Results 231 to 240 of about 103,059 (283)
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Phase Retrieval for Radar Waveform Optimization
IEEE Transactions on Aerospace and Electronic Systems, 2012An important problem in radar waveform optimization is the synthesis of discrete time constant modulus signals from Fourier magnitude data. Iterative algorithms for solving this problem have been proposed in the literature, but the algorithms are only applicable in limited cases, and the convergent behavior of these algorithms has not been established.
Brian D Rigling
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A Novel Waveform Optimization Framework
IGARSS 2019 - 2019 IEEE International Geoscience and Remote Sensing Symposium, 2019It is well known that the nonlinear frequency modulation (NLFM) waveform with the advantage that it can shape the power spectral density (PSD) to provide a radar matched filter output with lower sidelobe without the loss of signal-to-noise ratio (SNR) when compared with the linear frequency modulation (LFM) waveform.
Guodong Jin +6 more
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Optimizing stimulus waveforms for electroceuticals
Biological Cybernetics, 2018There has been a growing interest in the use of electrical stimulation as a therapy across diverse medical conditions. Most electroceutical devices use simple waveforms, for example sinusoidal or rectangular biphasic pulses. Clinicians empirically tune the waveform parameters (e.g.
Joshua Chang, David Paydarfar
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Optimizing defibrillation waveforms for ICDs
Journal of Interventional Cardiac Electrophysiology, 2007While no simple electrical descriptor provides a good measure of defibrillation efficacy, the waveform parameters that most directly influence defibrillation are voltage and duration. Voltage is a critical parameter for defibrillation because its spatial derivative defines the electrical field that interacts with the heart. Similarly, waveform duration
Mark W, Kroll, Charles D, Swerdlow
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Waveform optimization for FDA Radar
2019 27th European Signal Processing Conference (EUSIPCO), 2019This paper addresses the problem of transmit signal design for target localization in a frequency diverse array (FDA) radar. For this purpose, we derive the Cramer-Rao bound (CRB) for target localization in FDA radar. The derived CRB is optimized with respect to the transmit signal parameters.
Nitsan Rubinshtein, Joseph Tabrikian
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Optimized gradient waveforms for spiral scanning
Magnetic Resonance in Medicine, 1995AbstractSpiral scanning gradient waveforms can be optimized with respect to blurring from off‐resonance effects by minimizing the readout time. This is achieved by maximizing the gradient amplitude during the scan so that the edge of k‐space is reached as quickly as possible. Gradient hardware constraints are incorporated by considering a circuit model
K F, King, T K, Foo, C R, Crawford
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Optimizing Defibrillation Through Improved Waveforms
Pacing and Clinical Electrophysiology, 1995Defibrillation of the heart is achieved if an electrical current depolarizes the majority of the unsynchronized fibrillating myocardial cells. The applied current or the corresponding voltage described as a function of time is called the waveform. In pacing, to stimulate myocardial cells close to the electrode, a relatively low voltage is needed for a ...
M, Block, G, Breithardt
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Waveform diversity and optimal change detection
2012 Conference Record of the Forty Sixth Asilomar Conference on Signals, Systems and Computers (ASILOMAR), 2012We study the problem of change detection for synthetic aperture radar (SAR) when the reference and mission images are the result of interrogation with different waveforms (waveform diversity). With waveform diversity, the problem of change detection becomes more challenging: The point spread functions of the reference and mission images are different ...
Carl W. Rossler +2 more
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Optimal recognition of neuronal waveforms
Biological Cybernetics, 1979Statistically optimal methods for identifying single unit activity in multiple unit recordings are discussed. These methods take into account both the nerve impulse waveforms and the firing patterns of the units. A generalized least-squares fit procedure is shown to be the optimal recognition scheme under some reasonable statistical assumptions, but ...
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