Improved Delay-and-Sum Beamforming Algorithm for Breast Cancer Detection

Autor:	M. Klemm, I. J. Craddock, J. A. Leendertz, A. Preece, R. Benjamin
Jazyk:	angličtina
Rok vydání:	2008
Předmět:	Electrical engineering. Electronics. Nuclear engineering TK1-9971 Cellular telephone services industry. Wireless telephone industry HE9713-9715
Zdroj:	International Journal of Antennas and Propagation, Vol 2008 (2008)
Druh dokumentu:	article
ISSN:	1687-5869 1687-5877
DOI:	10.1155/2008/761402
Popis:	We have evaluated a modified delay-and-sum (DAS) beamforming algorithm for breast cancer detection with a microwave radar-based system. The improved DAS algorithm uses an additional weight factor calculated at each focal point to improve image quality. These weights essentially represent the quality of preprocessing and coherent radar operation. Using a multistatic UWB radar system based on a hemispherical antenna array, we present experimental detection of 7 mm and 10 mm phantom tumours. We show that the new proposed DAS algorithm improves signal-to-clutter ratio in focused images by 2.65 dB for 10 mm tumour, and by 4.4 dB for 7 mm tumour.
Databáze:	Directory of Open Access Journals
Externí odkaz:	https://doaj.org/article/223c62b45caa43679505775429522dd9 Zobrazit plný text záznamu Plný text View record in DOAJ