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J Electromagn Eng Sci > Volume 8(2); 2008 > Article
Journal of the Korean Institute of Electromagnetic and Science 2008;8(2):52-58.
DOI: https://doi.org/10.5515/JKIEES.2008.8.2.052   
Linearly Constrained Adaptive Array Processing with Alternate Mainbeam Nulling
Byong-Kun Chang1, Chang-Dae Jeon2, Dong-Hyuk Song3
1Department of Electrical Engineering, University of Incheon
2Entel Korea
3ATICS Engineering, Inc.
Abstract
This paper concerns with signal cancellation problem in a linearly constrained adaptive array processor in coherent environment. Alternate mainbeam nulling approach was proposed to prevent the signal cancellation phenomenon. The linearly constrained LMS algorithm with a unit gain constraint and that with a null constraint in the direction of the desired signal is alternately implemented to reduce the signal interaction between the desired signal and the interferences, which is the main cause of the signal cancellation. It is shown that the proposed method performs better than a conventional method.
Key words: Adaptive Array, Linear Constraint, LMS Algorithm, Coherent, Signal Cancellation, Mainbeam Nulling
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