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The decomposition of reversed time (DORT) method is a promising algorithm for microwave breast cancer imaging. However when DORT is applied to breasts with high percentage of glandular tissues, its performance decreases due to differences in the dielectric properties of the physical and computational media. We propose a new method of deriving pair wise permittivities by using the received scattered...
We propose novel beamspace-DORT and beamspace- TR-MUSIC for microwave imaging to detect breast cancer. The proposed imaging methods employ beamspace transformation in the receiving mode of time reversal process prior to back propagation of recorded received signals. We investigate the effectiveness of the proposed imaging methods using anatomically realistic MRI-derived dense numerical breast phantoms...
Here we propose novel beamspace processing techniques to enhance the existing time reversal imaging techniques and demonstrate their capability for the detection of early stage breast cancer. Performance of the proposed imaging technique for the detection of malignant lesions has been investigated using the FDTD breast model that contains dense breast tissues that have differing composition of fibroglandular...
In this paper, a maximum likelihood based parameter estimation method is proposed to apply with V-shaped planar antenna array for localisation of near-field radiating sources. We propose a novel approach which does not require any additional pair matching technique to obtain estimated parameter pairs. Also, a detection method is proposed here to identify the presence of the number of sources to be...
This paper proposes a technique to estimate signal parameters for the localization of near-field sources by using concentric circular ring antenna array. The concentric ring array has the property of frequency invariance over certain band of frequencies that can help in localizing wideband sources from received wideband signal. Maximum likelihood (ML) method is applied for parameter estimation of...
Here, we present a method of locating near-field electromagnetic sources by estimating the parameters using the new C-SPRIT algorithm. A simple L-shape received antenna array is used for locating the sources of scattering signal from 3-D point of view where the distance (range), azimuth and elevation angles are the parameters of interest. The scattering sources are modeled as thin finite dipole antennas...
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