Results 171 to 180 of about 166,346,949 (214)

Pulsar navigation using time of arrival (TOA) and time differential TOA (TDTOA)

Acta Astronautica, 2018
Abstract Pulsar navigation is a novel autonomous navigation method for deep-space missions. The pulsar navigation method using the time of arrival (TOA) determines the absolute position of the spacecraft. However, its accuracy is greatly affected by system errors, including the ephemeris error of the pulsar and the satellite-borne clock error.
Ning Xiaolin, Yang Yuqing, Gui Mingzhen, Wu Weiren, Fang Jiancheng, Liu Gang   +5 more
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Time of arrival (TOA)-based direct location method

2015 16th International Radar Symposium (IRS), 2015
The presented direct location method computes the 3D position of an object using exactly four time-of-arrival (TOA) measurements, i.e. range measurements, to four reference points or stations. This operation is also commonly known as multilateration. Traditionally, this problem can also be solved using three TOA measurements to three reference stations,
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Improvement in estimation of time of arrival (TOA) from timing advance (TA)

ICUPC '98. IEEE 1998 International Conference on Universal Personal Communications. Conference Proceedings (Cat. No.98TH8384), 2002
Wireless systems reporting TOA (time of arrival), the propagation time from the mobile station (MS) to the base station (BS), may use this information to assist with automatic location identification (ALI). The TA (timing advance), used in TDMA systems, may be used as an approximation for TOA.
G.P. Yost, S. Panchapakesan
openaire   +1 more source

Simulation of Lightning Flash in Time of Arrival (TOA) Method by Using Three Broadband Antennas

2011 UKSim 5th European Symposium on Computer Modeling and Simulation, 2011
Various methods are used to locate cloud-to-ground lightning flash. The accuracy of the methods depends on the number of sensor stations, station topology, mathematical model adopted for the analyses, and type of measuring equipment. For a single station with the configuration of short baseline in a measuring system, the accuracy analysis is mostly ...
Saeed Vahabi Mashak, Hadi Nabipour Afrouzi, Zulkurnain Abdul-Malek   +2 more
openaire   +1 more source

Estimation of Channel State Information (CSI) in Cell-Free Massive MIMO Based on Time of Arrival (ToA)

Wireless Personal Communications, 2020
Cell-free massive multiple input multiple output (MIMO) comprises a large number of distributed single antenna access points (APs) connected to a network controller through backhaul. Each user is served by neighbouring APs simultaneously. Cell-free Massive MIMO provides decent throughput and coverage improvement as compared to a small-cell.
Aqiel N. Almamori, Seshadri Mohan
openaire   +2 more sources

CME-learn: An interactive playground to benchmark CME databases for the time of arrival (ToA) prediction for using machine learning methods.

2022
<p>Coronal mass ejections are one of the most significant drivers of space weather. The ToA predictions along with the Arrival speed of the CMEs are one of the crucial pieces of information for preparing for the possible geomagnetic storms.
Ajay Tiwari, Enrico Camporeale, Dario Del Moro, Raffaello Foldes, Gianluca Napoletano, Giancarlo de Gasperis, Jannis Teunissen   +6 more
openaire   +1 more source

An underwater sensor network localization algorithm based on Time-of-Arrivals (TOAs)

2013 Ninth International Conference on Natural Computation (ICNC), 2013
The underwater sensor network localization algorithm is one of the very important steps in the underwater sensor network initialization process. Due to the deployment of environmental constraints, the underwater sensor node can only be indirectly localized by calculation.
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Time-of-arrival (TOA) estimation based structured sparse channel estimation algorithm, with applications to digital TV receivers

2003 IEEE International Conference on Acoustics, Speech, and Signal Processing, 2003. Proceedings. (ICASSP '03)., 2004
We introduce a new structured channel impulse response (CIR) estimation method for sparse multipath channels where we demonstrate a robust way of restoring the pulse shape into the composite CIR. We call this novel CIR estimation method time-of-arrival based blended least squares (TOA-BLS) which uses symbol rate sampled signals, and it is based on ...
Serdar Özen, Michael D. Zoltowski
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Structured channel estimation algorithm based on estimating the time-of-arrivals (TOAs), with applications to digital TV receivers

SPIE Proceedings, 2003
In this paper we introduce a new structured channel impulse response (CIR) estimation method for sparse multipath channels. We call this novel CIR estimation method Time-Of-Arrival based Blended Least Squares (TOA-BLS) which uses symbol rate sampled signals, based on blending the least squares based channel estimation and the correlation and cleaning
Serdar Ozen, Michael D. Zoltowski
openaire   +1 more source

A Novel Pilot Aided Time of Arrival (TOA) Estimation Algorithm for Vehicular OFDM Systems in Specular Wireless Channels

2008 IEEE Globecom Workshops, 2008
Channel estimation is vital for implementing schemes such as coherent detection and adaptive bit loading, which make OFDM an attractive PHY layer technology for vehicular wireless communications. However, knowledge of the exact time of arrival (TOA) information of the multi-path components of the vehicular wireless channel is required to achieve ...
Vinay Uday Prabhu, Devendra Jalihal
openaire   +1 more source