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.
Results
Showing 1 to 20 of 80 for “"random noise"”.
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PCM television bandwidth reduction using pseudo-random noise
Thesis: M.S., Massachusetts Institute of Technology, Department of Electrical Engineering, 1961
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The response of continuous systems to random noise fields
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1955.
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The Digital Adaptive Control of a Linear Process Modulated by Random Noise
Made available in DSpace on 2014-12-04T21:03:27Z (GMT). No. of bitstreams: 1 6202948.pdf: 2658225 bytes, checksum: e284ec4dc66764f93f4979aa93ec2c56 (MD5) Previous issue date: 1962
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The optimization and analysis of systems for the detection of pulse signals in random noise
Thesis (Sc.D.) Massachusetts Institute of Technology. Dept. of Electrical Engineering, 1951.
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Differentiating noise and modulators in artificial neural networks
… in network operation by the injection of random noise; and the neurobiological finding that neuropeptides may exist as slower Signal transmission channels between neurons. This study concerns the difference between random noise injection, and directed, low-level, activity injections which …
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Maximum likelihood time-domain beamforming using simulated annealing
… Broadband signals in spatially correlated noise are treated. Previous time-domain beamformers did not consider the correlation between random noise, and they did not use the concept of maximum likelihood, which is asymptotically optimal. We show that improved resolution can be achieved …
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Analytical Models to Predict Power Harvesting with Piezoelectric Materials
… and cantilever plate. Harmonic oscillations and random noise will be the two different forcing functions used to drive each system. The predictive models are validated by being compared to experimental data. A parametric study is also performed in an attempt to optimize the cantilever beam …
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Rapid Acquisition of Telephone Line Channel for High Speed Data Transmission Without Using Training Sequences
… phase hits, phase jitters, amplitude jitter and noise. The channel acquisition is achieved without using long training sequences but the data itself is used to acquire the channel. This problem is discussed with reference to a orthogononal frequency division multiplexed modem for high speed data …
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Characterization of a missle flyout simulation
… of a missile flyout software simulation to input noise. The research is intended to augment the current characterization tests employed by the Electronic Warfare Testing community. This thesis explores the direct relationship between specific input noise signals and individual simulation …
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The Limits of Recovering Planted Subgraphs
… observes the union of the “signal,” which is a random “planted” copy H* of H, together with random noise in the form of an instance of an Erdős–Rényi graph ´ G(n, p). Their goal is to then recover the planted H* from the observed graph. Our focus in this work is to understand the minimum mean …
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LOW POWER AND HIGH SIGNAL TO NOISE RATIO BIO-MEDICAL AFE DESIGN TECHNIQUES
… novel techniques to implement a low-power and noise Bio-Medical Analog Front End (BMEF) circuit technique to enable high-quality Electrocardiography (ECG) sensing. Usually, an ECG signal and several bio-medical signals are sensed from the human body through a pair of electrodes. The electrical …
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Near-optimal data-driven approximation schemes for joint pricing and inventory control models
… objective is to match the inventory level with a random demand that depends on the price in each period, while maximizing the expected profit over finite horizon. In reality, the demand functions or the distribution of the random noise are usually unavailable, whereas past demand data are …
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Kalman filtering of IMU sensor for robot balance control
… A test bed was created to characterize the random noise and errors inherent to orientation sensing in the MicroStrain 3DM-GX1 IMU for static cases as well as after experiencing an impact force. Balance simulations were performed to control the center of mass location of a robot modeled as an …
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Adaptive algorithms for problems involving black-box Lipschitz functions
… output of function evaluations is corrupted by random noise. For optimization over higher dimensional domains, we prove that good adaptive algorithms are impossible.
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On the Development of a Real-Time Embedded Digital Controller for Heavy Truck Semiactive Suspensions
… The completed system was then tested for both random noise (on highway driving) and impulse (speed bump) response. The test results showed that for the damping tuning and controller arrangements used in this study, semiactive dampers do not offer any significant benefits in reducing overall …
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Point-Spread Function Assessment of SG-DBR Based Swept Source for OCT Imaging
… mechanism, there are a number of systematic and noise sources that can affect the quality of the OCT point-spread function (PSF). Based on these noise sources, software is developed to simulate the waveforms in an SS-OCT system and determine the factors that limit width of the PSF central peak …
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High-resolution Optical Scanning Holography
… with an in-depth analysis in the area where random noise and other imperfection effects may occur. In this thesis, three different approaches of reconstruction process are presented to provide in high-resolution a comparison between theoretical and experimental reconstruction a hologram of …
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Magnetoencephalographic Study on the Representation of Huygens Noise in the Auditory Cortex of Humans
… by using regular interval sounds (RIS-Huygens noise). The distinct pitch of RIS is introduced by delaying random noise and adding it back to the same noise. The relation between the psychoacoustically measured pitch of RIS and the auditory evoked neuromagnetic responses was investigated. The …
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Statistical physics of error-correcting codes
… constructions, the arbitrary messages and the random noise vectors. We find, as the noise level increases, a phase transition between successful decoding and failure phases. This phase transition coincides with upper bounds derived in the information theory literature in most of the cases. We …
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A theoretical study of complementary binary code sequences and a computer search for new kernels.
… should find much application as pseudo- random noise modulation signals for both radar and communications systems. A discussion of the need for such sequences is included in the introduction and is followed by a state of the art description. An operations group on the sequences is …
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