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 20 for “"band-pass filter"”.
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Noise analyzer--band-pass filter of variable width and mean frequency
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering, 1941.
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Design multilayer bandpass filter using hairpin resonator for digital broadcasting
This research presents 2.52-2.65 GHz band-pass filter using multilayer hairpin resonator for digital broadcasting applications . Four-pole resonators are centered at 2.58 GHz with bandwidth of 130 MHz .This filter is simulated using Computer Simulation Technology software (CST) and Advance Design …
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Filter Design for Interference Cancellation for Wide and Narrow Band RF Systems
In radio frequency (RF), filtering is an essential part of RF transceivers. They are employed for different purposes of band selection, channel selection, interference cancellation, image rejection, etc. These are all translated in selecting the wanted signal while mitigating the rest. This can be …
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Tunable Filters and Interference Rejection System for Interferer Suppression at RF and Microwave Bands
… or cognitive radios which access a wideband or multiband spectrum dynamically. It is desirable for the wireless systems to have high frequency selectivity early in the receiver chain at RF to relax the dynamic range requirements of subsequent stages. However, integration of high …
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Control and monitoring of an intra-aortic balloon pump for cardiac assist
… Intra-Aortic Balloon Pump is described. A narrow band-pass filter is used to reduce noise and limit the input to the detector to the spectrum within which the R-wave of an ECG signal lies. A safety circuit to prevent the heart pumping against an inflated balloon is incorporated. History of the 8 …
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Hand and elbow gesture recognition based on electromyography signal
… is presented using a 6th order Butterworth band pass filter, low and high pass filter with normalization. Furthermore, the features are evaluated using Variance (VAR), Standard Deviation (SD) and Root Mean Square (RMS) to test the significance of the features. Nevertheless, the K-Nearest …
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State space models for isolating neural oscillations
… these electrical potentials is to apply a band pass filter in the frequency band of interest. Canonical frequency bands have been defined and applied in many previous studies, but their specific definitions vary within the field, and are to some degree arbitrary. We propose an alternative …
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Habituation of the Goldfish Vestibulo-Ocular Reflex Is Frequency Specific and Nonlinear: An Experimental and Modeling Study
… decreased the time constant of the VOR high-pass filter model to simulate habituation, suggesting that habituation is a general phenomena. The present experiments in goldfish show that habituation is both nonlinear and nonstationary and is quite effective at low-frequencies. Habituation is …
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Design of, and initial experiments with, a MIMO plate control testbed
… The sixteen-channel design implements a band-pass filter to eliminate low- and high-frequency noise. The power amplification scheme chosen for the actuators uses low-gain amplifiers (~2.5 V/V) in series with a transformer (24:1) to deliver high voltages (up to 150 V) to the actuators. …
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MICROWAVE ACTIVE INDUCTOR ANALYSIS AND DESIGN
… to achieve a better quality factor, more broadband and higher value inductance. The conventional passive inductor has an intrinsic resistance and a stray capacitance, which will severely affect its quality factor and available frequency band in the circuit design. In this project, some novel …
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An investigation of wave-induced momentum flux through phase averaging of open ocean wind and wave fields
… by the most monochromatic-like waves present and filtering those sections of wind data with a narrow band-pass filter centered around the dominant wave frequency before beginning the phase averaging process. The analysis is carried a step further by investigating the dependence of wave-induced …
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A computational tool for microstrip planar filter design
Filters are very important part of any communication system. Naturally, RF and microwave systems belong to these systems. Microwave filters are needed in a wide range of applications including satellite communications and wireless communications as well as military applications. Planar filters …
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The plasticity of the human perceptual systems in processing auditory- and spatial-frequencies
… of independent channels, each functioning as a band-pass filter centred around a specific spatial-frequency and thus tuned to a sinusoidal pattern of that frequency. The main property to be determined for each selective channel is its width on the spatial-frequency axis. This has been done by …
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Integrated realizations of reconfigurable low pass and band pass filters for wide band multi-mode receivers
… importance belongs to the reconfigurable filters that are responsible for the selectivity of the system. The problematic of filtering is strictly connected to the architecture chosen for a multi-mode receiver realization. According to the chosen architecture, the filters can exhibit low …
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Study of Multiple ASE-Noise Effects and A Filtering Solution For Soliton Propagation Through Optical Fibers
… to acceptable levels far beyond that of non-filtered systems. An approach implementing a modification to the sliding-frequency filter method has demonstrated a great potential towards separating the noise components in a soliton transmission system. Previous experiments included the use of an …
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Strategies for Removing Non-stationary Effects in Machine Diagnostics using Model-driven and Artificial Intelligence Techniques
… dynamic time warping (FDTW) to optimally align a filtered shaft vibration signal and a simple sinusoidal reference signal of constant frequency to resample the measured vibration signal to the order domain by using the points of the optimal warping path. As the reference signal is built using a …
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Accurate Small-Signal Modeling for Resonant Converters
… the underlying assumption based on the use of a band-pass filter for the resonant tank in conjunction with a low-pass output filter, which is not the case for most practical applications. The matter is further complicated by the presence of a rectifier, which is a nonlinearity that mixes and …
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Power electronics implementation of dynamic thermal storage as effective inertia in large energy systems
… storage such as batteries. The work defines a bandwidth over which such HVAC drives can operate. A practical band-pass filter is realized with a lower frequency bound such that the building maintains consistent temperature, and an upper frequency bound to ensure that commanded HVAC fan speeds …
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Vibration as a method for muscular stimulation
… amplifier The gain was set to 1000 V/V and a band pass filter (-3dB frequency 10 - 500 Hz) was applied; no notch filters were used to suppress line interference. Tiny and lightweight (less than 10 g) three-axial MEMS accelerometers (Freescale semiconductors) were used to measure accelerations …
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Acquisition systems and decoding algorithms of peripheral neural signals for prosthetic applications
… components belonging to the significant bandwidth, and to convert them with a high resolution in order to obtain good performance at the next processing phases. To this aim, a recording module for peripheral neural signals will be presented, based on the use of a sigma-delta architecture …