Communications: directive radio wave systems and devices (e.g. – Directive – Position indicating
Reexamination Certificate
2007-07-24
2007-07-24
Phan, Dao L. (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Directive
Position indicating
Reexamination Certificate
active
11146647
ABSTRACT:
In order to improve the reliability and the accuracy of a position-finding method such as the GPS method, the quality of a radio link which is used for the position-finding method is determined by estimating a parameter, in particular the Rice factor of the amplitude distribution density, which is characteristic of the ratio of the strength of a signal transmitted via a line-of-sight path, with respect to the strength of the signals transmitted via non-line-of-sight paths.
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patent: 2002/0033766 (2002-03-01), Pratt
patent: 2003/0114170 (2003-06-01), Rick et al.
patent: 2003/0220117 (2003-11-01), Duffett-Smith et al.
“Moment-Method Estimation of the Ricean K-Factor”, L.J. Greenstein, D.G. Michelson and V. Erceg, IEEE Communications Letters, vol. 3, No. 6, Jun. 1999, 3 pgs.
“The Ricean K Factor: Estimation and Performance Analysis”, Cihan Tepedelenlio{hacek over (g)}iu, Ali Abdi and Georgios B. Giannakis, IEEE Transactions on Wireless Communications, vol. 2, No. 4, Jul. 2003, 13 pgs.
Neubauer Andre
Schmid Andreas
Eschweiler & Associates LLC
Infineon - Technologies AG
Phan Dao L.
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