Adpative Beamforming Robust to Pointing Errors Through Extraction of Interference Correlation Matrix 


Vol. 48,  No. 7, pp. 795-802, Jul.  2023
10.7840/kics.2023.48.7.795


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  Abstract

The output SINR (signal-to-interference-plus-noise ratio) of an adaptive beamformer can be significantly deteriorated by pointing errors which cause the desired signal to be suppressed as an interference. We present a robust beamforming method through the extraction of an interference correlation matrix from the sample matrix, which is performed by an oblique projection. The matrix for oblique projection is found from the eigendecomposition of the sample matrix, without the estimation of the arrival angles and powers of interferences. Hence the computational complexity of the proposed method is much less than the existing ones that find an interference matrix through a matrix integration or direction estimation over a range of interference angle. The direction of the desired signal is estimated by MUSIC (multiple signal classification), which provides more accurate estimates than the Capon estimator that has often been used by existing beamformers. Simulation results demonstrate that the proposed method is robust against random errors as well as pointing errors.

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[IEEE Style]

Y. Choi, "Adpative Beamforming Robust to Pointing Errors Through Extraction of Interference Correlation Matrix," The Journal of Korean Institute of Communications and Information Sciences, vol. 48, no. 7, pp. 795-802, 2023. DOI: 10.7840/kics.2023.48.7.795.

[ACM Style]

Yang-Ho Choi. 2023. Adpative Beamforming Robust to Pointing Errors Through Extraction of Interference Correlation Matrix. The Journal of Korean Institute of Communications and Information Sciences, 48, 7, (2023), 795-802. DOI: 10.7840/kics.2023.48.7.795.

[KICS Style]

Yang-Ho Choi, "Adpative Beamforming Robust to Pointing Errors Through Extraction of Interference Correlation Matrix," The Journal of Korean Institute of Communications and Information Sciences, vol. 48, no. 7, pp. 795-802, 7. 2023. (https://doi.org/10.7840/kics.2023.48.7.795)
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