Aliasing, Ambiguities, and Interpolation in Wideband Direction-of-Arrival Estimation Using Antenna Arrays

Autor/in	Ho, Chung-Cheng
Titel	Aliasing, Ambiguities, and Interpolation in Wideband Direction-of-Arrival Estimation Using Antenna Arrays
Quelle	(2016), (137 Seiten) PDF als Volltext Verfügbarkeit Ph.D. Dissertation, Southern Methodist University
Sprache	englisch
Dokumenttyp	gedruckt; online; Monographie
ISBN	978-0-3551-7061-0
Schlagwörter	Hochschulschrift; Dissertation; Electronic Equipment; Navigation; Clinical Diagnosis; Geographic Location; Accuracy; Computation; Diagnostic Tests + Suchen Sie Ihr Suchwort? Thesis; Dissertations; Academic thesis; Elektronisches Gerät; Diagnostic test; Diagnostischer Test
Abstract	For decades, direction finding has been an important research topic in many applications such as radar, location services, and medical diagnosis for treatment. For those kinds of applications, the precision of location estimation plays an important role, since that, having a higher precision location estimate method is always desirable. Although there are many ways to achieve high-resolution direction-of-arrival estimation, spatial sensor array signal processing via a subspace-based algorithm, such as Multiple Signal Classification (MUSIC), is one of most important techniques that can achieve very high resolution. However, it requires a large number of steering vectors for fine step DOA searching which increases complexity. Moreover, it often is a problem to find a closed form array response due to the unregulated structure of the array. Beside that, in practical scenarios, there are reasons like shape, size, and other mechanical issues such that well designed regular or symmetric sensor arrays often cannot be mounted in the desired position. When the antenna positions deviate from the places they should be, the array frequency response deviates from the original designed goal too. Because the array response has changed, aliasing and ambiguities may be introduced. Thus, direction estimation can fail due to errors or false alarms. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://www.proquest.com/en-US/products/dissertations/individuals.shtml.] (As Provided).
Anmerkungen	ProQuest LLC. 789 East Eisenhower Parkway, P.O. Box 1346, Ann Arbor, MI 48106. Tel: 800-521-0600; Web site: http://www.proquest.com/en-US/products/dissertations/individuals.shtml
Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2020/1/01