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 45 for “"doppler radar"”.
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Monitoring Breathing Using a Doppler Radar
… monitoring the vital signs of inmates in Canada. Doppler radar has been previously investigated as a potential method of vital signs detection and monitoring. This thesis presents an algorithm which uses the baseband output signal received by a Doppler radar to estimate the breathing rate from the …
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Doppler radar observations of an Oklahoma downburst
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Meteorology and Physical Oceanography, 1983.
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Compact Doppler radar system for heart rate detection
… activity, can be measured with a microwave Doppler radar system. This thesis focuses on the assessment of radio system requirements and critical specifications for such radar sensing systems. The fundamental limitations for transmit power, receive power and range for a functional 2.40Hz IMS …
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A comparison of Chirp Diversity and Pulse Doppler Radar
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1994.
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A clutter power computation procedure for airborne Doppler radar
… average clutter power received by an airborne Doppler radar as a function of time and frequency. Its purpose is to construct the received power waveform at the output of a matched filter for use in the development of clutter maps related to Doppler signal processing. In developing the …
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Software-defined pulse-doppler radar signal processing on graphics processors
Modern pulse-Doppler radars use digital receivers with high speed ADCs and sophisticated radar signal processors that necessitate high data rates, computationally intensive processing, and strict latency requirements. Data-independent processing is performed as the first stage and requires the …
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A Doppler Radar Lock-in Demodulation Algorithm for Machine Vibration Sensing
… diagnose potential problems in machines. Doppler radar can be used as a sensor that provides non-contact, inexpensive real-time data collection without necessitating line-down time. Conventional Fast Fourier Transformation based vibration analysis requires large amounts of data to achieve …
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Integration and testing of a digital transceiver for a dual frequency, pulse-doppler radar
… transceiver system for a dual-band, polarimetric radar, which is to form part of the NeXtRAD multistatic radar. NeXtRAD is being developed as an instrument for research into the behaviour of clutter and targets as observed by multistatic radars. The Pentek Cobalt model 71621 software defined radio …
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Low-level curvature shear and supercell thunderstorm behavior
… important in responding to this challenge is Doppler radar which is used to detect rotation over several kilometers within thunderstorms in a region known as the mesocyclone. Preliminary studies indicate the use of Doppler radar to issue tornado warnings based on mid-level mesocyclones yields …
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Anti-jamming MTI radar using variable pulse-codes
A pulsed Doppler radar is vulnerable to advanced repeat-back jamming techniques. Rapidly advancing technology producing inexpensive, high performance commercial off-the-shelf (COTS) components enable the construction of an electronic countermeasure (ECM) system capable of exploiting this …
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A numerical simulation of a tornado-scale vortex in a three-dimensional cloud model
… network of surface stations, conventional radar, Doppler radar and satellites. Therefore direct observations of tornadoes and their parent features are rarely obtained. Consequently, understanding of these phenomena will generally have to come from theoretical work, laboratory experiments, …
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Analyses of quasi-linear convective system tornado characteristics, environments, and genesis mechanisms
… and their supporting environments. A combined Doppler radar, tornado report, and environment dataset was compiled for this purpose. Lastly, this research aimed to quantify National Weather Service (NWS) warning performance for both mechanisms. From a strict consideration of only the first …
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Behavior modeling of RF systems with VHDL
… the I/O response of these systems. A Pulsed Doppler radar system is chosen as a representative system, and a VHDL model for this system is presented. The modeling approach and the working of the model are explained, and some example runs are provided. Some problems that are posed by VHDL in …
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X-band Doppler simulator for sport projectile radars
… time. This is a common problem with evaluating Doppler radars as well, since the inherent property of a Doppler radar is to measure the radial velocity of objects in motion like aircraft or projectiles. A common solution to this problem is to perform a hardware- in-the-loop (HIL) simulation. …
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SH-3 helicopter/global positioning system integration analysis
… is the optimum configuration. Elimination of the doppler radar in lieu of the five channel receiver would only be possible after thorough over-water testing of the high dynamic set. The actual velocity accuracy of GPS receivers in a hovering helicopter is the main question yet to be answered. The …
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Radar Detection, Tracking and Identification for UAV Sense and Avoid Applications
… targets by enabling rapid prototyping of novel radar techniques such as micro-Doppler radar target identification or cognitive radar. To enable empirical radar signal processing evaluations, an S-Band and X-Band frequency modulated, software-defined radar testbed is designed, implemented, and …
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Integrating Multi-Source Weather Data for Deep Learning
… Data sources include Next-Generation NEXRAD [3] Doppler radar reflectivity, GOES-16 [4] multi-channel satellite imagery and NCEI [1] storm events. Then, it integrates and refines data in proper formats to be fed to the open-source Detectron [5] Deep learning software package from Facebook. The …
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Raindrop Size Distribution Retrieval And Evaluation Using An S-band Radar Profiler
Vertical pointing Doppler radar profilers are used to explore the vertical structure of precipitation cloud systems and to provide validation information for use in weather research. In this thesis, a theoretical radar rain-backscatter model was developed to simulate profiler Doppler spectra as a …
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