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Patten recognition techniques are widely used for image processing in medical imaging. It provides assistance to physicians and scientists in large scale diagnosis. In this paper, we have proposed an automated system for detecting melanoma from dermoscopic images. We detected melanoma by extracting information from region of interest (ROI) rather than the whole image composed of lesion and background...
A robust adaptive beamforming algorithm based on least square constant modulus algorithm (LSCMA) is proposed in this paper. The CMA adaptive array was designed to lock onto the desired signal having the constant modulus property. The proposed algorithm employs both the DOA information as well as the constant modulus property of the signals. This enables the beamformer to avoid self-cancellation caused...
The paper holistically discusses the analysis and simulation of simplified two diode model and its comparative analysis with the one and three diode models. The two diode model presented has been grounded on the interpretation of the output current equation. This model entails four parameters and condenses the complexity and the computational time considerably. I-V and P-V curves for two diode model...
The digital beamforming (DBF) of ultra-wideband (UWB) radar is a challenging issue and its performance is closely affected by the delay compensation filters and the aperture of the antenna array. In this paper, a high-resolution DBF method for UWB signals utilizing Hermite fractional delay filter sets combining a virtual array created by a vector extrapolation algorithm on autoregressive(AR) models...
The convergence rate of the power inversion (PI) algorithm utilized in null steering antenna is of vital importance to handle interferences in efficient way. This paper presents the in-depth analysis of the factors affecting the convergence rate of null steering antenna utilizing power inversion algorithm. Apart from choosing optimum value of step size, factors like number of snapshots, signal structure,...
Cognitive Radio (CR) is an emerging and promising technology which is predicted to solve the problem of spectrum shortage by utilization of the spectrum efficiently by exploiting the licensed spectrum white spaces. Video on demand (VoD) is a very popular present day service. It is a well-known fact, that video on demand internet service needs a large amount of bandwidth. CR WMNs is envisaged to provide...
Smart antennas are the key technology to suppress interferences and enhance the desired signal in strong interfering environment for satellites and GPS Signals. Smart/Adaptive arrays uses certain algorithms to process the incoming signal. A systematic comparison of the performance of different Adaptive Algorithms for beamforming for Smart Antenna System has been extensively studied in this research...
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