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 37 for “"fmcw"”.
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FMCW RFID backscatter localization
Due to applications in supply chain management, virtual reality, and asset tracking, there has been an increasing interest in accurate localization and motion tracking using radio-frequency identification (RFID) tags. In this thesis, we explore a one-shot radio-frequency identification based …
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An ultra high resolution FMCW radar
… Linear frequency-modulated continuous-wave (FMCW) radar was utilized, since a pulsed radar would require very precise time measurements due to the short range (a few ns). The FMCW radar would have to be very linear for the modelling process to work properly. The frequency domain measurement …
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Extending the range of low SWaP-C FMCW radar
This thesis develops, analyzes, and tests a method to adapt low-cost, automotive-grade radar chipsets for long-range sensing. These disruptive chipsets offer impressive performance at low size, weight, power, and cost (SWaP-C) that could benefit applications with tight SWaP-C budgets such as urban …
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Time-Offset Fractional-N PLLs for Heterodyne FMCW SAR
… heterodyne frequency-modulated continuous-wave (FMCW) synthetic aperture radar (SAR) and the impact of spurii on such a system. Heterodyne receiver architectures avoid phenomena which limit the sensitivity of their homodyne counterparts, and enable certain inter-antenna feed-through suppression …
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Fractional-N PLL-Based Waveform Synthesis for FMCW SAR
… of a frequency modulated continuous wave (FMCW) synthetic aperture radar (SAR) system, named the miloSAR, by improving the frequency synthesis aspects of the system. This is done by considering the phase-locked loop (PLL) synthesiser employed and waveforms, thereof, in terms of dynamic …
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Application of the FMCW method to quasi-distributed absorption sensors
… on the frequency modulated continuous wave (FMCW) method. The sensor units consist of open-path micro-optic cells constructed from GRIN lenses, each of differing lengths. Guided by initial simulations, two approaches are experimentally investigated and evaluated, namely reference arm …
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Micro-doppler classification of humans and animals using FMCW radar
… by a Frequency-Modulated Continuous Wave (FMCW) radar. Raw Analogue to Digital Converter (ADC) data was collected of human and animal species including dogs, horses and cows. Signal processing techniques such as creating range-Doppler and Constant False Alarm Rate (CFAR) maps for detection …
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Design and implementation of a low-cost FMCW imaging radar
… prototype. The RadioCamera-S is the S-band FMCW radar, that was developed to test the architecture that could be utilised to enable the filtering of the feed-through and nadir components, which are typically the strongest returns in the spectrum. The prototype has two modes of operation that …
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Development and Optimization of Airborne FMCW Radars for High-Resolution Snow Depth Measurements
… research is to design, develop, and optimize UWB FMCW (Frequency-Modulated Continuous-Wave) radar systems for airborne snow measurements to generate data products in near-real-time for operational applications. We need to address a few significant engineering challenges to do this. The first is to …
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Platform and Pipeline Development for a FMCW Radar System for Vital Sign Detection
Frequency Modulated Continuous Wave (FMCW) Radar has become a frequently examined technology for the purposes of ubiquitous vital sign monitoring applications. Vital sign monitoring of heart rate and respiration rate is important because it gives key physiological insights into the health of …
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The Development of an Independent Frequency Modulated Continuous Wave Radar for Perimeter Security
… of Frequency Modulated Continuous Wave (FMCW) radars has provided several diverse industries with a microwave sensor that can be utilized reliably for many different applications. The research specified in this thesis focuses primarily on the perimeter security industry with the …
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Frequency-modulated continuous-wave radar processing fundamentals
… using a frequency-modulated continuous-wave (FMCW) radar. FMCW radars have applications such as collision detection and assisted cruise control in modern vehicles, due to their ability to be manufactured as low-power, single-chip systems. We will discuss the use of a two-dimensional fast …
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Reflectarray Antenna based FMCW Radar System Development: High Isolation Radar Antenna Design and Feasibility of Affordable Switched-Beam for the UAV Detection
This study aims to develop anti-drone applications. It is clear that radar is one of the most promising anti-drone detectors, as they are not significantly dependent on weather or light conditions. The cost of current anti-drone radars is extremelyhigh, thus there is a need for cost-effective …
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Frequency Modulated Continuous Wave Radar Based Fall Risk Monitoring System
… using a frequency-modulated continuous-wave (FMCW) radar system, addressing the need for frequent, low-cost, longterm balance monitoring solutions. This technology is compared with ground-truth contactbased lab sensors like force plates and motion capture systems, establishing a foundation for …
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Implementation of Range Autofocus for SAR Radar Imaging
<p>The range calculation for an FMCW radar depends on accurate linear modulation. In some circumstances, linear modulation may not be available and must be corrected for. This paper describes an autofocus technique used to correct for phase error due to non-linearities in the components of a FMCW …
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A Frequency-Modulated Continuous Wave-Based Boundary Detection System for Determination of Monitoring Region for an Indoor Ultra-Wideband Short Range Radar-Based Eldercare Monitoring System
… <p>A frequency modulated continuous wave (FMCW) based system is an acceptable solution for boundary detection. A FMCW system measures distance with UWB signals. With the addition of a unique reflector, the system is able to identify the reflector via the return frequency-spectrum …
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A Frequency-Modulated Continuous Wave-Based Boundary Detection System in a Small PCB Profile
… that a frequency modulated continuous wave (FMCW) based system is an acceptable solution for boundary detection. A FMCW system can measure distance with less than 10cm accuracy if the chosen spectrum bandwidth is 1GHz or more. This thesis presents the design of a low cost approach to small …
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One millimeter for man, one meter for mankind: establishing millimeter wave radar as a ubiquitous sensor in consumer applications
… frequency-modulated continuous-wave (FMCW) radars are not used to their fullest potential. Classical, hand-designed target detection algorithms are applied in the signal processing chain and the rich contextual information is discarded. This early discarding of information limits what …
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Path Following using Frequency Modulated Continuous Wave millimetre-wave Automotive Radar
… to only use Frequency Modulated Continuous Wave (FMCW) radar. Radar has shown to be semi-invariant to inclement weather such as snow, fog, extremely lighting conditions, and heavy rain. Traditionally, autonomous vehicle (AV) path planning algorithms use multiple introceptive and exteroceptive …
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Nuevas técnicas para sensores radar embarcados en vehículos aéreos no tripulados
… radar de onda continua y frecuencia modulada (FMCW) operando en la banda de milimétricas, debido a que representan una opción muy atractiva para ser embarcada en UAVs. En este capítulo también se describe el sistema SEIISM, un radar FMCW en milimétricas que ha sido desarrollado para validar …
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