1,245 resources related to Sonar measurements
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The conference program will consist of plenary lectures, symposia, workshops and invitedsessions of the latest significant findings and developments in all the major fields of biomedical engineering.Submitted full papers will be peer reviewed. Accepted high quality papers will be presented in oral and poster sessions,will appear in the Conference Proceedings and will be indexed in PubMed/MEDLINE.
The CDC is the premier conference dedicated to the advancement of the theory and practice of systems and control. The CDC annually brings together an international community of researchers and practitioners in the field of automatic control to discuss new research results, perspectives on future developments, and innovative applications relevant to decision making, automatic control, and related areas.
2020 IEEE Conference on Computer Vision and Pattern Recognition (CVPR)
CVPR is the premier annual computer vision event comprising the main conference and several co-located workshops and short courses. With its high quality and low cost, it provides an exceptional value for students, academics and industry researchers.
The International Conference on Robotics and Automation (ICRA) is the IEEE Robotics and Automation Society’s biggest conference and one of the leading international forums for robotics researchers to present their work.
The Conference focuses on all aspects of instrumentation and measurement science andtechnology research development and applications. The list of program topics includes but isnot limited to: Measurement Science & Education, Measurement Systems, Measurement DataAcquisition, Measurements of Physical Quantities, and Measurement Applications.
The IEEE Aerospace and Electronic Systems Magazine publishes articles concerned with the various aspects of systems for space, air, ocean, or ground environments.
The theory, design and application of Control Systems. It shall encompass components, and the integration of these components, as are necessary for the construction of such systems. The word `systems' as used herein shall be interpreted to include physical, biological, organizational and other entities and combinations thereof, which can be represented through a mathematical symbolism. The Field of Interest: shall ...
IEEE Computer Graphics and Applications (CG&A) bridges the theory and practice of computer graphics. From specific algorithms to full system implementations, CG&A offers a strong combination of peer-reviewed feature articles and refereed departments, including news and product announcements. Special Applications sidebars relate research stories to commercial development. Cover stories focus on creative applications of the technology by an artist or ...
Theory, concepts, and techniques of science and engineering as applied to sensing the earth, oceans, atmosphere, and space; and the processing, interpretation, and dissemination of this information.
The fundamental nature of the communication process; storage, transmission and utilization of information; coding and decoding of digital and analog communication transmissions; study of random interference and information-bearing signals; and the development of information-theoretic techniques in diverse areas, including data communication and recording systems, communication networks, cryptography, detection systems, pattern recognition, learning, and automata.
OCEANS '86, 1986
A prodedure is described for localization of an underwater sound source through measurement of the sound pressure levels in the water at several receivers. Although 'acoustic ranging' techniques have significant drawbacks, especially limited information at the receiver on the source level and the attenuation of the transmisson path, the procedure uses iterative digital processing to determine the best solution, given ...
Proceedings of the 1981 2nd International Symposium on Unmanned Untethered Submersible Technology, 1981
1996 IEEE International Symposium on Circuits and Systems. Circuits and Systems Connecting the World. ISCAS 96, 1996
Multipath propagation is common in sonar and radar, and it has made the task of time delay estimation much more difficult. In this paper, an adaptive algorithm based on a generalized equalization approach is proposed which provides spontaneous measurements of the difference in arrival times of a signal received at two separated sensors as well as the multipath channel characteristics. ...
2012 12th International Conference on Control, Automation and Systems, 2012
In practice, there could be more than two ceilings of different heights under an indoor environment and a robot under the desk could perceive the desk as a ceiling. In this case, a distance between ceilings and a robot seriously affects a performance of ceiling vision-based simultaneous localization and mapping (cv-SLAM). Therefore, in this paper, we propose the cv-SLAM using ...
IEEE Transactions on Sonics and Ultrasonics, 1976
IMS 2011 Microapps - Pulsed S-Parameter Measurements Using PXI Instruments
IMS 2011 Microapps - Time Domain Measurements in Waveguide
IMS 2012 Microapps - Use of FPGAs for Faster Test Times and Repeatability on Cellular Measurements
IMS 2012 Microapps - Generation and Analysis Techniques for Cost-efficient SATCOM Measurements Richard Overdorf, Agilent
IMS 2012 Microapps - Basic Amplifier Measurements with the RF Vector Network Analyzer (VNA) Taku Hirato, Agilent
Brooklyn 5G - 2015 - Andreas F. Molisch - Channel Measurements for Massive MIMO
IMS 2011 Microapps - IQ Mixer Measurements: Techniques for Complete Characterization of IQ Mixers Using a Multi-Port Vector Network Analyzer
Louis Scharf receives the IEEE Jack S. Kilby Signal Processing Medal - Honors Ceremony 2016
Panel Session: 5G Test and Measurements - 5G Summit at IMS 2017
ISEC 2013 Special Gordon Donaldson Session: Remembering Gordon Donaldson - 6 of 7 - A high sensitive magnetometer system for natural magnetic field measurements
IMS MicroApps: Nonlinear Co-Simulation with Real-Time Channel Measurements
Introducing the Kalman Filter
Micro-Apps 2013: Determining Circuit Material Dielectric Constant from Phase Measurements
Spectrum Analysis: RF Boot Camp
2015 IEEE Honors: IEEE Jack S. Kilby Signal Processing Medal - Harry L. Van Trees
Phase Retrieval with Application to Optical Imaging
Brooklyn 5G Summit 2014: Channel Measurements Summary by Ted Rappaport
Brooklyn 5G Summit 2014: Jonas Medbo on 5G Channel Modeling Challenges
Micro-Apps Keynote 2013: Modern RF Measurements and How They Drive Spectrum Analyzer Digital IF Processor Design
A prodedure is described for localization of an underwater sound source through measurement of the sound pressure levels in the water at several receivers. Although 'acoustic ranging' techniques have significant drawbacks, especially limited information at the receiver on the source level and the attenuation of the transmisson path, the procedure uses iterative digital processing to determine the best solution, given a particular set of circumstances. A particularly attractive byproduct of the procedure is the value of the source level associated with the best solution. Successive application of the procedure provides course and speed of the sound source.
Multipath propagation is common in sonar and radar, and it has made the task of time delay estimation much more difficult. In this paper, an adaptive algorithm based on a generalized equalization approach is proposed which provides spontaneous measurements of the difference in arrival times of a signal received at two separated sensors as well as the multipath channel characteristics. The method attempts to minimize a multimodal cost function whose global minimum gives the exact values of the time delay and multipath parameters. A simple initialization scheme is employed and the stochastic gradient descent method is used for descending toward the minimum of the performance surface. The performance of the proposed algorithm is analysed and simulation results are given to illustrate that the method is capable of estimating the system parameters accurately for different number of multipaths.
In practice, there could be more than two ceilings of different heights under an indoor environment and a robot under the desk could perceive the desk as a ceiling. In this case, a distance between ceilings and a robot seriously affects a performance of ceiling vision-based simultaneous localization and mapping (cv-SLAM). Therefore, in this paper, we propose the cv-SLAM using sensor fusion of mono-camera and sonar sensor. A sonar sensor can provide more exact distance between ceiling and a robot, and it helps to produce the improved performance of cv-SLAM.
Describes a position and orientation system for submersible vehicles (POS/SV), designed to provide a full navigation solution for submersible vehicles (SV). Its intended applications are those requiring accurate and continuous position and orientation data in very deep or very shallow water where acoustic positioning systems (APS) alone become sporadic, noisy and generally unreliable. These applications include positioning for SV navigation, positioning and orientation for template survey, deep water multibeam sonar bathymetry requiring both position and orientation for sonar motion compensation and data georeferencing, site surveying and pipe and cable surveying and synthetic aperture sonar (SAS) motion compensation.
Recently discovered families of piezoelectric Lead Magnesium Niobate/Lead Titariate (PMN-PT) and Lead Zinc Niobate/Lead Titanate (PZN-PT) single crystal materials have generated great interest in the Navy sonar community because of their high 33-mode coupling factor and large saturation strain, thereby potentially allowing sonar transducers with greatly increased bandwidth and power density. The Naval Undersea Warfare Center (NUWC) is developing a prototype single crystal high power sonar transducer for potential naval applications. In addition to progress on the transducer development, measurements on the single crystal materials are presented.
The control of underwater robots presents a number of unique and formidable challenges. Underwater robot dynamics are highly nonlinear, coupled, and time- varying, and subject to hydrodynamic uncertainties and external disturbances such as current. Unlike land mobile robots, underwater robots cannot use GPS. Most popular underwater positioning sensors are sonar-based, such as long-base line. However, autonomous processing of sonar measurements is plagued by noise, drop-outs, missed detection, false reading, poor resolution, etc. The paper presents a new adaptive control of underwater robots with sonar-based position measurements. Experimental results show robustness of the control system in the presence of unmodelled dynamics and various noise.
Panoramic sweeps produced by a scanning range sensor often defy interpretation using conventional line-of-sight models, particularly when the environment contains curved, specularly reflective surfaces. Combining multiple scans from different vantage points provides geometric constraints necessary to solve this problem, but not without introducing new difficulties. Existing multiple scan implementations, for the most part, ignore the data correspondence issue. The multiple hypothesis tracking (MHT) algorithm explicitly deals with data correspondence. Given canonical observations extracted from raw scans, the MHT applies multiple behavior models to explain their evolution from one scan to the next. This technique identifies different topological features in the world to which it assigns the corresponding measurements. We apply the algorithm to real sonar scans generated specifically for this investigation. The experiments consist of interrogating a variety of two-dimensional prismatic objects, standing on end in a 1.2-m-deep freshwater tank, from multiple vantage points using a 1.25 MHz profiling sonar system. The results reflect the validity of the algorithm under the initial assumptions and its gradual performance degradation when these assumptions fail to characterize the environment adequately. We close with recommendations that detail extending the approach to handle more natural underwater settings.
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