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Fundamental Limitations for DOA Estimation by a Sphere

Publiceringsår: 2004
Språk: Engelska
Publikation/Tidskrift/Serie: Technical Report LUTEDX/(TEAT-7128)/1-26/(2004)
Volym: TEAT-7128
Dokumenttyp: Rapport
Förlag: [Publisher information missing]


In this paper we consider fundamental limitations for DOA estimation with

arbitrary lossless antennas or antenna arrays inserted inside a sphere. Spherical

vector modes and their associated equivalent circuits and Q factor approximations

are employed as a general framework for the analysis. The

classical broadband matching theory by Fano is extended to a general multiport

S–parameter model of the antennas and fundamental bounds are given

for the scattering parameters with respect to bandwidth and electrical size

of the sphere. Finally, assuming a statistical signal model with Gaussian

receiver noise, the Cramer–Rao lower bound is used to derive fundamental

upper bounds for the performance of DOA estimation by a sphere.


  • Electrical Engineering, Electronic Engineering, Information Engineering


  • Electromagnetic theory-lup-obsolete

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