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Light sources are being competitive in the current market. Several types of these products have been widely used in the last two decades. They play a major role on the low voltage network as they produce and inject undesired noise onto the transmission lines of the PLC channel. This noise can be of a serious and negative effect when using the power line communications system to control the automatic...
This paper shows how Light Emitting Diode (LED) Tubes negatively influence the data rate throughput of an indoor broadband Power Line Communications (PLC) channel. This negative influence on the data rate is due to noise being generated by the lamps. Differential Mode measurements were done with two PLC modems communicating and then introducing LED lamps that add noise to the channel. Drops in data...
Here we report on the efficient detection of THz radiation generated from Ti:sapphire femtosecond laser system. The large-area interdigitated antenna is excited by optical pulses with pulse duration from 15 to 47 fs. We have tested two AlGaN/GaN HEMT-based THz detectors with integrated broadband antennas. Detectors are comparable in sensitivity but differ in applied parasitic signals elimination techniques...
Localization is a crucial part in robot navigation. The significance of this issue is to the extent that further achievements in terms of robot control is highly dependent on that. There are various methods addressing this subject, among which the extended Kalman filter is proved to be one of the most successful ones. In classic extended Kalman filter, covariance matrixes of process noise Q and measurement...
As part of ONR's Integrated Topside (InTop) Program, in 2014 Northrop Grumman delivered a bi-static, active, electronic scanned array (AESA) system, capable of multifunction, simultaneous transmit and receive operation. The system is wide band, transmits high power and has high receive sensitivity. Further, there are simultaneous transmit and receive modes required, in which the transmit AESA radiates...
Inter-radar interference can cause the important impact to the radar detection performance because radar operates with high transmitter power, sensitive receiver and wideband. Because short-range surveillance radar is deployed rather close to each other, inter-radar interference is more critical. In this paper, the international criteria for radar interference protection is reviewed based on the ITU-R...
Kinect™, a low-cost multimedia sensing device, has revolutionized human computer interaction (HCI) by making various applications of human activity tracking affordable and widely available. Often multiple Kinects are used in imaging applications to improve the field of view, depth of field and uni-directional vision of a single Kinect. Unfortunately, multiple Kinects lead to IR Interference Noise...
Timely delivery of critical traffic is a major challenge in industrial applications. The Wireless Dominance (WiDOM) medium access control protocol offers a very large number of priority levels to suit time sensitive application requirements. In particular, assuming that its overhead is properly modeled, WiDOM enables an accurate evaluation of the network response time in the wireless domain, through...
During a fault on the power grid, earthing systems operate to contain the energy keeping people and equipment safe. Unfortunately, these systems can fail and create hazards when the resistance is too high, as a result of improper design, installation or maintenance. Regular on-site testing of earthing grids is essential to prevent these situations. The most commonly used method to test earthing grids...
The effect of wall attenuation on the uplink performance of an interference limited indoor wireless communication system is investigated. An indoor environment containing multiple co-channel access points is investigated for connections made on the basis of strongest signal or best SIR and for varying intervening wall attenuations. Power balancing is used to equalize signal-to-interference ratios...
Electrocardiogram (ECG) can help to diagnose range of diseases including heart arrhythmias, heart enlargement, heart inflammation (pericarditis or myocarditis) and coronary heart disease. ECG consists of noise which is non stationary that affects the reliability of ECG waveform. In this paper an adaptive filter for denoising ECG signal based on Least Mean Squares (LMS), Normalized Least Mean Square...
Electrocardiogram (ECG) is a biological signal which reflects the electronic excitement of cardiac activities and vital signs. As a kind of signal time marker, the parameter information of ECG, such as R wave amplitude and RR period, plays an important part in clinic. According to the traditional characteristics of ECG signal, an ECG automatic analysis system is designed based on virtual instruments...
the reaching law is a convenient method for the design of sliding mode control. This method retains the robustness of the sliding mode control and makes the reaching speed adjustable. In the design of the sliding mode control for system with steady-state error which caused by disturbance, the traditional reaching law cannot eliminate the steady state error, in other words the states of system cannot...
MIMO systems provides number of features like spatial diversity, multiplexing gain, and high spectral efficiency gain by keeping the bandwidth expansion or transmission power similar to other systems. The major concern in the system is inter symbol interference (ISI) caused by the channel. An equalizer is deployed on the receiver side to detract the effect of ISI. In this paper, simulation is done...
Wireless communication is vulnerable to intentional electromagnetic interference, and therefore it is important to understand the interfering mechanisms. In this paper we investigate the effect of pulsed interference - as compared to continuous interference - on a receiver of digital amplitude modulated signals. To correctly receive the signals, a threshold estimate has to be computed for the proper...
This paper addresses the characterization of optimal input distributions for the general additive quadrature Gaussian-mixture (GM) noise channel under an average power constraint. The considered model can be used to represent a wide variety of communication channels, such as the well-known Bernoulli-Gaussian and Middleton Class-A impulsive noise channels, co-channel interference in cellular communications,...
The Cognitive Multiple Access Z-Interference Channel consists of a MAC channel that receives interference from an external transmitter. In a previous work we studied this model where both MAC users are cognitive and showed that an encoding scheme based on Dirty Paper coding attains the capacity region for the Gaussian case. In this work we assume that only one MAC user is cognitive and show that the...
The spectrum sharing between radars and communication networks raises attention in recent years. Unlike communication, the radars usually occupy large extent of frequency bandwidth, and have different kinds of missions, which make the spectrum sharing problem more complicated. In this paper, we model the scenario that multiple imaging radars, which are the most common spectrum demanders, working in...
In this paper, we propose a new method of secrecy signal and artificial noise (AN) transmission for a MISO wiretap channel in wireless cellular networks. We first design the secrecy signal beamformer such that its power leakage to the unintended directions is minimized, then we concentrate the AN on the directions with higher risk of information leakage, rather than broadcast it isotropically, such...
In this paper, a low overhead preamble structure is proposed for the interference approximation method — complex (IAM-C) method in offset quadrature amplitude modulation based orthogonal frequency division multiplexing (OQAM-OFDM) systems. Compared with the conventional preamble structure with three columns of symbols, the proposed preamble structure only requires two columns of symbols as the preamble...
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