Dependence of processing gain and interference immunity of adaptive narrow-band beam-formers on angular locations of interference sources

Author

El Ayadi, M.H.

Author_Institution

Mil. Tech. Coll., Cairo, Egypt

Volume

38

Issue

9

fYear

1990

fDate

9/1/1990 12:00:00 AM

Firstpage

1633

Lastpage

1637

Abstract

The dependence of processing gain and interference immunity of adaptive narrowband linear beamformers on angular locations of single, double, and L interference sources is investigated. Corresponding expressions of these figures of merit are derived. It is found that different angular locations may correspond to the same processing gain and interference immunity. The former varies from unity to a maximum value which under certain conditions is independent of both the array geometry and the number of interference sources. The null directions of the quiescent beam correspond to unity processing gain and 100% interference immunity. However, there are always other directions where the processing gain is unity but the interference immunity is extremely small. The maximum processing gain is always associated with 50% immunity

Keywords

antenna phased arrays; interference (signal); signal processing; adaptive narrowband linear beamformers; angular locations; antenna array; array processing; figures of merit; interference immunity; interference sources; null directions; processing gain; quiescent beam; Adaptive arrays; Adaptive control; Antenna arrays; Geometry; Interference; Narrowband; Programmable control; Servosystems; Transient analysis; Voltage;

fLanguage

English

Journal_Title

Acoustics, Speech and Signal Processing, IEEE Transactions on

Publisher

ieee

ISSN

0096-3518

Type

jour

DOI

10.1109/29.60080

Filename

60080