Sequentially operated SPT-LCMV beamformer to overcome coherent interferences

Author

Jo, Jin-Hee ; Sung-Hoon Moon ; Cho, Myeong-Je ; Han, Dong-Seog

Author_Institution

Sch. of Electron. & Electr. Eng., Kyungpook -Nat. Univ., Taegu, South Korea

Volume

1

fYear

2002

fDate

7-10 Oct. 2002

Firstpage

658

Abstract

The paper proposes a sequentially and linearly constrained minimum variance beamformer (SLCMV) based on a split polarity transformation (SPT) called an SPT-SLCMV beamformer. The proposed SPT-SLCMV is an improved version of an SPT-LCMV beam-former as it can minimize the degree of freedom loss and eliminate the desired signal cancellation phenomenon under coherent interference situations. These advantages are obtained by successively applying sub-constraint matrices divided from a whole constraint matrix to remove any correlation between the desired and interference signals. As a result, the proposed beamformer can solve the degree of freedom loss while maintaining the performance of the conventional SPT-LCMV beamformer.

Keywords

array signal processing; interference suppression; matrix algebra; minimisation; radio networks; radiofrequency interference; adaptive array; coherent interference; constraint matrices; degree of freedom loss minimization; linearly constrained minimum variance beamformer; sequentially constrained minimum variance beamformer; sequentially operated beamformer; signal cancellation; split polarity transformation; subconstraint matrices; Adaptive arrays; Covariance matrix; Direction of arrival estimation; Interference cancellation; Interference constraints; Interference elimination; Master-slave; Performance loss; Smoothing methods; Vectors;

fLanguage

English

Publisher

ieee

Conference_Titel

MILCOM 2002. Proceedings

Print_ISBN

0-7803-7625-0

Type

conf

DOI

10.1109/MILCOM.2002.1180523

Filename

1180523