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Relevant bibliographies by topics / Signal beamforming / Dissertations / Theses

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Dissertations / Theses on the topic 'Signal beamforming'

Author: Grafiati

Published: 5 June 2025

Last updated: 15 July 2025

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1

Uthansakul, Monthippa. "Wideband beamforming employing fully spatial signal processing /." [St. Lucia, Qld.], 2006. http://adt.library.uq.edu.au/public/adt-QU20070503.135836/index.html.

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2

Manda, Manoj Sai. "Communication Channel Analysis for Efficient Beamforming." Thesis, Blekinge Tekniska Högskola, Institutionen för tillämpad signalbehandling, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-20776.

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In this modern communication era, we are surrounded by unlimited electronic devices, the need to connect with everyone and everything increases dramatically. As the number of electronic devices increases, the amount of data to process increases and the need for higher data speeds occurs. After 1G and 2G, LTE (Long Term Evolution, 3G) come with the improvements in technology which allows reaching those new high data rates. Next comes the upgraded version of LTE called LTE-Advanced, which was launched to boost the speeds further. In this thesis, a 4G LTE environment has been created using (Graph

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3

Tollman, Peter Alan. "Sonar beamforming based upon monaural localisation techniques." Doctoral thesis, University of Cape Town, 1987. http://hdl.handle.net/11427/8360.

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Includes bibliographies.<br>Sonar beamforming is usually accomplished using a multi-element transducer array. To obtain high resolution, such a system is costly and complex. In contrast, many mammals are capable of good angular resolution using only a single active element surrounded by an irregular reflector – the ear. A study of monaural localisation was therefore undertaken, with a view to the development of a novel beamforming system which uses only a single active element. Computer simulations have shown that the direction of a source can be determined by cross –correlating the output sig

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4

Appilla, Chakravarthula Rohan, and Chaithanya Kumar Reddy Veluru. "Intelligent Beam Weight Computation for Massive Beamforming." Thesis, Blekinge Tekniska Högskola, Institutionen för tillämpad signalbehandling, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-15181.

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LTE (Long Term Evolution) is likely the most complex wireless system ever developed. It incorporates features that could not have been economically implemented as recently as a decade ago. Today, with large-scale ICs, LTE can be easily accommodated in base stations and battery-powered handsets alike. LTE-Advanced is the upgraded version of LTE technology for providing more speed and greater reliability. In this report, the wireless communication between the user and base station is implemented by creating 4G LTE environment in MATLAB. Impact of Coherence time on beam weight computation varies

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5

Wang, Lei. "Array signal processing algorithms for beamforming and direction finding." Thesis, University of York, 2009. http://etheses.whiterose.ac.uk/1550/.

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Array processing is an area of study devoted to processing the signals received from an antenna array and extracting information of interest. It has played an important role in widespread applications like radar, sonar, and wireless communications. Numerous adaptive array processing algorithms have been reported in the literature in the last several decades. These algorithms, in a general view, exhibit a trade-off between performance and required computational complexity. In this thesis, we focus on the development of array processing algorithms in the application of beamforming and direction

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6

Zhang, Jie. "Blind adaptive cyclic filtering and beamforming algorithms /." *McMaster only, 2001.

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7

Fuster, Joel J. "A hardware architecture for real-time beamforming." [Gainesville, Fla.] : University of Florida, 2004. http://purl.fcla.edu/fcla/etd/UFE0005060.

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8

Novaes, Marcos (Marcos Nogueira). "Multiresolution Signal Cross-correlation." Thesis, University of North Texas, 1994. https://digital.library.unt.edu/ark:/67531/metadc277645/.

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Signal Correlation is a digital signal processing technique which has a wide variety of applications, ranging from geophysical exploration to acoustic signal enhancements, or beamforming. This dissertation will consider this technique in an underwater acoustics perspective, but the algorithms illustrated here can be readily applied to other areas. Although beamforming techniques have been studied for the past fifty years, modern beamforming systems still have difficulty in operating in noisy environments, especially in shallow water.

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9

Nichols, Brendan. "Vector-sensor beamforming for autonomous glider networks." Thesis, Georgia Institute of Technology, 2015. http://hdl.handle.net/1853/54420.

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Detection and localization of sound sources in an ocean environment can be achieved with a distributed array of passive acoustic sensors. Utilizing an array of autonomous littoral gliders, which offer long-term and quiet operation, and vector sensors, which measure both acoustic pressure and particle velocity, the array's localization performance can be improved. However, vector sensors are susceptible to errors induced by acoustic noise, and autonomous gliders as a sensor platform introduce positional errors. Through both simulations and at-sea data, the localization performance of four proce

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10

Kjellson, Angelica. "Sound Source Localization and Beamforming for Teleconferencing Solutions." Thesis, Umeå universitet, Institutionen för matematik och matematisk statistik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-89707.

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In teleconferencing the audio quality is key to conducting successful meetings. The conference room setting imposes various challenges on the speech signal processing, such as noise and interfering signals, reverberation, or participants positioned far from the telephone unit. This work aims at improving the received speech signal of a conference telephone by implementing sound source localization and beamforming. The implemented microphone array signal processing techniques are compared to the performance of an existing multi-microphone solution and evaluated under various conditions using a

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11

Allred, Daniel Jackson. "Evaluation and Comparison of Beamforming Algorithms for Microphone Array Speech Processing." Thesis, Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/11606.

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Recent years have brought many new developments in the processing of speech and acoustic signals. Yet, despite this, the process of acquiring signals has gone largely unchanged. Adding spatial diversity to the repertoire of signal acquisition has long been known to offer advantages for processing signals further. The processing capabilities of mobile devices had not previously been able to handle the required computation to handle these previous streams of information. But current processing capabilities are such that the extra workload introduced by the addition of mutiple sensors on a mo

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12

Kannan, Balakrishnan. "Spatial signal processing for beamforming in impulsive noise using Bayesian principles." Thesis, University of Cambridge, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.621044.

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13

Hayward, Stephen David. "Adaptive sensor array processing in non-stationary signal environments." Thesis, University of Birmingham, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.368454.

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14

Nordberg, Jörgen. "Signal Enhancement in Wireless Communications Systems." Doctoral thesis, Ronneby : Blekinge Institute of Technology, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-00229.

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Digital Wireless communications has been one of the fastest growing communication techniques during the last decade. Today there exists several different communication systems that use wireless techniques. They share one common property that they transmit data through a radio interface. The radio channel is a tough channel that will both distort and disturb the transmitted signal in various ways. In Jörgen Nordberg's PhD-thesis "Signal Enhancement in Wireless Communications Systems" several different signal enhancement schemes are presented. They have the objective to minimize the impact of th

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15

Marsh, David Moyle. "Phased Array Digital Beamforming Algorithms and Applications." BYU ScholarsArchive, 2019. https://scholarsarchive.byu.edu/etd/7499.

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With the expansion of unmanned aircraft system (UAS) technologies, there is a growing need for UAS Traffic Management (UTM) systems to promote safe operation and development. To be successful, these UTM systems must be able to detect and track multiple drones in the presence of clutter. This paper examines the implementation of different algorithms on a compact, X-band, frequency modulated continuous wave (FMCW) radar in an effort to enable more accurate detection and estimation of drones. Several algorithms were tested through post processing on actual radar data to determine their accuracy a

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Lintz, William A. "Radio frequency signal reception via distributed wirelessly networked sensors under random motion." Monterey, Calif. : Naval Postgraduate School, 2009. http://edocs.nps.edu/npspubs/scholarly/dissert/2009/Sep/09Sep%5FLintz%5FPhD.pdf.

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Dissertation (Ph.D. in Electrical Engineering)--Naval Postgraduate School, September 2009.<br>Dissertation supervisor: McEachen, John ; Tummala, Murali. "September 2009." Description based on title screen as viewed on November 5, 2009. Author(s) subject terms: Sensor Networks, Beamforming, Random Motion, Orientation Includes bibliographical references (p. 197-203). Also available in print.

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17

Liao, Bin, and 廖斌. "New direction finding and beamforming algorithms for sensor arrays with uncertainties." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2013. http://hub.hku.hk/bib/B50899806.

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Sensor arrays have been successfully applied to many engineering fields and the theoretical as well as applied aspects of senor array processing have received intensive research interest. Practically, sensor array systems usually suffer from uncertainties such as unknown gains and phases, mutual coupling, and look direction mismatch. In this thesis, problems of direction finding and beamforming in the presence of array uncertainties are addressed, and new algorithms to tackle these problems are developed. In certain applications, senor arrays are only partly calibrated. Hence, the exact re

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18

Li, Yunhong. "Broadband beamforming and direction finding using concentric ring array." Diss., Columbia, Mo. : University of Missouri-Columbia, 2005. http://hdl.handle.net/10355/4110.

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Thesis (Ph. D.)--University of Missouri-Columbia, 2005.<br>The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file viewed on (July 18, 2006) Vita. Includes bibliographical references.

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19

Nikitakos, Nikitas V. "A comparison of two frequency domain adaptive beamforming algorithms for sonar signal processing." Thesis, Monterey, California. Naval Postgraduate School, 1988. http://hdl.handle.net/10945/22959.

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Computer simulation studies of two frequency domain adaptive beamforming algorithms are presented. The two algorithms are the frequency domain adaptive beamforming modified least-mean-square algorithm, and the proposed new frequency domain adaptive beamforming algorithm based on modified adaptive linear prediction-error filtering. The simulation studies were conducted to determine the multiple broadband target localization capability and the full angular coverage capability of the two algorithms. The number of iterations that the adaptive algorithms took to reach a minimum estimation error was

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20

Rajapaksha, Nilanka Thilina. "Wave-digital Filter Based Circuits for Beamforming and RF-FPGAs." University of Akron / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=akron1427403254.

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21

Townsend, Phil. "Enhancements to the Generalized Sidelobe Canceller for Audio Beamforming in an Immersive Environment." UKnowledge, 2009. http://uknowledge.uky.edu/gradschool_theses/645.

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The Generalized Sidelobe Canceller is an adaptive algorithm for optimally estimating the parameters for beamforming, the signal processing technique of combining data from an array of sensors to improve SNR at a point in space. This work focuses on the algorithm’s application to widely-separated microphone arrays with irregular distributions used for human voice capture. Methods are presented for improving the performance of the algorithm’s blocking matrix, a stage that creates a noise reference for elimination, by proposing a stochastic model for amplitude correction and enhanced use of cross

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Lutnaes, Carl. "Beamforming in 5G mm-wave radionetworks : Importance of frequency multiplexing for users in urban macro environments." Thesis, Uppsala universitet, Signaler och system, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-406129.

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5G brings a few key technological improvements compared to previous generations in telecommunications. These include, but are not limited to, greater speeds, increased capacity and lower latency. These improvements are in part due to using high band frequencies, where increased capacity is found. By advancements in various technologies, mobile broadband traffic has become increasingly chatty, i.e. more small packets are being sent. From a capacity standpoint this characteristic poses a challenge for early 5G millimeter-wave advanced antenna systems. This thesis investigates if network performa

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23

Lim, GuBong. "H-MIMO a hybrid of spatial multiplexing and adaptive beamforming /." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file 1.65 Mb., 69 p, 2005. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:1428176.

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24

Betlehem, Terence, and terenceb@rsise anu edu au. "Acoustic Signal Processing Algorithms for Reverberant Environments." The Australian National University. Research School of Information Sciences and Engineering, 2005. http://thesis.anu.edu.au./public/adt-ANU20051129.121453.

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This thesis investigates the design and the analysis of acoustic signal processing algorithms in reverberant rooms. Reverberation poses a major challenge to acoustic signal processing problems. It degrades speech intelligibility and causes many acoustic algorithms that process sound to perform poorly. Current solutions to the reverberation problem frequently only work in lightly reverberant environments. There is need to improve the reverberant performance of acoustic algorithms.¶ The approach of this thesis is to explore how the intrinsic properties of reverberation can be exploited to impr

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Abhayapala, P. Thushara D., and Thushara Abhayapala@anu edu au. "Modal Analysis and Synthesis of Broadband Nearfield Beamforming Arrays." The Australian National University. Telecommunications Engineering Group, 2000. http://thesis.anu.edu.au./public/adt-ANU20010905.121231.

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This thesis considers the design of a beamformer which can enhance desired signals in an environment consisting of broadband nearfield and/or farfield sources. The thesis contains: a formulation of a set of analysis tools which can provide insight into the intrinsic structure of array processing problems; a methodology for nearfield beamforming; theory and design of a general broadband beamformer; and a consideration of a coherent nearfield broadband adaptive beamforming problem. To a lesser extent, the source localization problem and background noise modeling are also treated. ¶: A set of ana

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26

Okumura, Shigeaki. "Array Signal Processing for Accurate Medical Ultrasound Measurements." Kyoto University, 2018. http://hdl.handle.net/2433/232419.

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27

Ren, Jianqiao. "Microwave Photonic Signal Processing with Dynamic Reconfigurability." Thesis, The University of Sydney, 2016. http://hdl.handle.net/2123/17553.

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An optical beamforming network that uses an uncooled Fabry-Perot laser is demonstrated. This is achieved by using a fast-scanning, high-resolution optical spectrum analyzer to track the frequency and power shift of the uncooled laser, and then reconfiguring a programmable Fourier-domain optical processor to provide compensation. In this way, the need for temperature control of the laser is eliminated, and the number of optical sources is reduced by using the output spectral lines of the laser. The system realizes six wideband microwave photonic phase shifters, and the resulting magnitude and p

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28

Jiang, Mengdi. "Quaternion-valued adaptive signal processing and its applications to adaptive beamforming and wind profile prediction." Thesis, University of Sheffield, 2017. http://etheses.whiterose.ac.uk/16318/.

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Quaternion-valued signal processing has received more and more attentions in the past ten years due to the increasing need to process three or four-dimensional signals, such as colour images, vector-sensor arrays, three-phase power systems, dual-polarisation based wireless communica- tion systems, and wind profile prediction. One key operation involved in the derivation of all kinds of adaptive signal processing algorithms is the gradient operator. Although there are some derivations of this operator in literature with different level of details in the quaternion domain, it is still not fully

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29

Harter, Nathan M. "Development of a Single-Channel Direction Finding Algorithm." Thesis, Virginia Tech, 2007. http://hdl.handle.net/10919/31973.

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A radio direction finding (DF) system uses a multiple-element antenna array coupled with one or more receivers to estimate the direction-of-arrival (DOA) of a targeted emitter using characteristics of the signal received at each of the antennas in the array. In general, DF systems can be classified both by the number of receivers employed as well as which characteristics of the received signal are used to produce the DOA estimate, such as the signal's amplitude, phase, or time of arrival. This work centers on the development and implementation of a novel single-channel direction finding

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30

Morgan, Joshua P. "Time-Frequency Masking Performance for Improved Intelligibility with Microphone Arrays." UKnowledge, 2017. http://uknowledge.uky.edu/ece_etds/101.

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Time-Frequency (TF) masking is an audio processing technique useful for isolating an audio source from interfering sources. TF masking has been applied and studied in monaural and binaural applications, but has only recently been applied to distributed microphone arrays. This work focuses on evaluating the TF masking technique's ability to isolate human speech and improve speech intelligibility in an immersive "cocktail party" environment. In particular, an upper-bound on TF masking performance is established and compared to the traditional delay-sum and general sidelobe canceler (GSC) beamfor

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Ranganathan, Raghuram. "NOVEL COMPLEX ADAPTIVE SIGNAL PROCESSING TECHNIQUES EMPLOYING OPTIMALLY DERIVED TIME-VARYING CONVERGENCE FACTORS WITH APPLICATIO." Doctoral diss., University of Central Florida, 2008. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4089.

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In digital signal processing in general, and wireless communications in particular, the increased usage of complex signal representations, and spectrally efficient complex modulation schemes such as QPSK and QAM has necessitated the need for efficient and fast-converging complex digital signal processing techniques. In this research, novel complex adaptive digital signal processing techniques are presented, which derive optimal convergence factors or step sizes for adjusting the adaptive system coefficients at each iteration. In addition, the real and imaginary components of the complex signal

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32

Xu, Kevin. "Maximum likelihood time-domain beamforming using simulated annealing." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/80046.

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Thesis (S.M.)--Joint Program in Oceanographic Engineering (Massachusetts Institute of Technology, Dept. of Ocean Engineering; and the Woods Hole Oceanographic Institution), 1999.<br>Bibliography: p. 111-112.<br>by Kevin Xu.<br>S.M.

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33

Bousabaa, Sofiane. "Acoustic Green’s Function Estimation using Numerical Simulations and Application to Extern Aeroacoustic Beamforming." Thesis, Sorbonne université, 2018. http://www.theses.fr/2018SORUS228.

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Les techniques d’identification acoustique visent à caractériser les différentes sources de bruit sur un avion à partir de données microphoniques. Ces techniques nécessitent la connaissance de la fonction de Green acoustique du milieu. Or celle-ci n’est connue analytiquement que pour des configurations simples et l’utilisation de fonctions de Green imparfaites conduit à une erreur sur l’identification des sources. L’objectif de cette thèse est de mettre au point une méthode numérique d’estimation des fonctions de Green pour l’imagerie aéroacoustique. La méthode doit avoir un coût

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34

Kurc, David. "Identifikace zdrojů hluku pomocí beamformingu." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2011. http://www.nusl.cz/ntk/nusl-218831.

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This master's thesis is focused on the noise source identification using microphone arrays and beamforming as the signal processing method. It describes parts of such a system and provides a comparison with other systems that serve a similar purpose (eg. NAH). Various types of microphone arrays are mentioned with their influence on the resulting ability to identify the noise source. We are further focusing on Delay-And-Sum technology, on which we are explaining the basic principles and constraints of beamforming. The practical part describes the implementation of the DAS method in MATLAB and C

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FERRETTI, DANIELE. "Signal Processing algorithms and Learning Systems for Infant Cry Detection." Doctoral thesis, Università Politecnica delle Marche, 2019. http://hdl.handle.net/11566/263671.

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I segnali associati al pianto dei neonati contengono preziose informazioni relative allo stato del bambino. L’estrazione di queste informazioni richiede un algoritmo di rilevazione del pianto in grado di operare in ambienti con condizioni acustiche difficili caratterizzati dalla presenza di fonti di rumore come pianti interferenti, apparecchiature mediche e persone. Il rilevamento del pianto infantile è una funzione importante sia negli ambienti residenziali che in quelli pubblici, in grado di rispondere alle differenti esigenze dei professionisti e degli utenti privati. Nella presente dissert

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Hickish, Jack. "Digital signal processing methods for large-N, low-frequency radio telescopes." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:7d983fb3-9411-4906-92cd-70e2c1040b54.

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Current attempts to make precision measurements of the HI power spectrum at high redshifts have led to the construction of several low-frequency, large-N, interferometric arrays. The computational demands of digital correlators required by these arrays present a significant challenge. These demands stem from the treatment of radio telescopes as collections of two-element interferometers, which results in the need to multiply O(N<sup>2</sup>) pairs of antenna signals in an N-element array. Given the unparalleled flexibility offered by modern digital processing systems, it is apt to consider whe

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Yu, Jingjing. "MICROPHONE ARRAY OPTIMIZATION IN IMMERSIVE ENVIRONMENTS." UKnowledge, 2013. http://uknowledge.uky.edu/ece_etds/19.

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The complex relationship between array gain patterns and microphone distributions limits the application of traditional optimization algorithms on irregular arrays, which show enhanced beamforming performance for human speech capture in immersive environments. This work analyzes the relationship between irregular microphone geometries and spatial filtering performance with statistical methods. Novel geometry descriptors are developed to capture the properties of irregular microphone distributions showing their impact on array performance. General guidelines and optimization methods for regular

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Ruzindana, Mark William. "Real-Time Beamforming Algorithms for the Focal L-Band Array on the Green Bank Telescope." BYU ScholarsArchive, 2017. https://scholarsarchive.byu.edu/etd/6622.

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A phased array feed (PAF) provides a contiguous, electronically synthesized wide field of view for large-dish astronomical observatories. Significant progress has been made in recent years in improving the sensitivity of PAF receivers though optimizing the design of the antenna array, cryogenic cooling of the front end, and implementation of real-time correlation and beamforming in digital signal processing. FLAG is a 19 dual-polarized element phased array with cryogenic LNAs, direct digitization of RF signals at the front end, digital signal transport over fiber, and a real time signal proces

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Zanatta, Filho Danilo. "Novas tecnicas de processamento espaço-temporal em transmissão conciliando diversidade e beamforming." [s.n.], 2006. http://repositorio.unicamp.br/jspui/handle/REPOSIP/260848.

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Orientador: João Marcos Travassos Romano<br>Tese (doutorado) - Universidade Estadual de Campinas. Faculdade de Engenharia Eletrica e de Computação<br>Made available in DSpace on 2018-08-07T23:30:42Z (GMT). No. of bitstreams: 1 ZanattaFilho_Danilo_D.pdf: 1987916 bytes, checksum: be6038a70235bda4b62a193a0296ffb7 (MD5) Previous issue date: 2006<br>Resumo: O presente trabalho trata da utilização, em transmissão, de um arranjo de antenas na estação rádio-base de um sistema de comunicação celular. Na recepção, as soluções para explorar o arranjo são atualmente bem estabelecidas na literatura. Por

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Engholm, Marcus. "Ultrasonic Arrays for Sensing and Beamforming of Lamb Waves." Doctoral thesis, Uppsala universitet, Signaler och System, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-122189.

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Non-destructive testing (NDT) techniques are critical to ensure integrity and safety of engineered structures. Structural health monitoring (SHM) is considered as the next step in the field enabling continuous monitoring of structures. The first part of the thesis concerns NDT and SHM using guided waves in plates, or Lamb waves, to perform imaging of plate structures. The imaging is performed using a fixed active array setup covering a larger area of a plate. Current methods are based on conventional beamforming techniques that do not efficiently exploit the available data from the small array

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Oukaci, Abdelkader. "Beamforming et détection pour signaux non circulaires et/ou non gaussiens (algorithmes et performance)." Phd thesis, Institut National des Télécommunications, 2010. http://tel.archives-ouvertes.fr/tel-00612333.

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Cette thèse est consacrée à l'exploitation des propriétés de non circularité et de non gaussianité des signaux en traitement d'antennes.Dans une première partie de cette thèse, nous nous intéressons au contexte de la formation de voies (beamforming) pour la réception d'un signal utile inconnu, dont le vecteur directionnel est connu, corrompu par un bruit potentiellement non circulaire et/ou non gaussien. Dans des études récentes, un beamformer MVDR (Minimum Variance Distortionless Response) linéaire au sens large WL (Widely Linear) exploitant la non circularité au second ordre (SO) des interfé

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SHIKANO, Kiyohiro, Fumitada ITAKURA, Kazuya TAKEDA, Hiroshi SARUWATARI, and Hidekazu KAMIYANAGIDA. "Direction of Arrival Estimation Using Nonlinear Microphone Array." Institute of Electronics, Information and Communication Engineers, 2001. http://hdl.handle.net/2237/15048.

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As'ad, Hala. "Acoustic Beamformers and Their Applications in Hearing Aids." Thesis, Université d'Ottawa / University of Ottawa, 2020. http://hdl.handle.net/10393/41540.

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This work introduces new binaural beamforming algorithms for hearing aids, with a robustness to errors in the estimate of the target speaker direction of arrival (DOA) and a good trade-off between noise reduction and preservation of the noise/interferers spatial impression. Three robust designs are proposed, and their robustness is confirmed by simulation results. These robust designs are a combination of binaural and monaural beamformers using two different microphone configurations: one for low frequency components and one for high frequency components. The robust designs are also found to b

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Chambatte, Eric. "Traitement de signal pour antenne de transducteurs en vue de l’identification/reproduction d’environnement sonore de cabine d’avion." Mémoire, Université de Sherbrooke, 2011. http://savoirs.usherbrooke.ca/handle/11143/394.

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La reproduction réaliste d’environnements sonores est à ce jour un domaine actif de recherche. Ici, le cas traité est celui de la reproduction de l’environnement sonore d’une cabine d’avion en vol dans une maquette de celle-ci. Dans cette optique une connaissance la plus complète possible du milieu de reproduction ainsi que du champ de pression acoustique à reproduire est alors nécessaire. Pour ce faire la technique de résolution du problème inverse constitue un outil des plus adaptés. Le gros défaut de cette technique est sa sensibilité aux bruits de mesures inévitables dans des conditions ré

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Behrle, Charles D. "Computer simulation studies of multiple broadband target localization via frequency domain beamforming for planar arrays." Thesis, Monterey, California. Naval Postgraduate School, 1988. http://hdl.handle.net/10945/22976.

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Approved for public release; distribution is unlimited<br>Computer simulation studies of a frequency domain adaptive beamforming algorithm are presented. These simulation studies were conducted to determine the multiple broadband target localization capability and the full angular coverage capability of the algorithm. The algorithm was evaluated at several signal-to-noise ratios with varying sampling rates. The number of iterations that the adaptive algorithm took to reach a minimum estimation error was determined. Results of the simulation studies indicate that the algorithm can localize mult

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Wilkins, Nathan Allen. "Signal Subspace Processing in the Beam Space of a True Time Delay Beamformer Bank." Wright State University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=wright1433034139.

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Dey, Ajoy Kumar, and Susmita Saha. "Acoustic Beamforming : Design and Development of Steered Response Power With Phase Transformation (SRP-PHAT)." Thesis, Blekinge Tekniska Högskola, Sektionen för ingenjörsvetenskap, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-3226.

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Acoustic Sound Source localization using signal processing is required in order to estimate the direction from where a particular acoustic source signal is coming and it is also important in order to find a soluation for hands free communication. Video conferencing, hand free communications are different applications requiring acoustic sound source localization. This applications need a robust algorithm which can reliably localize and position the acoustic sound sources. The Steered Response Power Phase Transform (SRP-PHAT) is an important and roubst algorithm to localilze acoustic sound sourc

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Moghimi, Amir Reza. "Array-based Spectro-temporal Masking For Automatic Speech Recognition." Research Showcase @ CMU, 2014. http://repository.cmu.edu/dissertations/334.

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Over the years, a variety of array processing techniques have been applied to the problem of enhancing degraded speech to improve automatic speech recognition. In this context, linear beamforming has long been the approach of choice, for reasons including good performance, robustness and analytical simplicity. While various non-linear techniques - typically based to some extent on the study of auditory scene analysis - have also been of interest, they tend to lag behind their linear counterparts in terms of simplicity, scalability and exibility. Nonlinear techniques are also more difficult to

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Korven, Joshua David. "A Comparison of Wavelet and Simplicity-Based Heart Sound and Murmur Segmentation Methods." DigitalCommons@CalPoly, 2016. https://digitalcommons.calpoly.edu/theses/1651.

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Stethoscopes are the most commonly used medical devices for diagnosing heart conditions because they are inexpensive, noninvasive, and light enough to be carried around by a clinician. Auscultation with a stethoscope requires considerable skill and experience, but the introduction of digital stethoscopes allows for the automation of this task. Auscultation waveform segmentation, which is the process of determining the boundaries of heart sound and murmur segments, is the primary challenge in automating the diagnosis of various heart conditions. The purpose of this thesis is to improve the accu

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Elmer, Michael James. "Improved Methods for Phased Array Feed Beamforming in Single Dish Radio Astronomy." BYU ScholarsArchive, 2012. https://scholarsarchive.byu.edu/etd/3340.

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Among the research topics needing to be addressed to further the development of phased array feeds (PAFs) for radio astronomical use are challenges associated with calibration, beamforming, and imaging for single dish observations. This dissertation addresses these concerns by providing analysis and solutions that provide a clearer understanding of the effort required to implement PAFs for complex scientific research. It is shown that calibration data are relatively stable over a period of five days and may still be adequate after 70 days. A calibration update system is presented with the pote

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