Results 21 to 30 of about 28,716 (250)

A Survey of Latest Wi-Fi Assisted Indoor Positioning on Different Principles

open access: yesSensors, 2023
As the location-based service (LBS) plays an increasingly important role in real life, the topic of positioning attracts more and more attention. Under different environments and principles, researchers have proposed a series of positioning schemes and ...
Jihan Dai   +4 more
doaj   +1 more source

Radio Interferometric Angle of Arrival Estimation [PDF]

open access: yes, 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   +1 more source

Fast Joint Estimation of Time of Arrival and Angle of Arrival in Complex Multipath Environment Using OFDM

open access: yesIEEE Access, 2018
Joint time of arrival (TOA) and angle of arrival (AOA) estimation based on a uniform circle array (UCA) involves problems, including high computational complexity in the multi-dimensional spectral search method and lack of applicability in coherent ...
Haiyun Xu   +4 more
doaj   +1 more source

Self-Localization via Circular Bluetooth 5.1 Antenna Array Receiver

open access: yesIEEE Access, 2023
Future telecommunications aim to be ubiquitous and efficient, as widely deployed connectivity will allow for a variety of edge/fog based services. Challenges are numerous, e.g., spectrum overuse, energy efficiency, latency and bandwidth, battery life and
Nuno Paulino, Luis M. Pessoa
doaj   +1 more source

Practical 3-D Beam Pattern Based Channel Modeling for Multi-Polarized Massive MIMO Systems

open access: yesSensors, 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

Two Dimensional Angle of Arrival Estimation

open access: yesCoRR, 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

Direct Position Determination of Multiple Radio Signals

open access: yesEURASIP 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

open access: yesICT Express
In 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
doaj   +1 more source

An Angle Recognition Algorithm for Tracking Moving Targets Using WiFi Signals with Adaptive Spatiotemporal Clustering

open access: yesSensors, 2021
An angle estimation algorithm for tracking indoor moving targets with WiFi is proposed. First, phase calibration and static path elimination are proposed and performed on the collected channel state information signals from different antennas.
Liping Tian   +3 more
doaj   +1 more source

RFID Localization Using Angle of Arrival Cluster Forming

open access: yesInternational 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

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