Title :
The Cramer-Rao bounds of hybrid TOA/RSS and TDOA/RSS location estimation schemes
Author :
Catovic, Amer ; Sahinoglu, Zafer
Author_Institution :
Network Planning Dept., Bechtel Telecommun., Frederick, MA, USA
Abstract :
The Cramer-Rao bound (CRB) on location estimation accuracy of two different hybrid schemes, time of arrival/received signal strength (TOA/RSS) and time difference of arrival/received signal strength (TDOA/RSS), is computed. For short-range networks, the hybrid schemes offer improved accuracy with respect to conventional TOA and TDOA schemes, particularly in the proximity of the reference devices.
Keywords :
direction-of-arrival estimation; radio tracking; wireless sensor networks; Cramer-Rao bounds; TDOA/RSS; hybrid TOA/RSS; location estimation accuracy; short-range networks; time difference of arrival/received signal strength scheme; time of arrival/received signal strength scheme; Base stations; Land mobile radio cellular systems; Monitoring; Random variables; Sensor phenomena and characterization; Time difference of arrival; Tin; Wireless communication; Wireless sensor networks; ZigBee; CRB; Cramer–Rao Bound; WSN; location estimation; short range networks; wireless sensor networks;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2004.835319
