Title :
Performance bounds for target identification using decay rates estimates from EMI measurements
Author :
Tantum, Stacy L. ; Collins, Leslie M.
Author_Institution :
Dept. of Electr. & Comput. Eng., Duke Univ., Durham, NC, USA
Abstract :
Decay rate estimation has been proposed as an effective method for landmine and unexploded ordnance (UXO) detection. The physical basis for this strategy is that every object in the target library possesses a unique set of decay rates. In theory, the characteristic decay rates can be estimated from the measured electromagnetic induction (EMI) response, and then utilized for target detection and subsequent identification. Unfortunately, decay rate estimation is notoriously difficult and this difficulty adversely impacts target identification performance. Since the basis for this approach to target detection and identification is that targets are uniquely characterized by their decay rates, discrimination performance is dependent upon decay rate estimation performance. The Cramer-Rao lower bound (CRLB) for decay rate and amplitude coefficient estimates is utilized to investigate the fundamental limitations on target identification via decay rate estimation. It is shown how both the temporal sampling strategy and the number of poles being estimated affects pole estimation and target identification performance
Keywords :
buried object detection; electromagnetic induction; geophysical techniques; military radar; military systems; radar detection; terrain mapping; terrestrial electricity; Cramer-Rao lower bound; EM induction; EMI response; amplitude coefficient; buried object detection; decay rate; electromagnetic induction; estimation; geoelectric method; geophysical measurement technique; landmine; mine detection; performance bound; pole estimation; target identification; terrestrial electricity; unexploded ordnance; Amplitude estimation; Electric variables measurement; Electromagnetic induction; Electromagnetic interference; Electromagnetic measurements; Landmine detection; Libraries; Object detection; Q measurement; Time measurement;
Conference_Titel :
Geoscience and Remote Sensing Symposium, 2000. Proceedings. IGARSS 2000. IEEE 2000 International
Conference_Location :
Honolulu, HI
Print_ISBN :
0-7803-6359-0
DOI :
10.1109/IGARSS.2000.858381