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Bounds and Tradeoffs for Cooperative DoA-Only Localization of Primary Users

: Penna, F.; Cabric, D.


IEEE Communications Society:
IEEE Global Telecommunications Conference, GLOBECOM 2011 : 5 - 9 Dec. 2011, Houston
Piscataway: IEEE, 2011
ISBN: 978-1-4244-9266-4
ISBN: 978-1-4244-9268-8
ISBN: 978-1-4244-9267-1
5 S.
Global Telecommunications Conference <54, 2011, Houston/Tex.>
Fraunhofer HHI ()

Direction-of-arrival (DoA)-based localization is a suitable approach for estimating the position of primary users in cognitive radio networks, as it does not require knowledge of transmission power or propagation channel. In this paper we consider a scenario where secondary users obtain DoA estimates by multiple antennas or virtual antenna arrays. We express the Cramer Rao bound of the localization error as a function of the problem geometry and of array-specific parameters. Then, we investigate how the bound scales with the number of sensors and the number of antennas per sensor, and we address the following question: is it better to have more sensors with fewer antennas, or fewer sensors with more antennas?