Due to expansion of photonic crystal fiber (PCF) based optical devices in optical communication networks, the connection process between conventional optical fibers (COF) as transmission medium and these devices has attracted the researchers. Considering the splice joint between the COF and PCF, in this paper, the fundamental core and cladding modes are analyzed by scalar […]
We investigate the effect of ASE(Amplified Spontaneous Emission) on the gain modulation, that also referred to overmodulation. The gain modulation is the low-frequency (kHz) amplitude modulation of the EDFA pump and the communication signal used for propagating line monitoring information. We develop the model of Novak and Moesle (2002), by including ASE, that they neglected. […]
One of the methods in creating disturbance in radar is to apply appealing jammer. These jammers send strong signals like target-return signals into radar. If these signals enter from main lobe of radar antenna, create false targets in different ranges. Besides if they enter from secondary lobes, radar receiver is not able to distinguish between […]
A complimentary topology is used incorporating TSMC 0.18 mm process to design a CMOS VCO with the center frequency of 5.4 GHz. Simulation results showed tuning range of 13%. The phase noise at 1 MHz offset was measured to be -118.7 dBc/Hz. The VCO core power consumption was 3.3 mW when the power supply voltage […]
During the last few years, evaluation of MIMO systems capacity has been expanded, due to more bandwidth demands. In this paper, after reviewing the previous works, a new formula for MIMO systems capacity, in the case of uniformly distributed channel error is given. While in previous works, Gaussian distribution is the preliminary assumption of almost […]
In this paper, the synthesis of switching H2/H∞ controller is considered which achieves a minimum bound on the H2 performance level, while satisfying the H∞ performance. The proposed hybrid control scheme is based on a fuzzy supervisor which manages the combination of controllers. A convex formulation of the two controllers leads to a structure which […]
By the time-frequency transformations like wavelet and chaos theory to find the feature from sub-bands, it is possible to diagnose the epilepsy although there are some noises and signals. To decompose the EEG into sub-bands such as delta, theta, alpha, beta and gamma, wavelet analysis is used. Chaos theory is used to compute standard deviation, […]
Sleep spindles are one of the most important transient waveforms found in the sleep EEG signal. Here, we introduce a two-stage procedure based on artificial neural networks for the automatic recognition of sleep spindles (SS) in a 19-channel electroencephalographic signal. In the first stage, a pre-processing perception is used for enhancing overall detection and also […]
Nowadays, micro motors have widespread applications in the industry. However, not many references exist about these motors. To remove this problem, a comprehensive review on micro motors is presented in this paper. For this purpose, different type of micro motors discussed and their potential and challenges are addressed. Besides, a comparison between electrostatic and electromagnetic […]
In this paper, we examine several frameworks for NCS simulation: a MATLAB-based package called True Time, the Agent/Plant addition to the ns-2 network simulator, and other MATLAB -based frameworks. We analyze the accuracy, speed, and ease of use of two different methods of simulating system dynamics using the Agent/Plant extension to ns-2. We also introduce […]
