Title:

A wideband smart antenna employing spatial signal processing, Journal of Telecommunications and Information Technology, 2007, nr 1

Creator:

Uthansakul, Monthippa ; Bialkowski, Marek E.

Subject and Keywords:

wideband smart antenna ; direction estimation ; wideband antenna ; wideband beamforming ; null steering

Description:

A smart antenna with capability of beam steering in azimuth over a wide frequency band using only spatial signal processing is presented. Filters and tapped-delay networks employed in conventional wideband linear arrays are avoided by using a two-dimensional rectangular array structure. In this array, only constant real-valued weighting coefficients, realized with amplifiers or attenuators, are used to form a desired radiation pattern. In order to estimate direction of arrival of a wideband signal, the MUSIC algorithm in conjunction with an interpolated array technique is applied. In the interpolated array technique, a composite covariance matrix is generated, which is a simple addition of covariance matrices of narrowband virtual arrays, being stretched or compressed versions of a nominal array. A working prototype of this wideband array is presented. Its operation is assessed via full EM simulations and measurements.

Publisher:

Instytut Łączności - Państwowy Instytut Badawczy, Warszawa

Date:

2007, nr 1

Resource Type:

artykuł

Format:

application/pdf

Resource Identifier:

ISSN 1509-4553, on-line: ISSN 1899-8852

Source:

Journal of Telecommunications and Information Technology

Language:

ang

Rights Management:

Biblioteka Naukowa Instytutu Łączności