Title :
Weak interference direction of arrival estimation in the GPS L1 frequency band
Author :
Zili Xu ; Trinkle, Matthew ; Gray, Douglas A.
Author_Institution :
Sch. of Electr. & Electron. Eng., Univ. of Adelaide, Adelaide, SA, Australia
Abstract :
Due to its low received power, a GPS signal is vulnerable to both intentional and unintentional interferences. In this paper, the problem of estimating the direction of arrival of a weak GPS interference, which has the same power level as the GPS signals or is even weaker than them, using a GPS antenna array is considered. To achieve this, a multiple subspace projection algorithm is proposed to cancel GPS signals which are treated as relatively strong interfering sources. Comparisons with the Partitioned Subspace Projection (PSP) method are presented using simulations. Experimental results show that the DOA of an interference with an SNR of -20dB in the GPS L1 band can be accurately estimated1.
Keywords :
antenna arrays; direction-of-arrival estimation; interference (signal); GPS L1 frequency band; GPS antenna array; multiple subspace projection algorithm; partitioned subspace projection method; weak interference direction of arrival estimation; Arrays; Delays; Direction-of-arrival estimation; Estimation; Finite impulse response filters; Global Positioning System; Interference; DOA; GPS interference; antenna array; subspace projection;
Conference_Titel :
Acoustics, Speech and Signal Processing (ICASSP), 2015 IEEE International Conference on
Conference_Location :
South Brisbane, QLD
DOI :
10.1109/ICASSP.2015.7178451