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:: year 2, Issue 1 (Journal of Acoustical Engineering Society of Iran 2014) ::
مجله علمی پژوهشی انجمن مهندسی صوتیات ایران 2014, 2(1): 24-31 Back to browse issues page
Reduction of computational complexity of minimum variance beamforming in beam-space
A. Mohades Deilami, B. Mohammadzadeh Asl *
Abstract:   (5751 Views)
Common medical ultrasound beamformers such as Delay and Sum can be interpreted as element-space methods. In element-space, the received data would be added after applying delays and appropriate weights. The main idea in beam-space beamforming is to use orthogonal beams steered in different directions instead of using spatial statistics of elements in array to distinguish between desired signal and interferences. This means a map from element-space to beam-space. The amount of computation would be reduced because of less signal dimensions, but extra computation is needed to make the map from element-space to beam-space. This additional calculation can be reduced by using FFT. In this paper, minimum variance beamformer is implemented in beam-space instead of element-space to reduce computational complexity. Results show that minimum variance in beam-space can achieve similar resolution and can decrease side lobes as element-space.
Keywords: Beam-space, Minimum variance, Medical ultrasound imaging, Adaptive Beamforming
Full-Text [PDF 531 kb]   (671 Downloads)    
Type of Study: Research | Subject: Hydroacoustics
Received: 2014/04/19 | Accepted: 2014/09/12 | Published: 2014/09/22
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Mohades Deilami A, Mohammadzadeh Asl B. Reduction of computational complexity of minimum variance beamforming in beam-space . مجله علمی پژوهشی انجمن مهندسی صوتیات ایران. 2014; 2 (1) :24-31
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year 2, Issue 1 (Journal of Acoustical Engineering Society of Iran 2014) Back to browse issues page
مجله علمی-پژوهشی انجمن مهندسی صوتیات ایران Journal of Acoustical Engineering Society of Iran
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