Title :
Bounds and Tradeoffs for Cooperative DoA-Only Localization of Primary Users
Author :
Penna, Federico ; Cabric, Danijela
Author_Institution :
Politec. di Torino, Torino, Italy
Abstract :
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?
Keywords :
antenna arrays; cognitive radio; direction-of-arrival estimation; wireless channels; Cramer Rao bound; array-specific parameters; cognitive radio networks; cooperative DoA-only localization; direction-of-arrival-based localization; localization error; multiple antenna array; position estimation; primary users; propagation channel; virtual antenna arrays; Antenna arrays; Direction of arrival estimation; Estimation; Sensor arrays; Signal to noise ratio;
Conference_Titel :
Global Telecommunications Conference (GLOBECOM 2011), 2011 IEEE
Conference_Location :
Houston, TX, USA
Print_ISBN :
978-1-4244-9266-4
Electronic_ISBN :
1930-529X
DOI :
10.1109/GLOCOM.2011.6134232