Title :
Cramer-Rao Bound for Clock Drift in UWB Ranging Systems
Author :
D´Amico, Antonio A. ; Mengali, U. ; Taponecco, Lorenzo
Author_Institution :
Dept. of Inf. Eng., Univ. of Pisa, Pisa, Italy
Abstract :
This correspondence computes the Cramer-Rao lower bound on the variance of frequency drift estimates in oscillators for UWB ranging applications. An indoor multipath channel is assumed but, unlike previous investigations, the received pulses are not taken as separate from each other. Overlaps are possible and are accounted for. A simple formula is derived for the bound, which neatly shows its dependence on the channel parameters and the pulse shape. Comparisons are made with the case of separable pulses.
Keywords :
ultra wideband communication; Cramer-Rao bound; UWB ranging applications; channel parameters; clock drift; frequency drift; indoor multipath channel; pulse shape; ultrawide bandwidth impulse-radio; Clocks; Cramer-Rao bounds; Distance measurement; Probability density function; Shape; Wireless communication; Cramer-Rao bounds; UWB ranging methods; clock drift estimation;
Journal_Title :
Wireless Communications Letters, IEEE
DOI :
10.1109/WCL.2013.080813.130424
