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The paper presents a model and an algorithm for recognizing and handling articulated objects using industrial robots. The model is based on the skeleton of the object and it is used for recognition and to associate multiple grasping positions for robot handling. The object skeleton is a shape descriptor which preserves the topology of the object, even if the shape is changing. The model can associate...
The White Rabbit (WR) technology has been introduced as an enhancement and next generation of the Precision Time Protocol (PTP, IEEE 1588), providing a boost in synchronization accuracy from the usual sub-microsecond range commonly found in PTPv2-based applications, down to the much more precise sub-nanosecond range. A number of White Rabbit-capable network nodes have been developed with the goal...
Image compression has highly developed in recent decades. The common way is to transform the sensed image into an appropriate basis, then encode the important coefficients to reduce the data size. The Compressive Sensing based imaging (CSI) system can combine sensing and source coding process in one step. It is clear that the CSI system has the compression property, but compression of the CSI does...
The need for efficient Finite Impulse Response (FIR) filters in high-speed applications targets Field Programmable Gate Arrays (FPGAs) as an effective and flexible platform for digital implementation. Although FIR filter offer advantages like linear phase characteristic, no feedback loops and good system stability, its convolution nature poises a challenge in parallelization due to data dependency...
This paper investigates the Error Vector Magnitude (EVM) obtained using different parameters of Root Raised Cosine Filter (RRCF) for Visible Light Communication (VLC) front ends for M-QAM (M-ary Quadrature Amplitude Modulation) Broadband over Visible Light (BVL). The authors conducted a real measurement EVM using a modern modular PCI eXtensions for Instrumentation (PXI) measuring apparatus. This sophisticated...
The accurate and fast estimation of multifrequency signal parameters has a great importance in many applications. This paper presents a comparison of five (three IpDFT, Prony, TLS) estimation methods in respect of accuracy in the measurement time below two cycles of the tested signal which contains AWGN noise and harmonic components. A new IpDFT method is discussed and presented. It is based on the...
A vast amount of natural gas pipelines are installed underwater and they can be punctured because of various reasons such as corrosion and their increasing ages. In this study, nature of acoustic signals which are generated by leak holes on underwater natural gas pipelines is examined and a novel passive acoustic based system is proposed to detect the acoustic signals, to locate leak hole and to determine...
The paper shows relations between two different frequency representations of n-dimensional signals (n = 1, 2, 3): the Cayley-Dickson Fourier transform and the Hartley transform. The formulas relating the n-D complex Fourier transform and the n-D Hartley transform are presented. New formulas relating the Quaternion and Octonion Fourier transforms and respectively the 2-D and 3-D Hartley transforms...
In this paper, we propose a method for obtaining eigenvectors of discrete cosine and sine transforms of types I and IV. The approach is based on constructing an initial eigenvector of one of such trigonometric transforms and a generating matrix. Multiplying powers of the matrix by the initial eigenvector, new eigenvectors are obtained. It is shown how the generated eigenvectors can be used in the...
This paper presents a low-complexity two-dimensional (2D) detection strategy for shingled magnetic recording (SMR) media. The detection strategy involves the use of multi-level 2D BCJR detector along-track for inter-symbol interference (ISI) cancellation and regular BCJR detector across tracks for inter-track interference (ITI) cancellation. This is applied in a multi-track two dimensional magnetic...
This paper presents a SCORBOT-ER III type robotic arm which can be controlled only with an FPGA board. The robotic arm is an industrial/educational robotic arm which can execute a high number of tasks, but instead of a computer, only an FPGA development board is the control system. The robotic arm can be used also as a Sun tracker robotic arm. If the position of the sun in tracked the solar panel's...
Image processing has gained its popularity over the recent years in areas, such as computer vision, artificial intelligence and automation. Deflectometry image processing technique is developed to inspect defects on reflecting surfaces. FPGA offers flexibility by employing reconfigurability, and furthermore, provides parallelization and pipelining to improve latency and execution time. The performance...
In this paper, complete power output unit for an high-frequency (3-30MHz) transmitter system is presented. The system consists of a 4:1 power combiner block, a power control unit which is vital for the effective operation of the system and four commercially available power amplifiers. In order to achieve high-performance, we have focused on the design of power combiners and power control unit. To...
Factor of sparsity in a speech signal plays an important role in the speech processing. This paper proposed a method in which variable regularization factor of sparsity is applied for the mixed signal and used to separate the monaural speech signals. The sparsity regularization factor for individual training and testing signal was find using particle swarm optimization. Algorithm has been tested for...
Epileptic seizure is one of the most common neurological diseases around the world. It is clinical symptoms and/or signs due to abnormal excessive or synchronous neuronal activity in the human brain. Electroencephalogram (EEG) that measures the electrical activity of the brain generated by the cerebral cortex nerve cells, is the most utilized test to detect the seizure activities by visual scanning...
A synthetic aperture radar (SAR) image is often obtained based on a part of intercepted echo from the collected raw data in the azimuth direction. It is discovered that the azimuth length of a SAR image has an effect on the target position in the image domain. For a SAR image with a large azimuth length, the azimuth shift is the distance between the original position and the final position of a moving...
The presence of side-lobes in the impulse response retrieved after pulse compression is a limitation in the range resolution performance of detection systems; in order to limit this effect the signal is often shaped by means of windows. In this paper we analyse the causes that produce side-lobes and propose a technique for their reduction, based on time-domain constraints which, in the case of base-band...
The estimation of the frequency in a Discrete Fourier Transform (DFT) or Fast Fourier Transform (FFT) is a fundamental and well-studied problem in signal processing and communications. A variety of approaches to this problem, distinguished primarily by estimation accuracy, computational complexity, and processing latency, have been developed. For a signal containing an integer number of periods there...
In this paper, an adaptive localization algorithm for moving EEG sources based on tensor factorization is proposed. Moreover, using the augmented complex statistics in tensor factorization enabled us to exploit the full second order information by involving the effect of pseudo-covariance matrix. We simulated EEG signals by using EEG forward solution for moving source dipoles. Then pairing adjacent...
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