Essays about: "Wigner distribution"

Showing result 1 - 5 of 9 essays containing the words Wigner distribution.

  1. 1. Evaluation of algorithms for accurate micro-doppler effects measurement in FMCW radar

    University essay from Linköpings universitet/Fysik, elektroteknik och matematik; Linköpings universitet/Tekniska fakulteten

    Author : Morgan Agerstig Rosenqvist; [2023]
    Keywords : Radar; FMCW; micro-Doppler; RPM;

    Abstract : Micro-Doppler effects are phenomena that occur because of micro-motion. A micro-motion is either a vibration, rotation, or acceleration which is small relative to the motion of the target. These effects can be used in order to characterize a target through their signature movement. READ MORE

  3. 2. Optimal Multitaper Spectrograms

    University essay from Lunds universitet/Matematisk statistik

    Author : Markus Ydreskog; [2023]
    Keywords : Time-frequency analysis; Multitaper spectrogram; Optimization; Wigner distribution; Mathematics and Statistics;

    Abstract : Multitaper spectrograms have been proposed as a method of improving the spectrogram as a time-frequency representation (TFR). This thesis aimed to investigate both previously used and new methods for combining multitaper spectrograms of a Gaussian signal and a chirp. READ MORE

  4. 3. Random Matrix Models

    University essay from Uppsala universitet/Teoretisk fysik

    Author : Evangelos Tsolakidis; [2022]
    Keywords : Random Variables; Matrix Models; Graph Theory; Bootstrap;

    Abstract : In this thesis, we provide a self contained introduction to the theory of random matrices and matrix models. Our analysis has a chronological order and it begins with the study of nuclear energy levels and ensemble averaging which yields the famous Wigner surmise. READ MORE

  5. 4. Parameter Estimation of LPI Radar in Noisy Environments using Convolutional Neural Networks

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Filip Appelgren; [2021]
    Keywords : Deep Learning; LPI; Radar; CNN; Parameter estimation; Djupinlärning; LPI; Radar; Faltningsnätverk; Parameterestimering;

    Abstract : Low-probability-of-intercept (LPI) radars are notoriously difficult for electronic support receivers to detect and identify due to their changing radar parameters and low power. Previous work has been done to create autonomous methods that can estimate the parameters of some LPI radar signals, utilizing methods outside of Deep Learning. READ MORE

  6. 5. LPI waveforms for AESA radar

    University essay from Uppsala universitet/Fasta tillståndets elektronik

    Author : Andreas Sjöberg; [2020]
    Keywords : Radar LPI waveform AESA;

    Abstract : The purpose of low probability of intercept (LPI) radar is, on top of the standard requirements on a radar, to remain undetected by hostile electronic warfare (EW) systems. This can be achieved primarily by reducing the amount of radiated power in any given direction at all times and is done by transmitting longer modulated pulses that can then be compressed digitally in order to retain range resolution. READ MORE