Title :
Switched beam antenna design principles for Angle of Arrival estimation
Author :
Giorgetti, G. ; Maddio, S. ; Cidronali, A. ; Gupta, S.K.S. ; Manes, G.
Author_Institution :
IMPACT Lab., Arizona State Univ., Tempe, AZ, USA
Abstract :
Switched beam antennas support radio positioning via angle of arrival (AOA) information collected from nearby devices. Using an analytical approach, first we present the Cramer-Rao bound (CRB) for AOA estimates using identically and equally spaced antenna elements. Then we analyze the results to devise design guidelines for improved AOA estimation. The design parameters considered are: 1) the number of antenna elements, 2) their directivity, and 3) the type of polarization. The effect of each parameter is discussed in detail; additionally, experimental results at 2.45 GHz are reported to evaluate the effect of different antenna polarization on the CRB.
Keywords :
UHF antennas; direction-of-arrival estimation; directive antennas; electromagnetic wave polarisation; radionavigation; AOA estimation; Cramer-Rao bound; angle-of-arrival estimation; antenna directivity; antenna polarization; equally spaced antenna elements; frequency 2.45 GHz; identically spaced antenna elements; radio positioning; switched beam antenna design principles; Antenna measurements; Base stations; Directional antennas; Estimation error; Guidelines; Patch antennas; Polarization; Position measurement; Telecommunication switching; Wireless networks; Angle of Arrival Estimation; CRB; Design; Radio-Positioning; Switched Beam Antenna; Wireless Networks;
Conference_Titel :
Wireless Technology Conference, 2009. EuWIT 2009. European
Conference_Location :
Rome
Print_ISBN :
978-1-4244-4721-3
