| MARSnet: Mission-aware Autonomous Radar Sensor Network for Future Combat Systems |
23-Mar-2009 |
169 pages |
| Authors:
Qilian Liang; TEXAS UNIV AT ARLINGTON DEPT OF ELECTRICAL ENGINEERING
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 | During the period of 7/1/2008 - 12/3 I/2008, we performed the following studies on radar sensor network and other related areas: I. Radar Sensor Network Using A New Triphase Coded Waveform: Theory and Application: 2 Sense-Through-Wall Channel Modeling Using UWB Noise Radar; 3. Orthogonal Pulse Compression Codes for MIMO Radar System; 4 Optimized Punctured ZCZ Sequence-pair Set: Design, Analysis and Application to Radar System; 5. A Triphase Coded Waveform: Design, ... |
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| Studies on Radar Sensor Networks |
08 AUG 2007 |
145 pages |
| Authors:
Qilian Liang; TEXAS UNIV AT ARLINGTON DEPT OF ELECTRICAL ENGINEERING
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| During the period of 12/8/2006-6/30/2007, we performed the following studies in radar sensor network: (1) Sense-through-foliage target detection using UWB radar sensor network based on real-world data; (2) Foliage clutter modeling using UWB radars; (3) Outdoor UWB channel modeling based on field data; (4) Multi-target detection using radar sensor networks (theoretical studies); (5) SVD-QR and graph theory for MIMO channel selection; (6) Image fusion using radar sensor network; (7) Performance ... |
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| Optical Add-Drop Filters Based on Photonic Crystal Ring Resonators |
19-Feb-2007 |
10 pages |
| Authors:
Zexuan Qiang; Weidong Zhou; Richard A Soref; TEXAS UNIV AT ARLINGTON DEPT OF ELECTRICAL ENGINEERING
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| We present here an optical add-drop filter (ADF) design based on ultra-compact photonic crystal ring resonators (PCRRs). The normalized transmission spectra for single-ring and dual-ring configurations have been investigated by using the two-dimensional finite-difference time-domain (FDTD) technique in a square lattice dielectric-rod photonic-crystal structure. With the introduction of four scatterers at the corners of quasisquare-ring PCRR, high wavelength selectivity and close to 100% drop efficiency can be obtained. Both backward- ... |
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| Studies on Radar and Non-radar Sensor Networks |
15 JUN 2006 |
141 pages |
| Authors:
Qilian Liang; TEXAS UNIV AT ARLINGTON DEPT OF ELECTRICAL ENGINEERING
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| During the period of 12/1/2005--5/30/2006, we expanded our research from generic wireless sensor networks to radar sensor networks. For radar sensor networks, we performed the following preliminary studies: (1) Waveform design and diversity in radar sensor networks with applications to automatic target recognition with or without delay-doppler uncertainty; (2) We proposed a Knowledge-based Ubiquitous and Persistent Sensor (KUPS) network for threat assessment, of which "sensor" is a broad characterization concept; ... |
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| Semiconductor YBACUO Uncooled Focal Plane Arrays |
30 MAR 2006 |
16 pages |
| Authors:
Donald Butler; Zeynep Celik-Bulter; TEXAS UNIV AT ARLINGTON DEPT OF ELECTRICAL ENGINEERING
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| The research has developed a readout circuit design, microbolometer designs, fabricated the readout circuits utilizing the - MOSIS foundry service, tested the readout circuits, integrated microbolometers onto the readout circuit and tested microbolometers fabricated on the readout circuits. The readout circuit was designed according to the MOSIS AMI 1.6 micrometers low noise analog CMOS design rules. The readout circuits were designed using capacitive transimpedance amplifiers (CTIA) and constant current buffered ... |
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| Energy Efficient Wireless Sensor Networks Using Fuzzy Logic |
09 DEC 2003 |
30 pages |
| Authors:
Qilian Liang; TEXAS UNIV AT ARLINGTON DEPT OF ELECTRICAL ENGINEERING
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| During the period 8/1/2003-11/30/2003, we have made lots of progress on energy efficiency of wireless sensor networks. We investigated the optimal number of clusters for a given number of sensors. Based on this theoretical result, we proposed a Fuzzy Energy Aware Topology Updated with REconfiguration for sensor-networks (FEATURES) scheme. This scheme provides a methodology on how to partition a sensor network to the desired number of clusters using fuzzy c- ... |
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| Effect of Cell Size on Elliptically Polarized Radar Clutter Statistics |
SEP 1994 |
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| Authors:
Adrian K. Fung; TEXAS UNIV AT ARLINGTON DEPT OF ELECTRICAL ENGINEERING
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 | In this final report, we summarize the approach used and relevant information for simulation of radar signal statistics from randomly rough surfaces. The total number of cases to be performed in this contract is 60 and is depicted in Table 1. Two sets of cases reported in the past are: (1) 30 cases for receiver orientation angles of 135 degrees, five azimuthal angles, three cell sizes with signal distributions expressed ... |
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| Magnetostatic Wave Transducers, Resonators and Dispersion Control |
MAY 90 |
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| Authors:
John M. Owens; Ronald L. Carter; W. A. Davis; Younes Ataiiyan; TEXAS UNIV AT ARLINGTON DEPT OF ELECTRICAL ENGINEERING
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| This report describes the design of magnetostatic surface waves (MSW) and transversal filters. A variable time delay device is described that uses a cascaded surface wave device and a backward volume wave device. Transducers composed of periodic arrays of shorted microstrip lines are described. Theoretical and experimental work has resulted in the first 'true' synthesized magnetostatic wave transversal filter. Furthermore, sample delay lines showed less than 16 dB insertion loss ... |
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| Simulation of Radar Scattering from Rough Surfaces |
03 JAN 90 |
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| Authors:
A. K. Fung; TEXAS UNIV AT ARLINGTON DEPT OF ELECTRICAL ENGINEERING
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| The project established computer simulation as a tool for studying scattering from randomly rough surfaces. The proposed methods to be investigated included the standard moment method and the integral equation method (IEM). The minimum size was investigated for the surface patch necessary to obtain the scattering cross section per unit area, which should be the same as obtained from an infinite surface patch when the method used was the standard ... |
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| Tunable Microwave Transversal Filters and Dispersive Delay Lines Based on Oblique Incidence Reflection of Magnetostatic Wave Propagating in Epitaxial Garnets |
30 SEP 86 |
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| Authors:
J. M. Owens; R. L. Carter; TEXAS UNIV AT ARLINGTON DEPT OF ELECTRICAL ENGINEERING
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| The report summarizes work to date toward a goal of establishing novel microwave analog signal processing using oblique reflection of magnetostatic waves propagating in epitaxial YIG. Also, investigation has been carried out on the realization of MM wave isolators based on field displacement in dielectric waveguides formed from an epitaxial YIG system. Keywords include: Magnetostatic Waves, Millimeter Wave Isolators, and Microwave Analog Signal Processing. |
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| Tunable Microwave Transversal Filters |
01 MAY 1984 |
213 pages |
| Authors:
J. M. Owens; R. L. Carter; TEXAS UNIV AT ARLINGTON DEPT OF ELECTRICAL ENGINEERING
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| This final report for the third year of contract AFOSR-80-0264 summarizes the results of a fundamental investigation of a viable technological realization of this goal through magnetostatic waves MSW propagating at microwave frequency in magnetically biased, liquid phase epitaxial films of yttrium iron garnet (YIG) grown on gadolinium gallium garnet (GGG). This technology has a number of advantages; low loss (greater than 30db/usec at xband), tunable by bias field to ... |
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| Microwave Pulse Compression Loops Using Magnetostatic Wave Delay Lines, |
JAN 1983 |
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| Authors:
Charles V. Smith Jr.; John M. Owens; R. L. Carter; K. W. Reed; TEXAS UNIV AT ARLINGTON DEPT OF ELECTRICAL ENGINEERING
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| Pulse compression systems utilizing surface acoustic wave (SAW) devices have been under intensive investigation for the past 10 years. These studies have concentrated primarily on linear chirps and the achievement of low time-sidelobes by appropriate amplitude weighting. Both active and passive generation have been utilized in the compression loops, and time-bandwidth products over 1000 with greater than 40 dB sidelobe suppression have been obtained. An experimental pulse compression loop has ... |
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| The Status of Magnetostatic Wave Oscillators, |
1983 |
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| Authors:
R. L. Carter; J. M. Owens; TEXAS UNIV AT ARLINGTON DEPT OF ELECTRICAL ENGINEERING
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| The continual demand for increased performance in modern communication and radar systems in terms of increased bandwidths and higher operating frequencies has led to investigation of novel techniques and technologies for analog signal processing. In particular, surface acoustic waves (SAW) have been extensively exploited with great success to this end, but systems requiring center frequencies greater than 1 GHz have pushed SAW devices nearly the practical physical limit of the ... |
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Reports by Corporate Author
