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This paper introduces a Multispectral approach for segmentation of tumor core using three MRI imagery viz. T1-contrast, T2 & Flair. In all countries the number of people diagnosed with brain tumor is increasing rapidly. This puts people's life in serious danger. A large amount of MRI scans showing brain tumor are currently being generated in clinics. The manual process for tumor segmentation by...
Compressors form the basic element of arithmetic circuits that are dominated by multi-operand addition operations. Compressor circuits based on carry-save logic have been used in past to realize parallel multipliers for ASIC implementation, however, owing to the peculiar architecture of FPGAs, these circuits do not map well on these platforms. In this paper, FPGA implementation of 4:2 compressor circuit...
In today's world the most common wireless technology uses radio frequency(RF), Microwave, infrared(IR) for data communication. But ultrasonic can be a promising alternative method as unlike RF it does not have any biological effect that results in heating of human tissue. The development of aeronautical single channel and multichannel ultrasonic data communication system is discussed in this paper...
In this paper, a memory optimizing architecture for FPGA implementation of a two-dimensional discrete wavelet transformation with the lifting scheme for real-time video by processing is proposed. At first, a discrete wavelet transformation (DWT) aiming for a Haar wavelet is implemented by the MATLAB/Simulink HDL coder with outputs the approximation, horizontal details, vertical details and diagonal...
In this paper, we propose a simple technique for extrapolating the spectra of speech signal based on real zero crossings and higher order crossings (HOC). In this approach, the speech signal is first subjected to a sequence of difference/sum filtering. Then counts of zero crossings are calculated over short overlapped frames to obtain a sequence of counts. This sequence represents the dominant frequency...
This paper aims to bring in light non-intrusive speech quality assessment using Teager-Kaiser energy computation. Based on the above mentioned energy computation technique, Features in the form of cepstral coefficient are calculated and thereby, compared to the classical Mel-frequency cepstral co-efficient. The energy computation technique is vividly used in automatic speech recognition area. The...
In many combat and civilian applications there is a need to detect and estimate parameters of multiple targets. In this paper, an algorithm to detect multiple targets in OFDM-RADAR environment is proposed. The detection is carried out by utilizing the fact that the problem of detecting targets in OFDM-RADAR environment is similar to that of the problem of detecting spectral components from the noisy...
A compact multi band slotted two elements MIMO antenna is designed on FR4 substrate with the dimensions 60×60×1.5 mm3 and an εr of 4.4. To achieve high isolation between the radiation elements, a Defected Ground Surface (DGS) technique is applied. The isolation between the elements and gain both increased considerably. In the simulated and measured return loss vs frequency results, multi bands are...
The major goal of research in Mobile Ad hoc Networks (MANET) is the efficient utilization of scarce available resources while improving network throughput and network lifetime. Energy consumption is one precious component of these resources as multimedia applications consumes enormous amount of energy during communication. To achieve the goal of optimal energy conservation of a MANET, an optimal power...
Passive optical networks (PONs) are more proficient to meet the demand of huge bandwidth and high capacity technologies in optical communication system. PON is point to multipoint networks and also enhances the network efficiency and reduces network termination cost. In this paper, we compare the performance and operational difference of proposed bidirectional broadband passive optical network (BPON)...
In Prototype Fast Breeder Reactor (PFBR), top shield consisting of roof slab, large rotatable plug, small rotatable plug and control plug. Maintaining the temperature and temperature difference across the top shield is important to limit the thermal bowing of the top shield. Thus thermal design of top shield is a complex process, which needs detailed theoretical and experimental investigation and...
Neurons in the brain from connection hence many neuron together tie up to form a network. Connectivity map interprets such connections in graphical form. Various signal processing and information theory techniques, can be implemented to form connectivity of the network of neurons on the Multi electrode array dish. The time of spike occurrences and electrode location of spike were recorded from the...
In this paper, we address the problems of frequency and timing synchronization for OFDM/OQAM systems in additive white Gaussian noise (AWGN) channel. A two step preamble based approach for carrier frequency offset (CFO) and timing offset (TO) estimation is proposed. The first step is joint coarse CFO and TO estimation and the second step is fine CFO (FCFO) estimation. We derive the Cramer-Rao lower...
One of the most efficient techniques that is inevitable for the state of the art communication system in today's wireless communication is multiple-input multiple-output (MIMO) technology. MIMO provides robustness against multipath fading using spatial diversity gain, and increases data rate by spatial multiplexing gain. These gains are achieved due to the usage of several antennas. This paper presents...
Restoration of images degraded by defocus blur can be done by using non-blind image restoration algorithms if the amount of defocus is known. This paper proposes two methods to estimate the radius of defocus in a blurred image. The first method establishes a mathematical relation between the defocus radius and the radius of the innermost concentric circle in the spectrum of the defocus blurred image...
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