کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6957357 1451916 2018 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Low-complexity adaptive broadband beamforming based on the non-uniform decomposition method
ترجمه فارسی عنوان
پرتو فرابنفش پهنای باند سازگار با کمبود پیچیدگی بر اساس روش تجزیه غیر یکنواخت
کلمات کلیدی
پرتوهای باند پهن پرتو فریم سازگار با زیرباند، روش تجزیه یکنواخت، تجزیه غیر یکنواخت،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر پردازش سیگنال
چکیده انگلیسی
Sub-band adaptive processing is an established method to design a broadband beamformer. The uniform decomposition method (UDM) is a common approach for designing sub-band adaptive beamformer (SAB) that would split the received signal into a number of uniform sub-bands. However, the UDM has redundancies on decomposed sub-bands at high frequencies in the passband. In this paper, we propose a number of techniques to overcome this issue. By proposing a novel relative bandwidth method (RBM), we obtain that the relative bandwidth of each sub-band is the same. Using this as a basis, we present a non-uniform decomposition method (NUDM) such that the NUDM has fewer sub-bands than the conventional UDM, leading to reduced computational complexity. We also propose an elegant metric, adjacent bandwidth ratio (ABR), to facilitate easier comparison of non-uniformity. We then extend NUDM method to provide a fast variant of the non-uniform decomposition SAB (FNUD-SAB). We ensure that the sub-band frequencies and corresponding adaptive weights are available as part of the proposed FNUD-SAB method. With undistorted response to the desired signal and effective anti-jamming capability, the new beamformer reduces the computational complexity by reducing the number of sub-bands. Simulation results highlight the effectiveness of the proposed methods.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Signal Processing - Volume 151, October 2018, Pages 66-75
نویسندگان
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