JOURNAL BROWSE
Search
Advanced SearchSearch Tips
Signal-Blocking-Based Robust Adaptive Beamforming by Interference Null Space Projection
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
 Title & Authors
Signal-Blocking-Based Robust Adaptive Beamforming by Interference Null Space Projection
Choi, Yang-Ho;
  PDF(new window)
 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 sub arrays 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.
 Keywords
Robust Adaptive Beamforming;Duvall Beamformer;Null Space Projection;
 Language
Korean
 Cited by
1.
효과적인 간섭 부공간 추정을 통한 조향에러에 강인한 고유공간 기반 적응 어레이,최양호;

한국통신학회논문지, 2012. vol.37. 4A, pp.269-277 crossref(new window)
 References
1.
J. E. Hudson, Adaptive Array Principles. New York: Peregrinus Ltd., 1981.

2.
J. Li and P. Stoica,, Robust Adaptive Beamforming. Hoboken, NJ: Wiely, 2005.

3.
D. D. Feldman and L. J. Griffith, "A projection approach for robust adaptive beamforming," IEEE Trans. Signal Process., Vol.SP-42, pp.867-876, Apr., 1994.

4.
Z. Tian, K. L. Bell, and H. L. Van Trees, "A recursive least squares implementation for LCMP beamforming under quadratic constraint," IEEE Trans. Signal Process., Vol.49, No.6, pp.1138-1145, June, 2001. crossref(new window)

5.
J. Li, P. Stoica, and Z.-S. Wang, "Doubly constrained robust Capon beamforming," IEEE Trans. Signal Process., Vol.52, No.9, pp.2407-2423, Sept., 2004. crossref(new window)

6.
B. Widrow, K. M. Duvall, R. P. Gooch, and W. C. Newman, "Signal cancellation phenomena in adaptive arrays: Causes and cures," IEEE Trans. Antennas Propagat., Vol.30, pp.469-478, May, 1982. crossref(new window)

7.
Y.-H. Choi, "Signal-blocking-based adaptive beamformer with simple direction correction," Electron. Lett., Vol.40, No.8, pp.463-464, Apr., 2004. crossref(new window)

8.
Y.-H. Choi, "Performance improvement of adaptive arrays with signal blocking," IEICE Trans. Commun., Vol.E86-B, No.8, Aug., 2003.

9.
M. Wax and T. Kailath, "Detection of the number of coherent signals by the MDL principle," IEEE Trans. Acoust., Speech, Signal Process., Vol.37, pp.1190-1196, Aug., 1989. crossref(new window)