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Least Squares Algorithms for Time of Arrival Based Mobile Source Localization and Time Synchronization in Wireless Sensor Networks

Published on Decmber 2011 by Anita Panwar, Anish Kumar, Sh. Ashok Kumar
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International Conference on Computer Communication and Networks CSI-COMNET-2011
Foundation of Computer Science USA
COMNET - Number 1
Decmber 2011
Authors: Anita Panwar, Anish Kumar, Sh. Ashok Kumar
132f755d-5261-4d6d-83a9-7d97b91847d8

Anita Panwar, Anish Kumar, Sh. Ashok Kumar . Least Squares Algorithms for Time of Arrival Based Mobile Source Localization and Time Synchronization in Wireless Sensor Networks. International Conference on Computer Communication and Networks CSI-COMNET-2011. COMNET, 1 (Decmber 2011), 97-101.

@article{
author = { Anita Panwar, Anish Kumar, Sh. Ashok Kumar },
title = { Least Squares Algorithms for Time of Arrival Based Mobile Source Localization and Time Synchronization in Wireless Sensor Networks },
journal = { International Conference on Computer Communication and Networks CSI-COMNET-2011 },
issue_date = { Decmber 2011 },
volume = { COMNET },
number = { 1 },
month = { Decmber },
year = { 2011 },
issn = 0975-8887,
pages = { 97-101 },
numpages = 5,
url = { /proceedings/comnet/number1/5430-1018/ },
publisher = {Foundation of Computer Science (FCS), NY, USA},
address = {New York, USA}
}
%0 Proceeding Article
%1 International Conference on Computer Communication and Networks CSI-COMNET-2011
%A Anita Panwar
%A Anish Kumar
%A Sh. Ashok Kumar
%T Least Squares Algorithms for Time of Arrival Based Mobile Source Localization and Time Synchronization in Wireless Sensor Networks
%J International Conference on Computer Communication and Networks CSI-COMNET-2011
%@ 0975-8887
%V COMNET
%N 1
%P 97-101
%D 2011
%I International Journal of Computer Applications
Abstract

Accurate source localization and synchronization is of considerable interest in wireless communications. Localization and synchronization are two important issues which are traditionally treated separately in communication systems and wireless sensor networks. In this paper, we present a unified framework to solve these two problems at the same time jointly. Two algorithms are developed for accurate mobile source localization and time synchronization using the time-of-arrival measurements of the signal. The first algorithm, Least Square (LS) estimator, is derived for joint location and timing estimation which is more computationally efficient. The second algorithm is Weighted Least Square for improving estimation accuracy is proposed. For the joint source localization and time synchronization the Cramer-Rao lower bound (CRLB) is also derived.

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Index Terms

Computer Science
Information Sciences

Keywords

Synchronization Cramer-Rao Lower Bound (CRLB) Least Square (LS) estimator Weighted Least Square (WLS)