TY - JOUR
T1 - Localization of a distributed source which is `partially coherent' - modeling and Cramer Rao bounds
AU - Raich, Raviv
AU - Goldberg, Jason
AU - Messer, Hagit
PY - 1999
Y1 - 1999
N2 - The problem of using antenna array measurements to estimate the bearing of a mobile communications user surrounded by local scatterers is considered. The concept of `partial coherence' is introduced to account for the temporal as well as spatial correlation effects often encountered in mobile radio propagation channels. A simple, intuitive parametric model for temporal channel correlation is presented. The result is an overall spatiotemporal channel model which is more realistic than formerly proposed models (which assume either full or zero temporal channel correlation). Thus, previously posed bearing estimation problems for a `distributed' or `scattered' source are generalized to a joint spatiotemporal parameter estimation problem. A study of the associated Cramer-Rao Bound for the case of known transmitted signal of constant modulus indicates that the inherent accuracy limitations associated with this generalized problem lie somewhere between the cases of zero and full temporal correlation and become more severe as temporal channel correlation increases.
AB - The problem of using antenna array measurements to estimate the bearing of a mobile communications user surrounded by local scatterers is considered. The concept of `partial coherence' is introduced to account for the temporal as well as spatial correlation effects often encountered in mobile radio propagation channels. A simple, intuitive parametric model for temporal channel correlation is presented. The result is an overall spatiotemporal channel model which is more realistic than formerly proposed models (which assume either full or zero temporal channel correlation). Thus, previously posed bearing estimation problems for a `distributed' or `scattered' source are generalized to a joint spatiotemporal parameter estimation problem. A study of the associated Cramer-Rao Bound for the case of known transmitted signal of constant modulus indicates that the inherent accuracy limitations associated with this generalized problem lie somewhere between the cases of zero and full temporal correlation and become more severe as temporal channel correlation increases.
UR - http://www.scopus.com/inward/record.url?scp=0032636792&partnerID=8YFLogxK
U2 - 10.1109/icassp.1999.761379
DO - 10.1109/icassp.1999.761379
M3 - ???researchoutput.researchoutputtypes.contributiontojournal.conferencearticle???
AN - SCOPUS:0032636792
SN - 0736-7791
VL - 5
SP - 2941
EP - 2944
JO - Proceedings - ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing
JF - Proceedings - ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing
T2 - Proceedings of the 1999 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP-99)
Y2 - 15 March 1999 through 19 March 1999
ER -