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 22 for “"CFAR"”.
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Ultra-Wideband Radar Based Human Motion Analysis
… (MTI) and constant false alarm rate detection (CFAR). A new CFAR detection technique is proposed, namely the out-of-band (OB) CFAR detection. In the field experiment, two RF reflective markers are attached to the wrist and elbow of one human arm for reflecting radar signals. It is demonstrated …
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Development of a ML Algorithm to Improve Radar Detection of Golf Balls Using MFCW Radar
… This thesis compares Constant False Alarm Rate (CFAR) detectors (including CA-, OS-, VI-, TM-, CHA- and WAI-CFAR) against modern Machine Learning (ML) techniques, including multinomial and binary Logistic Regression (LR) and Gradient Boosted Tree classifiers (XGBoost). For the ML models, a bin …
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Optimal and Suboptimal Signal Detection-On the Relationship Between Estimation and Detection Theory
… relationship between Constant False Alarm Rate (CFAR) and invariant tests. We generally show that for a family of distributions, the unknown parameters are eliminated from the distribution of the maximal invariant statistic under the Minimal Invariant Group (MIG) while the maximum information of …
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Sparsity based methods for target localization in multi-sensor radar
… number of targets. A constant false alarm rate (CFAR) sparsity based detector that does not utilize any information on the number of targets referred to as MP-CFAR and MBMP-CFAR are also developed. A performance analysis for the new CFAR detector is also derived, the metrics used to describe the …
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Adapting a community first aid responder programme to increase out-of-hospital capacity in Kinshasa, Democratic Republic of Congo
… WHO developed the Community First Aid Response (CFAR) training program to support this approach. For the course to be appropriately and sustainably implemented, contextual adaptations are necessary. The prerequisites for this country-specific adaptation include, among other factors, a systematic …
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Vision-Enhanced Communications: On the Benefits of NLOS/LOS Knowledge in Wireless Systems
… decision rule in both constant false-alarm rate (CFAR) and minimum probability of error (min(Pe)) paradigms. It is shown that a dynamic detection scheme utilizing labeled information, including imperfect error-prone labels, sourced from vision sensors can improve upon the uniformly-most-powerful …
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Contemporary Approaches to Radar Detection: Robust Statistics, Reinforcement Learning, and Reconfigurable Intelligent Surfaces
… however, typically, constant false alarm rate (CFAR) radar detection either requires a priori knowledge of noise and clutter distributions or the collection of secondary data. We solve these issues by leveraging detection techniques developed for the massive MIMO (MMIMO) regime for CFAR …
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An examination of bond rating, beta and value-at-risk as financial risk measures.
… worst possible earnings (EaR) and cash flows (CFaR) that a company has to manage. A bond rating downgrade implies that a company may have a lower profit-making capability in the future. It is assigned only if a company has significantly changed its financial credibility. Therefore, its …
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A model for cash management : an aquaculture case study
… risk in asset portfolios. Cash-flow-at-Risk (CFaR) has been considered the VaR alternative for non-financial firms, by quantifying the potential loss in earnings from operations. In this thesis, the CFaR is implemented in the network flow model to determine the minimum level of available cash …
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Ultrawideband Indoor Location And Tracking System
… data compression and Constant False Alarm Rate (CFAR) techniques to improve the performance of the location system. Reliable and accurate indoor positioning requires a local replacement for GPS systems since satellite signals are not available indoors. UWB systems are particularly suitable for …
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Software Infrastructure for NeXtRAD Development in Julia Programming Language
… LMS filter was validated by applying an OS-CFAR detector to match filtered data before and after filtering. The filter was unable to improve the precision or recall for highly cluttered pulses, but was able to reduce the number of highly cluttered pulses.
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Software-defined pulse-doppler radar signal processing on graphics processors
… envelope (ENV) and constant false-alarm rate (CFAR) processing functions were then implemented and optimized for the GPU architecture. Multiple algorithmic variants were implemented, where appropriate, to evaluate the efficiency of different algorithmic structures on the GPU architecture. These …
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Categorization of electromagnetic radiation scatterers by means of synthetic aperture radar (SAR) images
… a scene is assessed. Furthermore, a novel CFAR ship detector that exploits the scattering mechanism of a scatterer instead of its amplitude information is developed. Ships are depicted by pixels that present strong echoes on a background with relatively low backscattering power formed by …
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Contribución a la detección no paramétrica de la señal radar con clutter no gaussiano
… con relación de falsa alarma constante (CFAR) si las muestras de clutter son IID. El estadístico óptimo para el detector paramétrico es también óptimo para el detector de permutaciones. Las pérdidas de detectabilidad de un detector óptimo de permutaciones con respecto al detector …
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Micro-doppler classification of humans and animals using FMCW radar
… range-Doppler and Constant False Alarm Rate (CFAR) maps for detection and using Short-Time Fourier Transform (STFT) for spectrogram generation were applied. Principal Component Analysis (PCA) was employed as the method for data reduction. The dataset was subsequently classified and evaluated …
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Multichannel Sense and Avoid Radar for Small UAVs
… algorithm and a constant false alarm rate (CFAR) detector. Tracking of the target was performed using the range-Doppler relationship of targets in the resulting radar image. The target’s angular information in the form of target echo angle of arrival (AoA, needed for location estimation) was …
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An adaptive threshold energy detection technique with noise variance estimation for cognitive radio sensor networks
… We also employ the constant false alarm rate (CFAR) threshold to act as a defence mechanism against interference of the primary user at low signal to noise ratio (SNR). Our evaluations indicate that our adaptive threshold technique achieves double dynamicity of the threshold value based on the …
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Study of the TR Synchronization and Video Conversion Unit
… The output of the SVCU was then processed by a CFAR detector and gated tracking algorithms implemented in MathLang and Python. The simulated target was correctly identified in the range-Doppler plane. The tracking gates (used to measure range and Doppler) were then corrupted with jitter, rise- …
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Some contributions on MIMO radar
… illustrated and the constant false alarm rate (CFAR) property of adaptive MIMO moving target detectors is demonstrated. Finally, the high resolution capabilities of MIMO radar are explored. As noted above, the several individual scatterers constituting a target result in its fluctuating RCS. The …
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Beamforming and scan pattern performance evaluation of rotating maritime multi-beam phased array surveillance radar
… cell averaging constant false alarm rate (CA-CFAR) detection provided better results in a homogeneous and small target signal-to-clutter ratio (SCR) environment (as was the case at far ranges). The detection probability was 1 and false alarm probability was 0.03. In a spiky and large target …
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