TY - GEN
T1 - Localization enhancement by additional nodes in wireless networks
AU - Weiss, Anthony J.
AU - Picard, Joseph S.
PY - 2007
Y1 - 2007
N2 - Next generation mobile networks frequently offer services and applications that require the stations position. It is well known that adding nodes to an existing wireless network enhances the localization accuracy of the network nodes. We exploit a recent compact expression of the Cramér-Rao bound to identify the nodes whose localization is improved. Further, we define the exact conditions for error reduction. In particular, in a planar network, an additional node must have at least three connections, not all of them to anchors, to affect the accuracy. We also show that the accuracy improvement is limited by a bound, which is independent of the number of additional nodes. Finally, we provide numerical examples that shed some light on the accuracy improvement.
AB - Next generation mobile networks frequently offer services and applications that require the stations position. It is well known that adding nodes to an existing wireless network enhances the localization accuracy of the network nodes. We exploit a recent compact expression of the Cramér-Rao bound to identify the nodes whose localization is improved. Further, we define the exact conditions for error reduction. In particular, in a planar network, an additional node must have at least three connections, not all of them to anchors, to affect the accuracy. We also show that the accuracy improvement is limited by a bound, which is independent of the number of additional nodes. Finally, we provide numerical examples that shed some light on the accuracy improvement.
KW - Ad-hoc mobile networks
KW - Location estimation
KW - Maximum likelihood estimation
KW - Wireless sensor network
UR - http://www.scopus.com/inward/record.url?scp=46749104822&partnerID=8YFLogxK
U2 - 10.1109/ISCIT.2007.4392138
DO - 10.1109/ISCIT.2007.4392138
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AN - SCOPUS:46749104822
SN - 1424409772
SN - 9781424409778
T3 - ISCIT 2007 - 2007 International Symposium on Communications and Information Technologies Proceedings
SP - 871
EP - 875
BT - ISCIT 2007 - 2007 International Symposium on Communications and Information Technologies Proceedings
T2 - ISCIT 2007 - 2007 International Symposium on Communications and Information Technologies
Y2 - 16 October 2007 through 19 October 2007
ER -