Guancheng Lin

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In practical array systems, traditional adaptive beamforming algorithms will degrade if some unexpected assumptions become wrong or imprecise. Therefore, the robustness of adaptive beamforming techniques against environmental and array imperfections is one of the key issues. Compared with traditional methods, robust beamforming brings about much improvement(More)
In order to explore a new optimization method for array signal beamforming, after studying the mathematical principal of the Support Vector Machine (SVM) algorithm and its primal cost function, we apply the modified cost function to the uniform array beamforming and minimize the constrained items by means of the method of Lagrange multipliers. Ultimately,(More)
In this paper, a practical design and fabrication of a small receiver which combines the structure of cymbal-type receiver with the material of a new kind of piezoelectric ceramic PLZT (lanthanum-modified lead zirconate titanite ) was introduced. The working principle of which was studied, and the characteristics such as frequency response, sensitivity and(More)
Array processing involves manipulation of signals induced on various antenna elements. Its capabilities of steering nulls to reduce co-channel interferences and pointing independent beams towards various users, as well as its ability to provide estimate of directions of radiating sources, make it attractive to the mobile communications system designer. In(More)
In practical array signal processing systems, traditional adaptive beamforming algorithms will degrade if some exploited assumptions become wrong or imprecise. Therefore, the robustness of adaptive beamforming techniques against environmental and array imperfections is one of the key issues. Compared with traditional methods, robust beamforming brings about(More)
In this paper, a kind of PLZT (Lanthanum-Modified Lead Zirconate Titanate) ceramic is introduced. Compare to the common ceramic PZT (Lead Zirconate Titanate), the PLZT ceramic exhibits excellent piezoelectric and dielectric properties. These properties will let the cymbal hydrophone made by PLZT have stable performance but lower sensitivity. In order to(More)
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