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 15 of 15 for “"constant false alarm"”.
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Ultrawideband Indoor Location And Tracking System
… (UWB) technology and use 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 …
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Ultra-Wideband Radar Based Human Motion Analysis
… achieved by moving target indication (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 …
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Vision-Enhanced Communications: On the Benefits of NLOS/LOS Knowledge in Wireless Systems
… used to derive the optimal 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 …
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Development of a ML Algorithm to Improve Radar Detection of Golf Balls Using MFCW Radar
… detection algorithms. 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). …
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Micro-doppler classification of humans and animals using FMCW radar
… techniques such as creating 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 …
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Sparsity based methods for target localization in multi-sensor radar
… large sidelobes which may lead to an increased false alarm probability. The number of sensors of a MIMO random array required to maintain a certain level of peak sidelobes is studied. It is shown that the number of sensors scales with the logarithm of the array aperture, in contrast with a ULA …
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Multichannel Sense and Avoid Radar for Small UAVs
… using a 2-D FFT processing 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 …
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An adaptive threshold energy detection technique with noise variance estimation for cognitive radio sensor networks
… based on the noise variance. 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 …
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Optimal and Suboptimal Signal Detection-On the Relationship Between Estimation and Detection Theory
… second part, we study the 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 …
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Contemporary Approaches to Radar Detection: Robust Statistics, Reinforcement Learning, and Reconfigurable Intelligent Surfaces
… for dynamic environments; 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 …
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Some contributions on MIMO radar
… several transmitters is 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 …
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Beamforming and scan pattern performance evaluation of rotating maritime multi-beam phased array surveillance radar
… detected with a detection probability of 1 and a false alarm probability of 0. This could be achieved with a single or dual-axis stacked beam. In a single axis stacked beam, only non-coherent integration of low quantity, low PRF pulse bursts could be used for the surface channel as time resources …
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The Design of a Low-Cost Traffic Calming Radar - Development of a radar solution intended to demonstrate proof of concept
… to 40 meters from the radar. The cell-averaging constant false alarm rate (CA-CFAR) detector was chosen as an optimum detector for this application, and parameters that produced the best results were found to be 50 reference cells and 12 guard cells. The detection rate was found to be 100% for …
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Software-defined pulse-doppler radar signal processing on graphics processors
… (CT), Doppler filtering (DF), 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 …
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Channel Probing for an Indoor Wireless Communications Channel
The statistics of the amplitude, time and angle of arrival of multipaths in an indoor environment are all necessary components of multipath models used to simulate the performance of spatial diversity in receive antenna configurations. The model presented by Saleh and Valenzuela, was added to by …