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Fundamental Limitations for DOA Estimation by a Sphere

Publiceringsår: 2004
Språk: Engelska
Sidor: 26
Publikation/Tidskrift/Serie: Technical Report LUTEDX/(TEAT-7128)/1-26/(2004)
Dokumenttyp: Rapport


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

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