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1. (WO2013156065) AN ANTENNA ARRANGEMENT FOR DOA ESTIMATION

Pub. No.:    WO/2013/156065    International Application No.:    PCT/EP2012/057070
Publication Date: Fri Oct 25 01:59:59 CEST 2013 International Filing Date: Thu Apr 19 01:59:59 CEST 2012
IPC: G01S 3/38
G01S 3/04
H01Q 3/22
Applicants: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
NILSSON, Andreas
ATHLEY, Fredrik
Inventors: NILSSON, Andreas
ATHLEY, Fredrik
Title: AN ANTENNA ARRANGEMENT FOR DOA ESTIMATION
Abstract:
The present invention relates to an antenna arrangement (1) comprising at least two antenna functions (2, 3, 4, 5) arranged to cover a certain angular sector (6). Each antenna function (2, 3, 4, 5) comprises a corresponding antenna port. The antenna arrangement (1) is arranged to perform a first direction of arrival, DOA, estimation for a transmitting device (12) at a first frequency (f1). The antenna arrangement (1) is furthermore arranged to perform a second DOA estimation for the transmitting device (12) at a second frequency (f2), the second frequency (f2) being of larger magnitude than the first frequency (f1). At least one second frequency grating lobe (13, 14; 31, 32, 33, 34, 35, 36) is apparent in the angular sector (6) at the second frequency (f2). The antenna arrangement (1) is arranged to separate said second frequency grating lobe (13, 14; 31, 32, 33, 34, 35, 36) from a second frequency main lobe (15, 15') by means of results from the first DOA estimation, a pointing direction (17, 17') of the second frequency main lobe (15, 15') forming a resulting DOA estimation. The present invention also relates to a corresponding method.