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A QRS Complex detector has been designed for the wearable Electrocardiogram (ECG) systems using Multi Scaled product with booth multiplier and soft threshold algorithm. The raw ECG signal is first digitalized by passing it through an analog to digital converter (ADC), then a Wavelet decomposer is used for the decomposition of the signal into four Wavelet Filter Banks. A Noise detector is connected...
Power line communications is the use of power lines for the dual purpose of power transmission and data transmission. It is an emerging field of communication for the home area network of smart grid. Power line noise, namely background noise and impulsive noise, significantly affects the performance of power line communication systems. In this paper, we derive the condition for optimum detection of...
This paper considered about how the channel estimation effectively done for high-speed mobility system. Here the transmission rate greatly varied depending on speed of the mobile moving far away or close to the base station. The impulse swings are frequency shifts and delay spread various for each symbol called multipath fading is because of this OFDM signals losses the orthogonality because of Inter...
Single Photon Counting architectures used in X-ray pixel imaging systems have superior performance (essentially infinite dynamic range, noiseless imaging, possibility of photons' counting only within a given energy window), however they offer only a limited photon count rate performance per single pixel. This paper presents a novel architecture of front-end readout electronics, which due to digitally...
QRS detection in exercise stress test recordings remains a challenging task, because they are highly non-stationary and contaminated with noises, such as large baseline wander and muscular noise, among others. The aim of this work is to find an optimal set of parameters for QRS detection in very noisy ECG signals, such as those acquired during stress tests. Parameter optimization was addressed by...
We developed a new, robust and efficient heart beat detector in multimodal data using an ECG signal, and one of the pulsatile signals such as blood pressure (BP), if present. To calculate the detection functions, simple and fast integer-multiplier sampling-frequency adjustable digital filters were developed. Using the morphological smoothing, the ECG and pulsatile-signal detection functions, and the...
In this paper, two techniques are proposed to enhance the security and performance of Chaotic ON-OFF Keying (COOK) scheme and named as a Permutation based Chaotic ON-OFF Keying (P-COOK) and Time Reversal based COOK (TR-COOK) respectively. In the first system, bits are transmitted in frames. Samples of the modulated bits are interleaved and permutated before transmission which hides bit pattern in...
We propose a novel method for improved object detection in a video. Our approach adapts a generic offline trained detector (OTD) to a specific test video by collecting online samples in an unsupervised manner. Most of the existing adaptation methods focus on collecting confident online samples and do not address how to deal with ambiguous and noisy online samples. We address the importance of collecting...
We address the problem of multiple pedestrian tracking in crowded scenes in videos recorded by a static uncalibrated camera. We propose an online multiple pedestrian tracking algorithm that utilizes group behaviour of pedestrians using minimum spanning trees (MST). We first divide pedestrians into several groups using the agglomerative hierarchical clustering, taking position and velocity of pedestrians...
Switching median filter is known as one of effective algorithms for impulse noise reduction. In this paper, we present an improved switching median filter by considering weighted neighboring pixel locations. Specifically, the proposed method generates a flag map using boundary discriminative noise detection(BDND) detector. Next, we conduct a noise reduction by estimating the local noise density. When...
Simulation of IR detector noise is a difficult part in engineering development of 3D dynamic IR scene simulation. A technology of dynamically generating noise of IR detector is provided in this article. First, by computing and analyzing the images sequence of IR detector, the random gauss noise, salt noise and heterogeneity noise is picked up. In scene simulation developed by OSG, a noise "screen"...
A divide and conquer approach is one of the methods introduced to get over the scalability problem of the evolutionary circuit design. A complex circuit is decomposed into modules which are evolved separately and without any interaction. The benefits are in reducing the search space and accelerating the evaluation of candidate circuits. In this paper, the evolution of non-interacting modules is replaced...
In recent years, the link between the various human communication production domains has become more widely utilised in the field of speech processing. Work by the authors and others has demonstrated that intelligently integrated audio and visual information can be used for speech enhancement. This advance in technology means that the use of visual information as part of hearing aids or assistive...
The effect of different noise sources on the noise current in HgCdTe barrier detectors, working at near-room temperatures, was analyzed theoretically. The set of transport equations for fluctuations was solved to obtain spectral densities of fluctuations of electrical potential, quasi-Fermi levels, and temperature. The spectral density of both, shot and \lf fluctuations of generation-recombination...
The effect of increasing the number of transmit and receive antennas in Spatial Multiplexing - Multiple Input Multiple Output (MIMO) communication systems, on the performance of LTE detectors, was investigated, in order to get more robust detectors. The channel environments used are Additive White Gaussian (AWGN), noise and heavy-tailed noise distributions as an actual noise distribution. The detectors...
We investigate the detector design in generalized space shift keying (GSSK) modulation for large MIMO systems. An orthogonal matching pursuit (OMP) based detector design is adopted due to its low complexity compared with the maximum likelihood (ML) detector. To improve the performance of the OMP algorithm, our first design is to propose an equalizer at the receiver in order to orthogonalize the equivalent...
In this paper, we study the problem of multiple antenna spectrum sensing by using cyclostationary features of Primary Users (PUs) signals in Cognitive Radios (CRs). We consider the general case of multiple antenna sensing in the presence of spatially and temporally correlated noise when the PU signal has more than one cyclic frequency. We model and formulate the multiple antenna sensing problem as...
One of the challenges of scientific data collection on a big data scale is the problem of storing all data. An example of this is femtosecond crystallography. Here, small crystals are illuminated by a pulsed X -- ray laser beam and the resulting diffraction patterns are recorded by a detector device. However, only a minor portion of the diffraction data can be used in subsequent analyses because the...
Image tampering is nowadays at everyone’s reach. This has determined an urgent need of tools capable of revealing such alterations. Unfortunately, while forgeries can be operated in many different ways, forensic tools usually focus on one specific kind of forgeries. Therefore, an effective strategy for tampering detection and localization requires to merge the output of many different forensic tools...
Edge detection is one of the prominent preprocessing stages in many image processing applications like Image Segmentation, Machine vision, Image Analysis and Feature Extraction etc. In order to get optimally true edge response in these applications, a particular edge detection technique shall be vulnerable to errors even when the input image gets contaminated due to presence of high frequency noise...
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