کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
563268 875486 2013 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Beamspace direction finding based on the conjugate gradient and the auxiliary vector filtering algorithms
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر پردازش سیگنال
پیش نمایش صفحه اول مقاله
Beamspace direction finding based on the conjugate gradient and the auxiliary vector filtering algorithms
چکیده انگلیسی

Motivated by the performance of the direction finding algorithms based on the auxiliary vector filtering (AVF) method and the conjugate gradient (CG) method as well as the advantages of operating in beamspace (BS), we develop two novel direction finding algorithms for uniform linear arrays (ULAs) in the beamspace domain, which we refer to as the BS AVF and the BS CG methods. The recently proposed Krylov subspace-based CG and AVF algorithms for the direction of arrival (DOA) estimation utilize a non-eigenvector basis to generate the signal subspace and yield a superior resolution performance for closely spaced sources under severe conditions. However, their computational complexity is similar to the eigenvector-based methods. In order to save computational resources, we perform a dimension reduction through the linear transformation into the beamspace domain, which additionally leads to significant improvements in terms of the resolution capability and the estimation accuracy. A comprehensive complexity analysis and simulation results demonstrate the excellent performance of the proposed algorithms and show their computational requirements. As examples, we investigate the efficacy of the developed methods for the discrete Fourier transform (DFT) and the discrete prolate spheroidal sequences (DPSS) beamspace designs.


► We develop two Krylov subspace-based direction finding algorithms in the beamspace domain.
► We investigate their performance for the DFT and DPSS beamspace design.
► Their performance is superior to that of their counterparts in the element space.
► They provide an improved performance over existing techniques in the beamspace.
► They require a lower computational complexity than their element space versions.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Signal Processing - Volume 93, Issue 4, April 2013, Pages 641–651
نویسندگان
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