Subarray delta-sigma beamforming for ultrasonic imaging
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Dosyalar
Tarih
2002
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
IEEE
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
We present a beamforming architecture based on subarray processing with non-uniform oversampling 1-bit delta-sigma (??) modulation. The subarray processing combines conventional phased array and synthetic aperture approaches to form a large aperture using small subarrays thus reduces active channel count. ??-based beamforming improves the efficiency of front-end processing further: oversampling permits precise delaying and single bit data processing simplifies beamforming operation. To reduce the number of firings we use a low beam density associated with the subarray size, and then increase the beam density by lateral interpolation prior to coherent beam summation. Our experimental test results show that the proposed scheme provides high-resolution beamforming while simplifying the front-end.
Açıklama
Anahtar Kelimeler
Acoustic arrays, Acoustic signal processing, Active channel count, Array signal processing, Beam density, Beamforming, Beamforming architecture, Data acquisition, Delay, Delta sigma modulation, Delta-sigma modulation, Demodulators, Flow imaging, Focusing, Front-end processing, Image quality, Interpolation, Lateral interpolation, Modulators, Optical modulation, Phased array, Phased arrays, Radio frequency, Subarray delta-sigma beamforming, Subarray processing, Synchronization, Synthetic aperture, Testing, Ultrasonic imaging
Kaynak
Proceedings of the IEEE Ultrasonics Symposium
WoS Q Değeri
N/A
Scopus Q Değeri
N/A
Cilt
2
Sayı
Künye
Bilge, H. S., & Karaman, M. (2002). Subarray delta-sigma beamforming for ultrasonic imaging. Paper presented at the , 2 1623-1626 vol.2. doi:10.1109/ULTSYM.2002.1192605
