TY - GEN
T1 - Multiple scattering effects on the localization of two point scatterers
AU - Shi, Gang
AU - Nehorai, Arye
AU - Liu, Hongwei
AU - Chen, Bo
AU - Wang, Yuehai
N1 - Funding Information:
The work of G. Shi was supported by Xidian University Grant No. 7215616803, the work of A. Nehorai was supported by AFOSR Grant No. FA9550-11-1-0210.
Publisher Copyright:
© 2016 IEEE.
PY - 2016/5/18
Y1 - 2016/5/18
N2 - Multiple scattering effects are commonly ignored in the detection and estimation of scatterers in signal processing research, because the energy of the first-order scattering is much larger than that of higher-order components. Although multiple scattering can significantly increase the estimation precision of point scatterers, it does not always lead to an improvement. Identifying conditions under which multiple scattering is beneficial or detrimental to estimation in a general setup is still an open problem. In this paper, we consider the effects of multiple scattering on the localization of two point scatterers. By comparing the Fisher information matrix on location parameters when multiple scattering exists and does not exist, we show analytically that information on ranges can benefit estimating directions of arrival via multiple scattering when the two scatterers are in far-field and well resolved.
AB - Multiple scattering effects are commonly ignored in the detection and estimation of scatterers in signal processing research, because the energy of the first-order scattering is much larger than that of higher-order components. Although multiple scattering can significantly increase the estimation precision of point scatterers, it does not always lead to an improvement. Identifying conditions under which multiple scattering is beneficial or detrimental to estimation in a general setup is still an open problem. In this paper, we consider the effects of multiple scattering on the localization of two point scatterers. By comparing the Fisher information matrix on location parameters when multiple scattering exists and does not exist, we show analytically that information on ranges can benefit estimating directions of arrival via multiple scattering when the two scatterers are in far-field and well resolved.
KW - Artificial Scatterer
KW - Cramer-Rao Bound
KW - Estimation
KW - Fisher Information
KW - Multiple Scattering
UR - http://www.scopus.com/inward/record.url?scp=84973364180&partnerID=8YFLogxK
U2 - 10.1109/ICASSP.2016.7472253
DO - 10.1109/ICASSP.2016.7472253
M3 - Conference contribution
AN - SCOPUS:84973364180
T3 - ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
SP - 3126
EP - 3130
BT - 2016 IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP 2016 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 41st IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP 2016
Y2 - 20 March 2016 through 25 March 2016
ER -