Superresolution Effects in Broadband Antenna Arrays

• 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 DOA (director of arrival) estimation for a sinusoidal signal are extended to narrowband and broadband signals, together with simple interpretations of their behavior. Superresolution results with five-element array for three target signal bandwidths (400-2000, 800-1600, and 1120-1280 Hz) are presented.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Elektroteknik och elektronik -- Signalbehandling (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Electrical Engineering, Electronic Engineering, Information Engineering -- Signal Processing (hsv//eng)

Nyckelord

Superresolution Effects

Broadband Antenna Arrays

Adaptive Beamformers

Cramer-Rao Bound

Direction of Arrival Estimation

Wideband Griffiths-Jim Adaptive Beamformers

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