@inproceedings{6bd962756e144afab529b53d09c1f25b,
title = "Multichannel broadband Fano theory for arbitrary lossless antennas with applications in DOA estimation",
abstract = "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.",
keywords = "equivalent circuits, multiport networks, impedance matching, direction-of-arrival estimation, array signal processing, antenna arrays, Gaussian noise, S-parameters, Q-factor",
author = "Sven Nordebo and Mats Gustafsson",
year = "2005",
doi = "10.1109/ICASSP.2005.1416172",
language = "English",
isbn = "0-7803-8874-7",
volume = "4",
publisher = "IEEE - Institute of Electrical and Electronics Engineers Inc.",
pages = "969--972",
booktitle = "Proceedings IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP '05)",
address = "United States",
note = "2005 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), ICASSP '05 ; Conference date: 18-03-2005 Through 23-03-2005",
}