Results 21 to 30 of about 1,053,086 (266)
Journal of the Optical Society of America A, 2020 We revisit the spectral coherence properties of far-field radiation emanating from an aperture in a blackbody cavity on the basis of Kirchhoff’s boundary conditions. We point out that the far zone cross-spectral density matrix derived earlier in the literature by separately propagating all three aperture-field components does not show transversality of
Al Lakki, Mohammad +2 more
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Monaural Sound Localization Based on Reflective Structure and Homomorphic Deconvolution
Sensors, 2017 The asymmetric structure around the receiver provides a particular time delay for the specific incoming propagation. This paper designs a monaural sound localization system based on the reflective structure around the microphone.
Yeonseok Park +2 more
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Horizontal Plasmonic Ruler Based on the Scattering Far-Field Pattern
Sensors, 2018 A novel method is proposed to detect the horizontal shift of a specific nanoblock relative to a reference nanoblock using surface plasmon modes at nanometer resolution.
Eunso Shin +3 more
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Far-Field Automatic Speech Recognition [PDF]
Proceedings of the IEEE, 2021 The machine recognition of speech spoken at a distance from the microphones, known as far-field automatic speech recognition (ASR), has received a significant increase of attention in science and industry, which caused or was caused by an equally significant improvement in recognition accuracy.
Reinhold Haeb-Umbach +5 more
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Radio Frequency Based Direction Sensing Using Massive MIMO
IEEE Access, 2020 Navigation systems have been widely used in modern applications in which the moving speed and direction estimations are two key steps. Instead of using traditional device-based orientation sensor such as accelerometer and magnetometer to estimate the ...
Xiaolu Zeng +3 more
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Mapping Sound Pressure Levels: A Novel Approach to Determining Near-field and Far-field Regions
Archives of AcousticsThe present study focuses on the spatial characteristics of the sound pressure level (SPL) generated by a circular piston (a circular-shaped acoustic transducer or loudspeaker).
Iliyan Yordanov ILIEV +1 more
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Intelligent Reflecting Surfaces With Spatial Modulation: An Electromagnetic Perspective
IEEE Open Journal of the Communications Society, 2020 Electromagnetic wave control using the concept of a reflecting surface is first studied as a near-field and a far-field problem. Using a secondary source present in a wireless communication environment, such as a backscatter tag, it is possible to ...
Okan Yurduseven +2 more
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From signal analysis to clinical practice: the use of peak frequency in mapping and ablation
Frontiers in Cardiovascular MedicineDifferentiating near-field (NF) from far-field (FF) electrograms (EGMs) is essential for accurate mapping and ablation of cardiac arrhythmias. With the advent of high density mapping systems, this distinction has traditionally relied on bipolar voltage ...
Omnia Kamel +5 more
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Combining measurements, models and decision support systems to optimize outfall sitting [PDF]
Revista DAE, 2016 Santa Catarina Island is located in Southern Brazil and is a touristic spot of the country due to its beautiful beaches. Population growth and seasonal variability demand an improved sanitation system, to be provided by the local government.
Tobias Bleninger +6 more
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Remote SensingSynthetic aperture interferometry (SAI) is a signal processing technique that mixes the signals collected by pairs of elementary antennas to obtain high-resolution images with the aid of a computer.
Eric Anterrieu +2 more
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