Results 41 to 50 of about 138,284,646 (282)
Practical 3-D Beam Pattern Based Channel Modeling for Multi-Polarized Massive MIMO Systems
Sensors, 2018 In this paper, a practical non-stationary three-dimensional (3-D) channel models for massive multiple-input multiple-output (MIMO) systems, considering beam patterns for different antenna elements, is proposed.
Saeid Aghaeinezhadfirouzja +2 more
doaj +1 more source
Direct Position Determination of Multiple Radio Signals
EURASIP Journal on Advances in Signal Processing, 2005 The most common methods for position determination of radio signal emitters such as communications or radar transmitters are based on measuring a specified parameter such as angle of arrival (AOA) or time of arrival (TOA) of the signal.
Weiss Anthony J, Amar Alon
doaj +1 more source
Indoor positioning in 5G new radio: how it works, status quo of research, and the road ahead
ICT ExpressIn this paper, the architecture and mechanism of 5G New Radio indoor positioning schemes such as downlink time difference of arrival (DL-TDOA), uplink (UL) TDOA, multiple-cell round trip time (Multi-RTT), DL angle of departure, UL angle of arrival (AOA),
Jiaqi Li, Seung-Hoon Hwang
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RFID Localization Using Angle of Arrival Cluster Forming
International Journal of Distributed Sensor Networks, 2014 Radio Frequency IDentification (RFID) has been increasingly used to identify and track objects automatically. RFID has also been used to localize tagged objects.
Waleed Alsalih +2 more
doaj +1 more source
Two Dimensional Angle of Arrival Estimation
CoRR, 2016 We present a new method for the estimation of two dimensional (2D) angles of arrival (AOAs), namely, azimuth and incidence angles of multiple narrowband signals of same frequency in the far field of antenna array.
Santhosh Kumar, Pradip Sircar
openaire +2 more sources
Body condition of shorebirds upon arrival at their Siberian breeding grounds [PDF]
, 2009 Arctic breeding shorebirds carry substantial body stores on their long-distance migrations from their non-breeding grounds. Upon arrival at the breeding area the remains of these stores can be used for egg formation, insurance against poor feeding ...
Klaassen, Raymond +11 more
core +2 more sources
Journal of King Saud University: Computer and Information Sciences, 2023 As COVID-19 is still spreading globally, the narrow ship space makes COVID-19 easier for the virus to infect ship passengers. Tracking close contacts remains an effective way to reduce the risk of virus transmission.
Qianfeng Lin +2 more
doaj +1 more source
Radio Interferometric Angle of Arrival Estimation [PDF]
, 2010 Several localization algorithms exist for wireless sensor networks that use angle of arrival measurements to estimate node position. However, there are limited options for actually obtaining the angle of arrival using resource-constrained devices. In this paper, we describe a radio interferometric technique for determining bearings from an anchor node ...
Isaac Amundson +3 more
openaire +2 more sources
Calpain small subunit homodimerization is robust and calcium‐independent
FEBS Letters, EarlyView.Calpains dimerize via penta‐EF‐hand (PEF) domains. Using single‐molecule force spectroscopy, we measured the strength and kinetics of PEF–PEF homodimer binding. The interaction is robust, shows a transient conformational step before dissociation, and remains largely insensitive to Ca2+.
Nesha May O. Andoy +4 more
wiley +1 more source
A Simple Cross Correlation Switched Beam System (XSBS) for Angle of Arrival Estimation
IEEE Access, 2017 We propose a practical, simple and hardware friendly, yet novel and efficient, angle of arrival (AoA) estimation system. Our intuitive, two-phases cross-correlation-based system requires a switched beam antenna array with a single radio frequency ...
Ahmed Badawy +4 more
doaj +1 more source