Spatial Resolutions of the Broadband Nonredundant and Minimum Redundancy Arrays

Author

Duan, Huiping ; Ng, Boon Poh ; See, Chong Meng Samson ; Fang, Jun

Author_Institution

Nanyang Technol. Univ., Singapore

Volume

14

Issue

11

fYear

2007

Firstpage

852

Lastpage

855

Abstract

Approximate formulations for the 3-dB beamwidth are derived in this letter to measure the spatial resolution of the broadband nonredundant array (NRA) and minimum redundancy array (MRA), which assume the ideal continuous-time, infinite-length filters with the frequency responses obtained by the linearly constrained minimum variance (LCMV) optimization. By these formulations, the beamwidths of NRA and MRA are compared with that of the uniform linear array (ULA). Moreover, the accuracy of the derived formulations is assessed by numerical studies.

Keywords

array signal processing; continuous time filters; filtering theory; optimisation; signal resolution; broadband nonredundant array; continuous-time infinite-length filters; linearly constrained minimum variance optimization; minimum redundancy arrays; spatial resolutions; Adaptive arrays; Constraint optimization; Filters; Frequency measurement; Geometry; Narrowband; Sensor arrays; Signal resolution; Spatial resolution; Speech; Broadband array; adaptive beamformer; minimum redundancy array (MRA); nonredundant array (NRA); spatial resolution; uniform linear array (ULA);

fLanguage

English

Journal_Title

Signal Processing Letters, IEEE

Publisher

ieee

ISSN

1070-9908

Type

jour

DOI

10.1109/LSP.2007.899335

Filename

4351944