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http://dx.doi.org/10.7776/ASK.2017.36.3.151

General linearly constrained adaptive arrays  

Chang, Byong Kun (Department of Electrical Engineering, Incheon National University)
Publication Information
The Journal of the Acoustical Society of Korea / v.36, no.3, 2017 , pp. 151-157 More about this Journal
Abstract
A general linearly constrained adaptive array is proposed to improve the nulling performance. The nulling performance is examined in the array weight vector space. It is shown that the constraint plane is shifted to the origin perpendicularly by the gain factor such that the increase of the gain factor results in the decrease of the distance from the constraint plane to the origin. Thus the variation of the gain factor has an effect on the extent of orthogonality between the weight vector and the steering vectors for the interferences such that the nulling performance of the general linearly constrained adaptive array is improved by the gain factor. It is observed that the proposed adaptive array with an optimum value of the gain factor yields a better nulling performance in coherent signal environment and a similar nulling performance in noncoherent signal environment compared to the conventional linearly constrained adaptive array.
Keywords
Adaptive array; Optimum; Gain factor; Linear constraint; Nulling performance;
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Times Cited By KSCI : 2  (Citation Analysis)
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1 O. L. Frost, III, "An algorithm for linearly constrained adaptive array processing," Proc. IEEE 60, 926-935 (1972).   DOI
2 B. Widrow, K. M. Duvall, R. P. Gooch, and W. C. Newman, "Signal cancellation phenomena in adaptive antennas: causes and cures," IEEE Trans. Antennas Propagat. 30, 469-478 (1982).   DOI
3 T. J. Shan and T. Kailath, "Adaptive beamforming for coherent signals and interferences," IEEE Trans. Acoust., Speech, and Signal Proc. 33, 527-536 (1985).   DOI
4 B. K. Chang, C. H. Jeon, and D. H. Song, "Performance improvement in alternate mainbeam nulling by adaptive estimation of convergence parameters linearly constrained adaptive arrays," J. KIMICS, 7, 392-398 (2009).
5 B. K. Chang and C. D. Jeon, "Research for performance analysis of antenna arrays in basestation for GSM system" (in Korean), J. KIEES, 16, 740-745 (2005).
6 B. K. Chang, T. Y. Kim, and Y. K. Lee, "A Novel approach to general linearly contrained adaptive arays," JICCE 2, 108-116 (2012).
7 B. K. Chang, N. Ahmed, and D. H. Youn, "Fast convergence adaptive beamformers with reduced signal cancellation," Proc. Asilomar Conf. on Signals, Systems, and Computers, Pacific Grove, 823-827 (1988).
8 B. K. Chang, "Optimum array processing with variable linear constraint," JICCE 12, 140-144, (2014).
9 S. P. Applebaum and D. J. Champman, "Adaptive arrays with mainbeam constraints," IEEE Trans. Antennas Propag. AP-24, 650-662 (1976).
10 J. H. Chang and F. B. Tuteur, "A new class of adaptive array processors," J. Acoust. Soc. Am. 49, 639-649 (1971).   DOI
11 R. T. Lacoss, "Adaptive combining of wideband array data for optimal reception," IEEE Trans. Geosci. Electron. GE-6, 78-86 (1968).
12 B. Widrow and S. D. Stearns, Adaptive Signal Processing (Prentice Hall, New Jersey, 1985), pp. 56-60.