statistics, concepts that are important for deriving and analysing the Kalman Filter, a basic tool of signal processing. We focus on the proof of the well-known fact that the sum of two n-dimensional normal probability density functions is also normal. While this theorem is usually taken for granted in the signal processing field, proving it provides an insightful excursion into techniques such as Gaussian integrals...
Topics: DTIC Archive, Koks, Don, DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA), *KALMAN...
The use of the Automatic Identification System (AIS) has been mandated for ships over 300 gross tonne since December 2004. Through Border Protection Command, DSTO was tasked to assist the Australian Maritime Safety Authority with the assessment of the performance of AIS and a new variant AIS-B. AIS-B is a cut down version meant for smaller vessels but there have been concerns by the maritime community that AIS-B cannot be detected sufficiently by vessels carrying AIS. This report covers a three...
Topics: DTIC Archive, DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA) MARITIME OPERATIONS...
..the future of systems engineering can be said to be model-based according to the International Council on Systems Engineering (INCOSE) vision for 2020. Within Australia, Model-Based Systems Engineering (MBSE) is emerging on a greater number of projects and across a broader range of organisations. The 2012 MBSE Symposium explored the innovative application of MBSE methodologies to Concept Engineering. Concept Engineering can be described as the application of systems engineering principles,...
Topics: DTIC Archive, DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA) WEAPONS SYSTEMS...
NEW AIR COMBAT CAPABILITY (NACC) PROJECT: In June 2002, Australia decided to join JSF development phase. Proposed replacement of the Air Combat and Strike capabilities provided by F/A-18 Hornet and F-111. Replacement required next decade. NACC Project: Provide S&T advice to support JSF acquisition approval. Large scale participation across Government, Defence and Industry. Focus of presentation is on Operational Analysis activities.
Topics: DTIC Archive, Rigopoulos, John, DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA)...
This report reviews work on the identification of people in video recordings by their gait, or walking style. It considers the adjustments needed when the subjects walk other than straight across the image and may not offer the convenient side (fronto-parallel) view. It describes a study of this case using video sequences of walking people, and concludes that the available measurements of gait, apart from head height, are of limited use.
Topics: DTIC Archive, DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA) INTELLIGENCE...
This document considers the use of a partially known prototype signal to enhance the time difference of arrival (TDOA) computation for an On-Off Keyed (OOK) signal. It is shown through analysis and simulation that this approach can achieve a considerable reduction in the SNR threshold at which an acceptable rms TDOA spread can be achieved. For a signal transmitted with a carrier frequency that is stable within each observation interval, the threshold improvement can be in excess of 10 dB for a...
Topics: DTIC Archive, DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA) COMMAND CONTROL...
