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You searched for subject:(Multisine). Showing records 1 – 3 of 3 total matches.

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1. Kornaropoulos, E.N. Corticomuscular communication study by using current source density analysis:.

Degree: 2011, Delft University of Technology

Corticomuscular communication during wrist motor tasks was investigated in this study. EEG signals from the sensorimotor cortex and EMG data from the reflexive carpi radialis and extensor carpi radialis muscles were recorded from five healthy subjects while performing visual-motor force tasks, with and without perturbation on the wrist. Different continuous perturbation signals with different frequency content (multisines), as well as perturbation resulting in rapid angular displacements of the wrist were applied to study the existence of synchronization on corticomuscular communication, as well as the possible trancortical contribution to the late reflexes on the muscle. Corticomuscular, perturbation- EEG and perturbation - EMG coherences were calculated for all tasks. Three out of five subjects did show high coherence results in beta band when applying multisine perturbation and decreased in base task and in tasks with rapid angular displacements of the wrist, implying an Ia afferent contribution from muscle spindles to beta EEG. The connection of the perturbation to the brain and the muscles is considered non-linear due to high corticomuscular coherence found in harmonics of the excited frequencies. Current source density was applied on frequencies with high corticomuscular coherence. Contralateral supplementary motor cortex is more likely to cause corticomuscular communication at high frequencies of the beta band. Moreover, proprioceptive-evoked potentials were calculated from tasks with continuous rapid angular displacements of the wrist. The basal ganglia is more likely to be involved in the generation of early proprioceptive-evoked activity. Advisors/Committee Members: Van der Helm, F.C.T., Schouten, A.C..

Subjects/Keywords: continuous perturbation; current source density; DICS; dipole fitting; EEG; EMG; head model; multisine; wrist

…consisted of 360 seconds. Afterwards, two multisine perturbations were applied (referred in… …of the MS perturbations is 55 seconds. We assume that multisine perturbation do effect… …points in each case of multisine, since the excited frequencies are not all the same. In the… …compare the result in coherence in these common frequencies in each case of multisine and verify… …the effect of multisine in coherence, in case we find similar high coherence in the common… 

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APA (6th Edition):

Kornaropoulos, E. N. (2011). Corticomuscular communication study by using current source density analysis:. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:2efc4b46-eccc-472d-9b9f-babbcc7cfb5d

Chicago Manual of Style (16th Edition):

Kornaropoulos, E N. “Corticomuscular communication study by using current source density analysis:.” 2011. Masters Thesis, Delft University of Technology. Accessed January 22, 2020. http://resolver.tudelft.nl/uuid:2efc4b46-eccc-472d-9b9f-babbcc7cfb5d.

MLA Handbook (7th Edition):

Kornaropoulos, E N. “Corticomuscular communication study by using current source density analysis:.” 2011. Web. 22 Jan 2020.

Vancouver:

Kornaropoulos EN. Corticomuscular communication study by using current source density analysis:. [Internet] [Masters thesis]. Delft University of Technology; 2011. [cited 2020 Jan 22]. Available from: http://resolver.tudelft.nl/uuid:2efc4b46-eccc-472d-9b9f-babbcc7cfb5d.

Council of Science Editors:

Kornaropoulos EN. Corticomuscular communication study by using current source density analysis:. [Masters Thesis]. Delft University of Technology; 2011. Available from: http://resolver.tudelft.nl/uuid:2efc4b46-eccc-472d-9b9f-babbcc7cfb5d


University of North Texas

2. Nagarajan, Preeti. Design of Power Amplifier Test Signals with a User-Defined Multisine.

Degree: 2004, University of North Texas

Cellular radio communication involves wireless transmission and reception of signals at radio frequencies (RF). Base stations house equipment critical to the transmission and reception of signals. Power amplifier (PA) is a crucial element in base station assembly. PAs are expensive, take up space and dissipate heat. Of all the elements in the base station, it is difficult to design and operate a power amplifier. New designs of power amplifiers are constantly tested. One of the most important components required to perform this test successfully is a circuit simulator model of an entire communication system that generates a standard test signal. Standard test signals 524,288 data points in length require 1080 hours to complete one test of a PA model. In order to reduce the time taken to complete one test, a 'simulated test signal,' was generated. The objective of this study is to develop an algorithm to generate this 'simulated' test signal such that its characteristics match that of the 'standard' test signal. Advisors/Committee Members: McNeill, Perry, Kozak, Michael R., Pinckley, Danny, Grubbs, Albert B..

Subjects/Keywords: Power amplifiers.; power amplifier; power amplifier test signals; multisine with user-defined amplitude spectrum

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Nagarajan, P. (2004). Design of Power Amplifier Test Signals with a User-Defined Multisine. (Thesis). University of North Texas. Retrieved from https://digital.library.unt.edu/ark:/67531/metadc4454/

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Nagarajan, Preeti. “Design of Power Amplifier Test Signals with a User-Defined Multisine.” 2004. Thesis, University of North Texas. Accessed January 22, 2020. https://digital.library.unt.edu/ark:/67531/metadc4454/.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Nagarajan, Preeti. “Design of Power Amplifier Test Signals with a User-Defined Multisine.” 2004. Web. 22 Jan 2020.

Vancouver:

Nagarajan P. Design of Power Amplifier Test Signals with a User-Defined Multisine. [Internet] [Thesis]. University of North Texas; 2004. [cited 2020 Jan 22]. Available from: https://digital.library.unt.edu/ark:/67531/metadc4454/.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Nagarajan P. Design of Power Amplifier Test Signals with a User-Defined Multisine. [Thesis]. University of North Texas; 2004. Available from: https://digital.library.unt.edu/ark:/67531/metadc4454/

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation


Georgia Tech

3. McKinley, Michael Dean. Improved frequency domain measurement techniques for characterizing power amplifier and multipath environments.

Degree: PhD, Electrical and Computer Engineering, 2008, Georgia Tech

This work focuses on fixing measurement inaccuracies to which models and figures of merit are susceptible in two wireless communication environments: power amplifier and multipath. To emulate or rate the performance of these environments, models and figures of merit, respectively, are often used. The usefulness of a model depends on how accurately and efficiently it emulates its real-world counterpart. The usefulness of a figure of merit depends on how accurately it represents system behavior. Most discussions on the challenges and trade-offs faced in modeling nearly always focus on the complexity of the device or channel of interest and the resultant difficulty in describing it. Similarly, figures of merit are meant only to summarize the performance of the device or channel. At some point, either in generation or verification of a model or figure of merit, there is a dependence on measured data. Though the complexity and performance of the device or channel are challenges by themselves, there are other significant sources of distortion that must be minimized to avoid errors in the measured data. For this work, the unique distortion of power amplifier and multipath environments is considered, and then errors in measurement which would obscure these distortions are eliminated. Specifically, three measurement issues are addressed: 1) identifying measurement setup artifacts, 2) achieving consistent measurement results and 3) reducing variations in the environment. This work contributes to increasing the accuracy of microwave measurements used in the modeling of nonlinear high-power amplifiers and used in figures of merit for power amplifiers and multipath channels. Advisors/Committee Members: James Stevenson Kenney (Committee Chair), Gregory David Durgin (Committee Member), Madhavan Swaminathan (Committee Member).

Subjects/Keywords: CDMA; Orthogonal frequency division multiplexing; Code division multiple access; Multisine error vector magnitude; Multisine; OFDM; Wiener; Parallel Wiener; Memory; Class AB; Two tone measurement; Asymmetry; IMD; Intermodulation distortion; Spectral leakage; VSA; Vector signal analyzer; Rayleigh; Rice; Gauss; Power amplifier; Multipath; Measurement; Microwave; Error vector magnitude; Wireless communication systems; Microwave measurements; Amplifiers (Electronics); Simulation methods

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

McKinley, M. D. (2008). Improved frequency domain measurement techniques for characterizing power amplifier and multipath environments. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/24722

Chicago Manual of Style (16th Edition):

McKinley, Michael Dean. “Improved frequency domain measurement techniques for characterizing power amplifier and multipath environments.” 2008. Doctoral Dissertation, Georgia Tech. Accessed January 22, 2020. http://hdl.handle.net/1853/24722.

MLA Handbook (7th Edition):

McKinley, Michael Dean. “Improved frequency domain measurement techniques for characterizing power amplifier and multipath environments.” 2008. Web. 22 Jan 2020.

Vancouver:

McKinley MD. Improved frequency domain measurement techniques for characterizing power amplifier and multipath environments. [Internet] [Doctoral dissertation]. Georgia Tech; 2008. [cited 2020 Jan 22]. Available from: http://hdl.handle.net/1853/24722.

Council of Science Editors:

McKinley MD. Improved frequency domain measurement techniques for characterizing power amplifier and multipath environments. [Doctoral Dissertation]. Georgia Tech; 2008. Available from: http://hdl.handle.net/1853/24722

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