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A new discrete Fractional Fourier transform based Kaiser-window design technique has been adopted in this paper for the synthesis of a band-pass filter (BPF) in finite impulse response (FIR) form. The filter design is attempted with the aim of efficient power feedback with the measured sensor data, to the regulating system of nuclear reactors. The ill effects of integer and fractional order noise...
This paper presents the design of a Hybrid Posicast Controller (HPC) for a DC-DC Boost Converter (BC) operated in Continuous Conduction Mode (CCM). A HPC is a feed-forward compensator, which eliminates the peak overshoot in the step response of lightly damped systems. However, the conventional control technique is very sensitive to variations in natural frequency of oscillation in the system. In order...
This paper presents the evaluation of the effect of noise reduction techniques on the brain Computed Tomography (CT) images. In particular, multiscale geometric denoising methods based on curvelet transform are used and compared with wavelet based methods. The simulated results show that cycle spinning based curvelet transform method outperforms the wavelet based methods not only for the suppression...
Image restoration is the process of recovering the original image from the degraded image. Aspire of the project is to restore the blurred/degraded images using Blind Deconvolution algorithm. The fundamental task of Image deblurring is to de-convolute the degraded image with the PSF that exactly describe the distortion. Firstly, the original image is degraded using the Degradation Model. It can be...
Ultrasound imaging is a widely used and safe medical diagnostic technique, due to its noninvasive nature, low cost, real time imaging. However the usefulness of ultrasound imaging is degraded by the presence of signal depended noise known as speckle.. The speckle pattern depends on the structure of the image tissue and various imaging parameters. There are two main purposes for speckle reduction in...
Mainstay of this paper is to reduce noise to perform video enhancement using filtered directional bases and frequency-adaptive shrinkage. The input image is decomposed into flat region and edge region. After removing noise in the flat region, noise in the edge region is removed. We present a new directional transform using wavelet basis and Gaussian low pass filters. Hence after the removal of noise,...
In this paper, the effect of device geometry variations on a narrow band cascoded low noise amplifier (LNA) structure performance has been studied in 30 nm gate length FinFET-based LNA operating at 10 GHz using device and mixed mode simulations in Sentaurus TCAD simulator from Synopsys. Twelve different device geometrical parameters are varied to capture their impact on LNA parameters. It is found...
In this paper, Spatial video denoising using wavelet transform has been focussed as it requires less computation and more suitable for real-time applications. Two specific techniques for spatial video denoising using wavelet transform are considered in this work, 2D Discrete Wavelet Transform (2D DWT) and Integer wavelet transform. Each of these techniques has its advantages and disadvantages. The...
A three op-amp active resistance instrumentation amplifier (I.A) with high gain and dc suppression is presented for biomedical applications. High gain is achieved by careful selection of aspect ratio of op-amps and by efficient design of passive resistances by active MOS transistors. DC suppression is achieved by offset cancellation circuit at the output of I.A. This offset cancellation circuit is...
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