Superresolution effects in broadband antenna arrays

Author

Nordholm, S. ; Claesson, I. ; Eriksson, P.

Author_Institution

Lund Univ., Sweden

fYear

1990

fDate

7-11 May 1990

Firstpage

1462

Abstract

The problem of finding the angular 3-dB beamwidth for a wideband Griffiths-Jim adaptive beamformer is discussed. Approximate analytic expressions are presented and their relation to the Cramer-Rao bound (CRB) is considered. Results on the CRB in direction of arrival estimation for a sinusoidal signal are extended to narrowband and broadband signals, together with simple interpretations of their behavior. Superresolution results with a five-element array for three target signal bandwidths (400-2000, 800-1600, and 1120-1280 Hz) are presented.<>

Keywords

antenna phased arrays; parameter estimation; signal processing; 160 Hz; 1600 Hz; 400 to 2000 Hz; 800 Hz; Cramer-Rao bound; Griffiths-Jim adaptive beamformer; angular beamwidth; array processing; broadband antenna arrays; broadband signals; direction of arrival estimation; narrowband signals; signal processing; sinusoidal signal; superresolution effects; target signal bandwidths; Adaptive arrays; Antenna arrays; Broadband antennas; Direction of arrival estimation; Filters; Frequency domain analysis; Frequency estimation; Narrowband; Sensor arrays; Signal resolution;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium, 1990. AP-S. Merging Technologies for the 90's. Digest.

Conference_Location

Dallas, TX, USA

Type

conf

DOI

10.1109/APS.1990.115390

Filename

115390