Title :
Approximated CRB for Multipath Time Delay Estimator Problem in Low SNR Condition
Author :
Bhardwaj, Tarkeshwar Prasad ; Nath, Ravinder
Author_Institution :
Dept. of Electr. Eng., Nat. Inst. of Technol., Hamirpur
Abstract :
In this paper, we present the approximated CRB for time delay estimator in multipath channel operating at low SNR ranges. In general, evaluation of true CRB is difficult to obtain. Instead, here we derive a simple closed form expression, which is an approximation of true CRB, at low SNR ranges. The computation of this approximated CRB involves less complexity and is reasonably accurate.
Keywords :
approximation theory; delays; multipath channels; Cramer-Rao bound; Fisher information matrix; approximated CRB; multipath channel; multipath time delay estimator problem; power spectral density; Attenuation; Delay effects; Delay estimation; Fading; Multipath channels; Power system modeling; Sensor systems and applications; Signal generators; Wireless communication; Wireless sensor networks; Cramer-Rao Bound (CRB); Fisher Information Matrix; Multipath; Power Spectral Density (PSD);
Conference_Titel :
Advance Computing Conference, 2009. IACC 2009. IEEE International
Conference_Location :
Patiala
Print_ISBN :
978-1-4244-2927-1
Electronic_ISBN :
978-1-4244-2928-8
DOI :
10.1109/IADCC.2009.4809174
