Signal-Blocking-Based Robust Adaptive Beamforming by Interference Null Space Projection 


Vol. 36,  No. 4, pp. 399-406, Apr.  2011


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  Abstract

Adaptive beamformers, which utilize a priori information on the arrival angle of the desired signal. suppress interferences while maximizing their gains in the desired signal direction. However, if there exist errors in the direction information, they can suffer from severe performance degradation since the desired signal is treated as an interference. A robust adaptive beamforming method is presented which exploits the signal-blocking structure of the Duvall beamformer. The proposed method finds an interference signal space directly from correlations of received signals and then obtains a weight vector such that it is orthogonal to the space. Applying the weight vector to two subarrays which consist of one less sensors than the original uniform lineal array (ULA), the beamformer efficiently estimates the arrival angle of the desired signal. Its computational complexity is lower than existing methods, which require matrix inversion or eigendecomposition.

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  Cite this article

[IEEE Style]

Y. Choi, "Signal-Blocking-Based Robust Adaptive Beamforming by Interference Null Space Projection," The Journal of Korean Institute of Communications and Information Sciences, vol. 36, no. 4, pp. 399-406, 2011. DOI: .

[ACM Style]

Yang-Ho Choi. 2011. Signal-Blocking-Based Robust Adaptive Beamforming by Interference Null Space Projection. The Journal of Korean Institute of Communications and Information Sciences, 36, 4, (2011), 399-406. DOI: .

[KICS Style]

Yang-Ho Choi, "Signal-Blocking-Based Robust Adaptive Beamforming by Interference Null Space Projection," The Journal of Korean Institute of Communications and Information Sciences, vol. 36, no. 4, pp. 399-406, 4. 2011.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880