TY - GEN
T1 - Maximum likelihood localization of wideband sources
AU - Doron, Miriam A.
AU - Weiss, Anthony J.
N1 - Publisher Copyright:
© 1992 IEEE.
PY - 1992
Y1 - 1992
N2 - In this paper we examine the Gaussian and deterministic ML DOA estimates for several cases of a-priori noise statistics. We compare the structure of the Gaussian and the deterministic log-likelihood functions are show that for unknown noise spectrum, both estimators minimize the entropy of the measurements. We also shown that the Gaussian log-likelihood function includes an additional term, which is the entropy of the projection of the measurements onto the signal-subspace. We derive General conditions under which the deterministic ML estimate is also an extremum of the Gaussian likelihood function and shown that the asymptotic (large K) limit of these conditions guarantees equal asymptotic performances. We also shown that the asymptotic performance is not affected by prior knowledge of the noise spectrum.
AB - In this paper we examine the Gaussian and deterministic ML DOA estimates for several cases of a-priori noise statistics. We compare the structure of the Gaussian and the deterministic log-likelihood functions are show that for unknown noise spectrum, both estimators minimize the entropy of the measurements. We also shown that the Gaussian log-likelihood function includes an additional term, which is the entropy of the projection of the measurements onto the signal-subspace. We derive General conditions under which the deterministic ML estimate is also an extremum of the Gaussian likelihood function and shown that the asymptotic (large K) limit of these conditions guarantees equal asymptotic performances. We also shown that the asymptotic performance is not affected by prior knowledge of the noise spectrum.
UR - http://www.scopus.com/inward/record.url?scp=84928727723&partnerID=8YFLogxK
U2 - 10.1109/ICASSP.1992.226013
DO - 10.1109/ICASSP.1992.226013
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AN - SCOPUS:84928727723
T3 - ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
SP - 489
EP - 492
BT - ICASSP 1992 - 1992 International Conference on Acoustics, Speech, and Signal Processing
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 1992 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 1992
Y2 - 23 March 1992 through 26 March 1992
ER -