کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
563243 875483 2008 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Robust response control for adaptive beamformers against arbitrary array imperfections
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر پردازش سیگنال
پیش نمایش صفحه اول مقاله
Robust response control for adaptive beamformers against arbitrary array imperfections
چکیده انگلیسی

The recently proposed robust adaptive beamformers, which utilize the autocorrelation sequence of array weight, were formulated as linear optimization problems. With the constraints on magnitude response (CMRs), we are able to control the robust response region of these adaptive beamformers with specified beamwidth and response ripple. Hence, they are robust against large steering direction errors. In practice, many array imperfections may cause the violation of the CMRs, which results in target signal cancellation. In this paper, a novel adaptive beamformer is proposed with new robust CMRs that are derived based on the worst-case optimization. With the robust CMRs, the proposed beamformer is formulated as a linear programming problem with linear and second-order conic constraints. It possesses superior robustness against arbitrary array imperfections and high performance on signal-to-interference-plus-noise ratio (SINR) enhancement. Simple implementation, flexible performance control as well as high SINR enhancement support the practicability of the proposed method.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Signal Processing - Volume 88, Issue 9, September 2008, Pages 2234–2245
نویسندگان
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