Title :
Robust symmetrical number system direction finding arrays with virtual spacing
Author :
Kwai, K.W. ; Pace, P.E. ; Jenn, D.C. ; Chen, J.C.
Author_Institution :
Naval Postgrad. Sch., Monterey, CA
Abstract :
This research demonstrated how RSNS mapping is used to obtain unambiguous AOA estimates directly from phase measurements from the array elements. It is also possible to use the measured phases from elements with fixed spacing to simulate a nonphysical dasiavirtualpsila array with different element spacing. In order to apply the RSNS algorithm there are restrictions on the selected virtual array moduli. The virtual interferometers can be used to increase the resolution of a DF system over a limited spatial sector. Monte Carlo simulations have included thermal noise, channel errors, frequency errors and spacing errors [Kwai, 2007 and Pace, 2001]. The virtual array processing generally requires a higher SNR due to the higher resolution. The logical implementation of the RSNS is to use a coarse resolution for low SNR and switch to higher resolutions as the SNR increases [Chen, 2004].
Keywords :
Monte Carlo methods; antenna arrays; direction-of-arrival estimation; directive antennas; electronic warfare; interferometers; phase measurement; radio direction-finding; Monte Carlo simulations; angle of arrival estimation; array elements; channel errors; frequency errors; phase measurements; robust symmetrical number system direction finding arrays; robust symmetrical number system mapping; spacing errors; thermal noise; virtual array moduli; virtual interferometers; virtual spacing; Array signal processing; Frequency; Interferometers; Phase estimation; Phase measurement; Phased arrays; Robustness; Signal to noise ratio; Spatial resolution; Switches;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2008. AP-S 2008. IEEE
Conference_Location :
San Diego, CA
Print_ISBN :
978-1-4244-2041-4
Electronic_ISBN :
978-1-4244-2042-1
DOI :
10.1109/APS.2008.4619383
