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Efficient Robust broadband Antenna array processor in the Presence of Look Direction Errors

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION 2013年第2期61卷 718-727页

作者： Hossain, M. S. Milford, G. N. Reed, M. C. Godara, L. C. Univ New S Wales Sch Engn & Informat Technol Canberra ACT 2600 Australia Univ New S Wales Australian Def Force Acad Canberra ACT 2600 Australia

The performance of adaptive antenna array processors is known to decline severely in the presence of array imperfections and uncertainties. Hence the robustness of an array processor against uncertainties is an important issue. Diagonal loading of the correlation matrix is a popular technique applied to the standard Frost processor to increase robustness of the array system. This paper presents a number of robust beamforming algorithms using efficient realization techniques. The techniques do not use a presteered array and allow an array designer to specify the frequency response of the processor in the look direction and steer the main beam of specified frequency response in an arbitrary direction. The proposed techniques are computationally efficient and applicable in environments with strong mutual coupling. Simulation results show the effectiveness of the proposed beamforming algorithms and compare the performance of the beamformer using the proposed techniques with that of existing methods.

关键词： broadband array processor efficient realization techniques robust beamforming algorithms smart antennas

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Robust Efficient broadband Antenna array Pattern Synthesis Techniques

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IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION 2014年第9期62卷 4537-4546页

作者： Hossain, M. S. Milford, G. N. Reed, M. C. Godara, L. C. Univ New S Wales Sch Engn & Informat Technol Canberra ACT 2600 Australia

This paper presents efficient robust broadband antenna array pattern synthesis techniques with interference cancellation capabilities. The synthesis techniques are able to place multiple broad nulls and isolated point nulls at regions of interest for interference cancellation. The new synthesis algorithms result in improved performance broadband antenna array processors. The presented synthesis techniques are computationally more efficient than the existing synthesis techniques. The paper includes numerical simulations that demonstrate the performance of the new techniques compared to existing methods.

关键词： broadband array processor broad null pattern synthesis techniques robust algorithm smart antennas

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General Linear Combination Based Robust and Computationally Efficient broadband processor

General Linear Combination Based Robust and Computationally ...

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Asia-Pacific Microwave Conference (APMC)

作者： Hossain, Md. Selim Godara, Lal C. Islam, Md. Rakibul Univ New South Wales Australian Def Force Acad Sch Engn & Informat Technol Northcott Dr Canberra ACT 2600 Australia

ISBN: (纸本)9780858259744

The performance of adaptive array processor is known to decline severely in the presence of array imperfections and uncertainties. So the robustness of adaptive array processor against uncertainties is one of the important issues. This paper presents general linear combination (GLC) based two robust beamforming algorithms using efficient realisation techniques. The techniques do not use a pre-steered array and allow an array designer to specify the frequency response of the processor in the look direction and steered the main beam of specified frequency response in an arbitrary direction. The proposed techniques are computationally efficient and robust algorithms are fully automatic. The techniques used in the paper extend a previously published technique used for narrow band beamforming to broadband beamforming. Theoretical analysis and simulation results show the effectiveness of the proposed beamforming algorithms.

关键词： Smart antennas broadband array processor Efficient realisation techniques Robust beamforming algorithms

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