Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 21 for “"radar applications"”.
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Wearable antennas for new radar applications
… tesis, se han diseñado antenas para un sistema radar de ayuda invidentes, operativo en la banda de frecuencias milimétricas de uso libre de 24.05-24.25 GHz. Con el fin de determinar el patrón de radiación óptimo para la aplicación, se ha comparado el rendimiento de diversas antenas para la …
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Printed log-periodic feeds for radar applications
Radar systems are well known since the end of world war II and are widespread. The basic concept of radar is relatively simple: the system uses the propagation characteristics of electromagnetic waves and works by radiating electromagnetic energy in the space and detecting the echo reflected by the …
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Cloud-aided wireless systems: communications and radar applications
… and Cloud Radio Access Network (C-RAN), and for radar systems. This dissertation first concentrates on cloud-aided communications. Mobile cloud computing, which allows mobile users to run computationally heavy applications on battery limited devices, such as cell phones, is considered initially. …
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Multi-baseline interferometric synthetic aperture radar applications and error analysis
… configuration utilizing three satellites. Two applications of InSAR, multi-baseline height retrieval and multi-baseline compensation of CCD's slope biasing effects, are first examined in details. An optimal baseline-weighted height averaging technique is introduced. Phase averaging, a novel …
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Nearly orthogonal, doppler tolerant waveforms and signal processing for multi-mode radar applications
… tolerant waveforms for diversity waveform radar applications. We then present a signal processing framework for joint synthetic aperture radar (SAR) and ground moving target indication (GMTI) processing that is built upon our proposed waveforms. ^ To design nearly orthogonal and Doppler …
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3D Micromachined Passive Components and Active Circuit Integration for Millimeter-wave Radar Applications
… back almost six decades. In particular, mm-wave radars have applications as automotive radars, in remote atmospheric sensing applications, as landing radars for air and spacecraft, and for high precision imaging applications. Mm-wave radar systems have high angular accuracy and range resolution, …
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Design of an Ultra-Wideband Spiral Antenna for Ground-Penetrating Microwave Impulse Radar Applications
<p>Radar systems that allow early detection of underground IEDs can save lives. The Microwave Impulse Radar (MIR) capable of IED detection requires antennas capable of transmitting sub-nanosecond pulses over ultra-wideband (UWB) frequency ranges. This thesis investigates the suitability of a novel …
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Contributions towards a coherent chaotic oscillator at 100MHz and 70 GHz antennas for automotive radar applications.
This Master's thesis focuses on the design of a coherent chaotic oscillator working at a base frequency of 100MHz, and the design of an array of patches operating in the frequency range of 71-76 GHz. The array will be used to transmit the chaotic signal after it is up-converted. The requirements of …
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Design, analysis, application and experimental assessment of algorithms for the synthesis of maximally sparse, planar, non-superdirective and steerable arrays
… the choice of such topic is related to those applications wherein the power supply/consumption, the weight and the hardware/software complexity of the whole radiating system have a strong impact on the overall cost. On the other hand, the reduction of the number of elements has of course …
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Low-complexity convolutional neural networks for automatic target recognition
… recognition systems based on synthetic aperture radar imagery. Recently, with the rise of Deep Learning, there has been growing interest in developing neural network based automatic target recognition systems for synthetic aperture radar applications. However, these networks are typically complex …
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Implementation of the Transmitting Functionality on the TIGER-3 FPGA-based Transceiver Platform
… are commonly used in long-range communication applications or in radars that require long-range detection capabilities. This is due to the refraction of HF radio waves, where the transmitted wave bends back towards to the Earth. HF radio waves can therefore be used to detect ships that are …
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Ray- and Wave-Theoretic Approach to Electromagnetic Scattering from Radially Inhomogeneous Spheres and Cylinders
<p>With applications in the areas of chemistry, physics, microbiology, meteorology, radar, astronomy, and many other fields, electromagnetic scattering is an important area of research. Many everyday phenomena that we experience are a result of the scattering of electromagnetic and acoustic waves. …
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Quasi-orthogonal wideband radar waveforms based on chaotic systems
… feasible to use arbitrary, wideband waveforms in radar applications. Large sets of quasi-orthogonal, wideband waveforms can be generated so that multiple radars can simultaneously operate in the same frequency band. Each individual radar receiver can process its own return as well as the …
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Multifunction Radio Frequency System Design Using Nonlinear Models
… and tested. The transceiver was designed for radar applications operating at X-band (8 to 12 GHz) and is wideband, thereby providing the designer with a wide wireless window through which they can simultaneously transmit and receive multiple signals. The system is constructed entirely using …
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Low Latency Compressive Sensing using Multi-Resolution Analysis In Radar Signal Processing
… Nyquist rate. Our focus is studying CS and its applications to radar. We study different successful CS practical implementation approaches. However, these approaches lead to an undesired high-latency in the computation and signal reconstruction.This thesis has four main contributions that build …
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Dynamic Hand Gesture Recognition Using Ultrasonic Sonar Sensors and Deep Learning
The space of hand gesture recognition using radar and sonar is dominated mostly by radar applications. In addition, the machine learning algorithms used by these systems are typically based on convolutional neural networks with some applications exploring the use of long short term memory networks. …
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On particle filters in radar target tracking
… and evaluation of particle filters for radar target track filtering of a maneuvering target, through quantitative simulations and analysis thereof. Target track filtering, also called target track smoothing, aims to minimize the error between a radar target's predicted and actual …
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Detecting and locating electronic devices using their unintended electromagnetic emissions
… radio receivers. The second section develops a radar-like technique for accurately locating radio receivers. The radar utilizes the stimulated emissions technique with wideband signals. A radar-like system is designed and implemented in hardware. Its accuracy tested in a noisy, multipath-rich, …
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Generalized DFT: extensions in communications
… in order to deliver better performance. For MIMO Radar systems, the ideal case to detect a moving target is when all waveforms are orthogonal, which can provide an accurate estimation. But this is not practical in distributed MIMO radars, where sensors are at varying distances from a target. …
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GSM based Communication-Sensor (CommSense) System
Using communication signals for radar applications has been a major area of research in radar engineering. In the recent years, due to the widely available wireless signals, a new area of research called commensal radars has emerged. Commensal radars use available wireless Radio Frequency (RF) …
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