| Illumination Waveform Design for Non-Gaussian Multi-Hypothesis Target Classification in Cognitive Radar |
Jun 2012 |
110 pages |
| Authors:
Ke N Wang; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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 | A cognitive radar (CR) system is one that observes and learns from the environment, then uses a dynamic closed-loop feedback mechanism to adapt the illumination waveform so as to provide system performance improvements over traditional radar systems. A CR system that performs multiple hypothesis target classification and exploits the spectral sparsity of correlated narrowband target responses to achieve significant performance improvements over traditional radars that use wideband illumination pulses was ... |
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| In-Situ Wave Observations in the High Resolution Air-Sea Interaction DRI |
30 Sep 2011 |
8 pages |
| Authors:
Thomas H Herbers; Tim T Janssen; NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF OCEANOGRAPHY
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| Ocean wave prediction models, based on a spectral energy balance, are widely used to obtain wind-wave forecasts and hindcasts on global and regional scales (e.g., Komen et al., 1994). However, these inherently stochastic models assume a Gaussian and homogeneous sea state and thus do not describe the nonlinear instability processes that can dramatically alter the structure of wave groups and produce anomalously large waves, also known as freak or rogue ... |
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| Attenuation of Spurious Impulses from an Ultra-Wideband Radar: A High-Speed Switch for the Synchronous Impulse Reconstruction (SIRE) Frontend |
Sep 2011 |
36 pages |
| Authors:
Gregory Mazzaro; Marc Ressler; Gregory Smith; Francois Koenig; ARMY RESEARCH LAB ADELPHI MD
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| The performance of ultra-wideband (UWB) radar systems suffers from reflections between frontend components caused by impedance mismatch. The Synchronous Impulse Reconstruction (SIRE) radar built by the U.S. Army Research Laboratory (ARL) is no exception. While most of the radio frequency (RF) energy in each impulse is transmitted by the radar as desired, a portion of the RF energy reflects within the radar frontend. Undesired impulse echoes arrive back at the ... |
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| Design Requirements for Weaponizing Man-Portable UAS in Support of Counter-Sniper Operations |
Sep 2011 |
125 pages |
| Authors:
Derek J Snyder; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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| The sniper is a highly successful tool used by the enemy to create both physical and psychological effects on U.S. and Coalition forces. A single enemy sniper can pin down an entire company-sized element for an extended period of time, resulting in measurable disruptions in operations. This threat is as old as the rifle itself but has been somewhat shadowed by the proliferation of the Improvised Explosive Device (IED) over ... |
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| Coverage of Continuous Regions in Euclidean Space Using Homogeneous Resources with Application to the Allocation of the Phased Array Radar Systems |
JUN 2011 |
145 pages |
| Authors:
Kassandra M. Merritt; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
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| Air surveillance of United States territory is an essential Department of Defense function. In the event of an incoming aerial attack on North America, the DoD, Department of Homeland Security, and Federal Aviation Administration surveillance capabilities are critical to discovering and tracking the threat so that it can be eliminated. Many of the currently used surveillance radar will reach the end of their design life within ten to twenty years. ... |
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| Development of Enhanced Performance Tunable RF Materials and Devices for On The Move (OTM) Communication Systems |
06 Dec 2010 |
19 pages |
| Authors:
Jr Mireles Jose; Perla E Garcia-Casillas; Carlos A Martinez-Perez; David Zubia; UNIVERSIDAD AUTONOMA DE CIUDAD JUAREZ (MEXICO)
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| This report summarizes the different experiments performed in the Universidad Autonoma de Ciudad Juarez (UACJ) and the University of Texas at El Paso (UTEP) to begin a new line of study for our community in radar materials. Radars require materials that have high diffraction coefficient (n) and they need to be electrically insulating at the same time. The current research was inspired by our sponsor: the Army Research Laboratories (ARL) ... |
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| RF Radiation Environment Over Millstone Hill |
14-Dec-2009 |
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| Authors:
T A Cott; MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB
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 | This report documents a study of the RP radiation environment in the vicinity of the Lincoln Space Surveillance Complex radars. The focus of this HOPEhe study is a model-based analysis of the hazards to occupants of aircraft flying in the vicinity of the radars, comparing computed exposure levels with safety standards for the general public set by the Massachusetts Department of Public Health. |
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| Long-Range Ballistic Missile Defense in Europe |
22-Jun-2009 |
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| Authors:
Carl Ek; Steven A Hildreth; LIBRARY OF CONGRESS WASHINGTON DC CONGRESSIONAL RESEARCH SERVICE
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| Successive U.S. governments have urged the creation of an anti-missile system to protect against long-range ballistic missile threats from adversary states. The Bush Administration believed that North Korea and Iran represented strategic threats, and questioned whether they could be deterred by conventional means. The Bush Administration's position on this issue remained unchanged, even after the intelligence community assessed that the Iranian nuclear weapons program halted in 2003. The Bush Administration ... |
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| Navy Ford (CVN-78) Class Aircraft Carrier Program: Background and Issues for Congress |
20-May-2009 |
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| Authors:
Ronald O'Rourke; LIBRARY OF CONGRESS WASHINGTON DC CONGRESSIONAL RESEARCH SERVICE
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| CVN-78 and CVN-79 are the first two ships in the Navy's new Gerald R. Ford (CVN-78) class of nuclear-powered aircraft carriers. CVN-78 was procured in FY2008 and is scheduled to enter service in 2015. The ship's procurement cost is estimated in the proposed FY2010 budget at $10,846 million in then-year dollars -- $389 million (about 3.7%) more than the estimate in the FY2009 budget. Although CVN-78 was procured in FY2008, ... |
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| Navy Ford (CVN-78) Class Aircraft Carrier Program: Background and Issues for Congress |
03-Oct-2008 |
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| Authors:
Ronald O'Rourke; LIBRARY OF CONGRESS WASHINGTON DC CONGRESSIONAL RESEARCH SERVICE
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| The Navy's proposed FY2009 budget requested $2,712 million in procurement funding for CVN-78, the first ship in the Gerald R. Ford (CVN-78) class of aircraft carriers, which was earlier known as the CVN-21 class. Although CVN-78 was procured in FY2008, the Navy's budget includes procurement funding for the ship in FY2009, FY2010, and FY2011. The Navy's proposed FY2008 budget also requested $1,214 million in advance procurement funding for CVN-79, the ... |
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| MIMO Radar: A Multi-Sensor Spatially Diverse Radar Architecture |
28-Aug-2008 |
48 pages |
| Authors:
Alexander M Haimovich; NEW JERSEY INST OF TECH NEWARK
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| The research supported by this grant: (a) provides an in depth analysis of the localization accuracy gain attainable with the MIMO radar systems by means of the Cramer-Rao Lower bound (b) introduces the geometric dilution of precision (GDOP) metric and the contour mapping, providing an insight into the relative performance accuracy for a given layout of radars over a given geographic area. These plots offer a clear understanding of the ... |
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| Creating an Effective Multi-Domain Wide-Area Surveillance Platform to Enhance Border Security |
MAR 2008 |
101 pages |
| Authors:
Randall S. Parsley; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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| North American Aerospace Defense Command (NORAD) and United States Northern Command (USNORTHCOM) lack persistent, multi-domain, wide-area surveillance (WAS) to conduct their assigned homeland defense and homeland security missions. Wide-area surveillance allows military operators to see vast expanses of the homeland. For example, it is the difference between a view of Texas and a view of the broad U.S. southern border - from Texas to California. With WAS, the Department of ... |
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| Nonstationary Interference Excision for Noise Radar Systems using Time-Frequency based Methods |
DEC 2007 |
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| Authors:
T. Thayaparan; M. Dakovic; L. Stankovic; DEFENCE RESEARCH AND DEVELOPMENT CANADA OTTAWA (ONTARIO)
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| The problem addressed in this memorandum is nonstationary interference suppression in noise radar systems. Towards this aim, linear time-frequency (TF) transforms, short time Fourier transform (STFT) and local polynomial Fourier transform (LPFT) are used as a means of signal representation. The noise radar return signal is a wideband random signal occupying the whole TF plane, while the interference signal is well concentrated in the TF plane. This implies that the ... |
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| An Analysis of the Benefits and Savings of the Center of Excellence within the Fleet Readiness Centers |
DEC 2007 |
59 pages |
| Authors:
Philip Deboe; John Goolsby; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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| Recognizing the need to reduce cost, Naval Air Systems Command (NAVAIR) reorganized the Intermediate and Depot level maintenance structures to form the combined Fleet Readiness Center. By combining Intermediate and Depot facilities, NAVAIR can reduce Aviation Depot Level Repairable (AVDLR) costs by interdicting Beyond Capable Maintenance AVDLR's. NAVAIR further consolidated the Naval Aviation Enterprise by creating Centers of Excellence (COE) at designated FRC's to limit the amount of repair sites ... |
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| Performance Comparison of RADARSAT-2 Advanced Moving Object Detection Experiment Modes |
DEC 2007 |
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| Authors:
S. Chiu; DEFENCE RESEARCH AND DEVELOPMENT CANADA OTTAWA (ONTARIO)
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| It has been recognized that a two-aperture approach to ground moving target indication is sub-optimum and that target parameter estimation is often compromised by clutter interference or poor signal-to-clutter ratios. This paper investigates the Ground Moving Target Indication (GMTI) performance of several virtual channel concepts proposed for the RADARSAT-2 Moving Object Detection EXperiment (MODEX). These are capable of increasing the spatial diversity of RADARSAT-2 by exploiting its very flexible antenna ... |
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| Long-Range Ballistic Missile Defense in Europe |
25 JUL 2007 |
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| Authors:
Steven A. Hildreth; Carl Ek; LIBRARY OF CONGRESS WASHINGTON DC CONGRESSIONAL RESEARCH SERVICE
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| Successive U.S. administrations have urged the creation of an anti-missile system to protect against threats from rogue states. The Bush Administration believes that North Korea and Iran are strategic threats and questions whether they can be deterred by conventional means. The Administration has built long-range missile defense bases in Alaska and California to protect against North Korean missiles. The system has been tested, with mixed results, and questions have been ... |
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| Power-Aperture Product, Efficiency, Signal to Noise Ratio and Search Function Time of Weighted Phased Arrays |
JUL 2007 |
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| Authors:
Aris Alexopoulos; Andrew Shaw; DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA) ELECTRONIC WARFARE AND RADAR DIVISION
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| The power-aperture product and efficiency of weighted phased arrays is examined for various windows. The impact on the signal to noise ratio is also investigated for the use of windows on the transmit and receive modes of operation of the array and we examine the dependence of the search function time on the array windows. In determining the search function time to conduct surveillance over a given region of space ... |
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| Proposed U.S. Missile Defense Assets in Europe |
JUN 2007 |
13 pages |
| Authors:
MISSILE DEFENSE AGENCY WASHINGTON DC
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| Some of the world's most dangerous and unpredictable regimes either have already acquired, or are attempting to acquire, weapons of mass destruction (WMD). These regimes also are developing and/or acquiring ballistic missiles of increasing ranges, payloads, lethality, and sophistication as a means of delivery. In the future, these regimes could use these asymmetric weapons to pursue their objectives through force, coercion, and/or intimidation as they have done in the past. ... |
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| Sea-Based Ballistic Missile Defense - Background and Issues for Congress |
27 APR 2007 |
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| Authors:
Ronald O'Rourke; LIBRARY OF CONGRESS WASHINGTON DC CONGRESSIONAL RESEARCH SERVICE
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| As part of its effort to develop a global ballistic missile defense (BMD) system the Department of Defense (DOD) is modifying 18 Navy cruisers and destroyers for BMD operations, and has deployed a large BMD radar the Sea-Based X-Band Radar (SBX) on a modified floating oil platform. The eventual role for sea-based systems in the worldwide U.S. BMD architecture has not been determined. The overall issue for Congress for this ... |
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| The Multi-Lens Array Architecture |
26 FEB 2007 |
26 pages |
| Authors:
Danh Luu; AIR FORCE RESEARCH LAB HANSCOM AFB MA SENSORS DIRECTORATE
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| As communication and radar systems migrate toward wider bandwidths, the quantization lobes inherent in conventional phased array systems manifest as one of the foremost challenges for array designers who must consider not only the need for a large and inexpensive array with wideband requirements but also practical issues, such as the ease of transporting and realizing such an array. Large phased arrays based on conventional subarray architecture, with time delays ... |
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| Polarimetric Interferometry - Target Detection Applications |
01 FEB 2007 |
23 pages |
| Authors:
Martin Hellmann; Shane R. Cloude; GERMAN AEROSPACE CENTER KOLN (GERMANY) INST OF MATERIALS RESEARCH
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| In this section we consider the problem of radar detection of stationary targets obscured by foliage clutter. This is a classical detection problem for which the usual solution approach is to reduce the radar centre frequency as far as possible, so minimising scattering by the foliage while hopefully maintaining a significant target response. These approaches are based on backscatter intensity as the prime radar observable. In this paper we consider ... |
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| Present and Future Airborne and Space-borne Systems |
01 FEB 2007 |
29 pages |
| Authors:
Wolfgang Keydel; GERMAN AEROSPACE CENTER (DLR) WESSLING (GERMANY) MICROWAVES AND RADAR INST
|
| The state of the art of both airborne and space-borne SAR systems with polarimetric interferometry capability, their technological, system technical and application related specifications, and recent results obtained as well are presented shortly with respect to there relevance for Polarimetry and Interferometry capabilities. Space-borne SAR Interferometry in two pass mode reaches altitude accuracies of about 10 m and in one pass mode of < 6 m. With differential interferometry accuracies ... |
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| Alternatives for Military Space Radar |
JAN 2007 |
88 pages |
| Authors:
CONGRESSIONAL BUDGET OFFICE (U S CONGRESS) WASHINGTON DC
|
| The U.S. Air Force, National Reconnaissance Office, and National Geospatial-Intelligence Agency are developing a new radar reconnaissance satellite known as Space Radar to produce images of the Earth's surface using synthetic aperture radar (SAR) techniques and to detect moving targets on the ground, among other missions. The first launch of what would eventually be a constellation of Space Radar satellites is now planned for about 2015. Since the late 1970s, ... |
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| Sea-Based Ballistic Missile Defense - Background and Issues for Congress |
04 DEC 2006 |
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| Authors:
Ronald O'Rourke; LIBRARY OF CONGRESS WASHINGTON DC CONGRESSIONAL RESEARCH SERVICE
|
| In developing a global ballistic missile defense (BMD) system, the Department of Defense (DOD) currently is modifying 18 Navy cruisers and destroyers for BMD operations, and has placed a large BMD radar the Sea-Based X-Band Radar (SBX) on a modified floating oil platform. The eventual role for sea-based systems in the worldwide U.S. BMD architecture has not been determined. The issue for Congress for this report is: What should be ... |
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| Bi-Spectral Method for Radar Target Recognition |
DEC 2006 |
89 pages |
| Authors:
Jiunn W. Yeo; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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| Target recognition and identification in battlefields has been a crucial determinant to the ultimate success or failure of modern military campaigns. Since World War II, the Identification of Friend or Foe (IFF) systems installed in radar systems have served as the primary cooperative target identification techniques based on the "question and answer" interrogation loop of unidentified aircraft. However, the IFF system has a number of limitations that pose significant challenges ... |
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| Revolutionizing Doppler Radar With RF-Photonics |
01 NOV 2006 |
7 pages |
| Authors:
Weimin Zhou; Ming-Chiang Li; Olukayode Okusaga; Michael Stead; ARMY RESEARCH LAB ADELPHI MD
|
| We will discuss how to fundamentally improve radar systems by using RF-photonics in two ways: 1). Using a fiber-optic recirculation loop based interferoceiver to realize true correlation. It is an optimum extra-wideband radar receiver capable of measuring Doppler beating with a single pulse. Thsi eliminates Doppler range ambiguity. In addition, micro-Doppler signatures of any target become clearly recognizable for passive identification to prevent fratricide. 2). Further reduce the phase noise ... |
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| What Can We Learn About the Ionosphere Using the EISCAT Heating Facility? |
JUN 2006 |
41 pages |
| Authors:
Michael T. Rietveld; EISCAT SCIENTIFIC ASSOCIATION RAMFJORDBOTN (NORWAY)
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| Apart from being used for plasma physics, the HF facility near Tromsoe, Norway, can be used to perturb the ionosphere at various heights in different ways, thereby giving information about the ionosphere. The co-located incoherent scatter radars are probably the most powerful instrument for probing the ionosphere, but HF techniques can complement the radars and even have some advantages. The principal perturbation method is to increase the electron temperature in ... |
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| Doppler Aliasing Reduction on Wide-Angle Synthetic Aperture Radar Using Phase Modulated Random Stepped-Frequency Waveforms |
MAR 2006 |
79 pages |
| Authors:
Andrew W. Hyatt; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
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| This research effort examines the theory, application and results of side-looking airborne radar operation in hot clutter. Hot clutter is an electronic counter-measure used to degrade the performance of airborne radar. Hot clutter occurs by illuminating the ground with an airborne jammer at some velocity, azimuth, elevation, and range from the airborne radar. When the received RCS scattered hot clutter waveform is perfectly coherent with the radar waveform, the radar ... |
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| Counterfire Requirements in an Insurgency |
07-Feb-2006 |
14 pages |
| Authors:
J O Evans; G S Benson; B Kincaid; MARINE CORPS COMMAND AND STAFF COLL QUANTICO VA
|
| The U.S. and its coalition allies, conduct most operations from, secure locations, often called forward operating bases (FOBs) of Firm bases. However, constant enemy indirect fire attacks of rockets, artillery, and mortars have limited, even neutralized, the effectiveness of most U.S. operations primarily due to the second and third order consequences of these attacks. More often than not, indirect fire attacks occur on or near densely populated urban areas. Urban ... |
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| Active Lens: A Mass, Volume, and Energy Efficient Antenna for Space-Based Radar |
2006 |
7 pages |
| Authors:
Michael Grace; Bill Norvell; Kevin Higgins; Michael Gilbert; Hooman Kazemi; TOYON RESEARCH CORP GOLETA CA
|
| Very large, lightweight phased array antenna apertures are highly desirable for space-based ground surveillance and tracking radars since power is limited by the mass efficiency of solar power collection and distribution systems which compete for the limited payload capability of the launch vehicle. This leads to relatively low power density apertures whose power budget can be dominated by the overhead (nonradiated) power used during the receive portion of the radar ... |
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| Planar Magneto-Inductive Waveguide Devices |
16 DEC 2005 |
42 pages |
| Authors:
Richard R. Syms; IMPERIAL COLL LONDON (UNITED KINGDOM)
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| This report results from a contract tasking Imperial College London as follows: The Grantee will perform theoretical analysis and experimental investigations of simple planar magneto-inductive wave circuits based on closely coupled LC resonators and formed using low cost flexible PCB techniques. The aim will be to establish propagation characteristics, investigate coupling to electromagnetic radiation in straight sections and bends and demonstrate magnetic field concentration. |
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| Thermal Modeling of GaN HEMTs on Sapphire and Diamond |
DEC 2005 |
71 pages |
| Authors:
III Salm Roman P.; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Wide bandgap semiconductors have entered into Naval radar use and will eventually replace vacuum tube and conventional solid-state amplifiers for all modern military radar and communications applications. Gallium Nitride (GaN) High Electron Mobility Transistors (HEMTs) are on the leading edge of wide bandgap technology and have the performance characteristics to dominate in high power - high bandwidth applications. The Defense Advanced Research Projects Agency (DARPA), Office of Naval Research (ONR) ... |
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| Review of Radar Absorbing Materials |
24 AUG 2005 |
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| Authors:
Paul Saville; DEFENCE RESEARCH AND DEVELOPMENT ATLANTIC DARTMOUTH (CANADA)
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| Radar is a sensitive detection tool and since its development, methods for reducing microwave reflections have been explored. Radar absorbers can be classified as impedance matching or resonant absorbers. Radar absorbing materials are made from resistive and/or magnetic materials. Circuit analog materials give more design freedom through access to capacitive and inductive loss mechanisms. Dynamic absorbers can tune the absorption frequency through control of resistive and capacitive terms. Many conductive ... |
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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)
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| 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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| An Approach for Optimizing the On-Orbit Servicing Architecture for a Given Client Satellite Constellation |
24 AUG 2005 |
91 pages |
| Authors:
Michael L. McConnell; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
| Satellite systems, once operational, are essentially a consumable item with no capacity to maintain, repair, or upgrade them while on-orbit. In order to avoid having to replace costly space assets, the Defense Advanced Research Projects Agency (DARPA) and Air Force Space Command (AFSPC) are looking to developing programs to provide an on-orbit servicing capability for future satellite systems under development, such as the Space-Based Radar (SBR) system. DARPA and AFSPC ... |
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| Examples of a Class of Chaotic Radar Signals |
AUG 2005 |
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| Authors:
Graham V. Weinberg; Aris Alexopoulos; DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA) ELECTRONIC WARFARE AND RADAR DIVISION
|
| This note is a preliminary study of radar signals viewed as discretised nonlinear dynamical systems. Motivated by [Haykin and Li 1995], a class of recursively defined signals is introduced, and two specific examples are considered. It will be shown that such signals can exhibit complex dynamics in phase space. This means that they experience sensitive dependence on initial conditions. Using the Lyapunov spectrum, we determine the stability of these signals. ... |
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| Developing RADARSAT's METOC Capabilities in Support of Project Polar Epsilon |
AUG 2005 |
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| Authors:
B. G. Whitehouse; P. W. Vachon; A. C. Thomas; R. J. Quinn; DEFENCE RESEARCH AND DEVELOPMENT CANADA OTTAWA (ONTARIO)
|
| The Polar Epsilon project will use Canada's RADARSAT satellites to expand the Canadian Forces' space-based ship and oil spill detection capabilities in the Arctic, Atlantic and Pacific Oceans. RADARSAT's ability to detect ships and oil, however, is influenced by surface winds, waves and currents. As existing sources of meteorological and oceanographic data are too coarse in spatial resolution or too removed in time, this report investigates the feasibility of deriving ... |
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| Bistatic GPR by Using an Optical Electric Field Sensor |
25 JUL 2005 |
5 pages |
| Authors:
Seong-Jun Cho; Ryohei Tanaka; Motoyuki Sato; KOREA INST OF GEOSCIENCE AND MINERAL TAEJON
|
| In order to apply to land mine detection effectively, bistatic GPR using an optical electric field sensor as a receiver has been developed. The optical electric field sensor is very small and uses optical fiber instead of metallic coaxial cable. With the combination of these advantages and the bistatic radar system, it can be possible for an operator to measure quite flexible and safely. The sensor has been tested in ... |
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| A Case Study of Hibernia Illustrating the Benefits of AIS Transponders on Oilrigs |
JUL 2005 |
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| Authors:
T. R. Hammond; DEFENCE RESEARCH AND DEVELOPMENT ATLANTIC DARTMOUTH (CANADA)
|
| Automatic Identification Systems (AIS) are VHF transponders that continuously transmit detailed information about the vessels on which they are deployed. This information includes the ship's identity, course, destination, cargo, and position. As of the end of 2004, the use of AIS is mandatory for most international vessel traffic. This paper proposes that an AIS transponder be installed on the Hibernia oilrig, that the AIS data received by it be fused ... |
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| MIMO Coded Radar Waveform Design for Optimal Tracking |
14 JUN 2005 |
37 pages |
| Authors:
Langford B. White; Pinaki S. Ray; ADELAIDE UNIV (AUSTRALIA) SCHOOL OF ELECTRICAL AND ELECTRONIC ENGINEERING
|
| A conceptual framework for the design of transmit signals for MIMO radar systems as developed for communication signals has been formulated. This was achieved by constructing a generalized matched filter in analogy of the usual case. The corresponding maximum likelihood receiver was studied in detail and shown this to be optimal in accordance with the Cramer-Rao lower-bound criterion. Mathematics for defining and generating coding coefficients was developed. Tracking of a ... |
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| Code Inverse Filtering for Complete Sidelobe Removal in Binary Phase Coded Pulse Compression Systems |
May-2005 |
7 pages |
| Authors:
Robert C Daniels; Vilhelm Gregers-Hansen; NAVAL RESEARCH LAB WASHINGTON DC RADAR DIV
|
| Pulse compression is used in radar systems to improve range resolution while maintaining a high duty cycle. In addition to practical implementation constraints, the key issues for the selection of a pulse-compression waveform are mismatch loss, peak / integrated range sidelobes, and Doppler tolerance. While much progress has been made in the design of nonlinear frequency modulated (FM) chirp waveforms satisfying these requirements, the corresponding performance for binary phase-coded waveforms ... |
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| Performance Evaluation For Modern Radars |
14 APR 2005 |
8 pages |
| Authors:
Andrew G. Stove; David L. Hurd; THALES SENSORS CRAWLEY (UNITED KINGDOM)
|
| Modern radar systems are procured with tight specifications on a large number of different parameters. It is in the interests both of the customer and of the supplier that the procedures used evaluate radar performance are mathematically rigorous, precise and as cost-effective as possible. This paper describes some methods of evaluating the performance of different modes of modern radar systems and discusses the accuracy of which they are capable. The ... |
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| Optimal Adaptive Waveform Selection for Target Detection |
14 APR 2005 |
6 pages |
| Authors:
B. F. La Scala; W. Moran; R. J. Evans; MELBOURNE UNIV (AUSTRALIA) DEPT OF ELECTRICAL AND ELECRONIC ENGINEERING
|
| Modern phased array radars are able to adaptively modify their performance to the environment. To make full use of this capability, scheduling algorithms need to be designed. This paper poses the problem of adaptive waveform scheduling for detecting new targets in the context of finite horizon stochastic dynamic programming. The result is a scheduling algorithm that minimises the time taken to detect new targets, detecting these targets in accordance with ... |
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| A Comprehensive Multidisciplinary Program for Space-Time Adaptive Processing (STAP) |
MAR 2005 |
7 pages |
| Authors:
Tapan Sarkar; Michael Wicks; SYRACUSE UNIV NY
|
| The purpose of this effort was to perform focused research in the theory and strategies for space-time adaptive processing (STAP) in radar systems. The objective was to detect low flying targets in a severe clutter and jamming environment in real time. This was accomplished for Air Borne Radars by implementing two-dimensional adaptive filtering techniques in space (angle domain) and in time (Doppler domain) on High Performance Parallel computers. The initial ... |
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| Controlling Sideslip Angle to Reduce the Radar Exposure of a Tactical, Rotary Winged UAV |
MAR 2005 |
117 pages |
| Authors:
Jonathan D. Bulseco; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING AND MANAGEMENT
|
| This work investigates another way of contributing to the radar minimization solution for air vehicles in a threat environment. While much research has been conducted on structural solutions to radar exposure minimization, not much work has been done in the area of using control to continuously assess and present the smallest radar cross section of an air vehicle to oncoming threat radar systems by changing the aircraft's orientation. This work ... |
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| Transforming MACCS |
10-Jan-2005 |
12 pages |
| Authors:
Mark D Blydenburgh; MARINE CORPS COMMAND AND STAFF COLL QUANTICO VA
|
| *Whenever aircraft fail to arrive in response to a request from the ground, whatever the reason, the reaction is almost certain to be one of irritation. This quote addresses only one function of Marine aviation performed by the Marine Air Command and Control System (MACCS), however, it can be applied to everything the MACCS does. Whether directly or indirectly, the end result must be that troops on the ground are ... |
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| F/A-22 Raptor |
06 JAN 2005 |
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| Authors:
Christopher Bolkcom; LIBRARY OF CONGRESS WASHINGTON DC CONGRESSIONAL RESEARCH SERVICE
|
| The F/A-22 Raptor is a next-generation fighter/attack aircraft that features the latest stealth technology to reduce detection by radar. Using more advanced engines and avionics than the current F-15 Eagle, the F/A-22 is intended to maintain U.S. Air Force capabilities against more sophisticated aircraft and missiles in the 21st century. This report examines the Air Force's F/A-22 Raptor program, including costs and schedule; considers several key issues, and concludes with ... |
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| Lattice Spacing Effect on Scan Loss for Bat-Wing Phased Array Antennas |
01 JAN 2005 |
5 pages |
| Authors:
Thinh Q. Ho; Charles A. Hewett; Lilton N. Hunt; Thomas G. Ready; Raj Mittra; SPACE AND NAVAL WARFARE SYSTEMS CENTER SAN DIEGO CA
|
| Phased array antennas are becoming increasingly more important in communications and radar applications. In general, these arrays are designed to produce narrow directional beams with hemispherical coverage. From the system design perspective, a phased array antenna must be implemented using multiple co-located antenna panels to meet the gain requirement over the entire scan volume. In order to accomplish this technical objective, and yet at the same time minimize the total ... |
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| Radar-Based Detection, Tracking and Speciation of Marine Mammals from Ships |
01-Jan-2005 |
7 pages |
| Authors:
Douglas F DeProspo; Joseph Mobley; Wai Hom; Mike Carron; ARETE ASSOCIATES ARLINGTON VA
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| In addition to ship strikes, another cause of marine mammal injury and death is from exposure to high acoustic source levels (e.g., those encountered during Navy-sponsored Low Frequency Active (LFA) sonar tests). Irrespective of the method of mammal injury or death, the act of injuring or killing whales can and does result in litigation proceedings. This is a consequence of the legal protection that Cetaceans (whales and dolphins) are granted ... |
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| RF Polymer Phased Array Demonstration Project |
22 NOV 2004 |
70 pages |
| Authors:
H. Fetterman; W. Steier; L. Dalton; R. Chen; C. Cox; PACIFIC WAVE INDUSTRIES INC LOS ANGELESCA
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| This BMDO demo project was to demonstrate and to evaluate the latest generation of polymer modulators and devices for optical control of phased array radar antennas. Two commercial companies and three universities participated in this effort. Two versions of new phased array antenna designs were demonstrated in Texas on Sept 9, 2004. All of the objectives of the contract were achieved and summarized in this final report. The program involved ... |
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RADAR EQUIPMENT
