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This paper presents a PRIME subnetwork simulation model based on OMNeT++ that reproduces the behaviour of real networks. The developed simulation model uses the most common logical topology of a selected real network provided by a previous monitoring process. Thanks to the developed simulation model, different algorithms and utility applications can be tested in the simulation environment without...
In this paper, a fully digital single-inductor dualoutput (SIDO) DC-DC Buck converter architecture is presented. The proposed converter features a simplified control loop that eliminates duplication of the controller sub blocks and allows for use of a single Pulse Width Modulator (PWM), compensator, and comparator to regulate the two outputs, therefore reducing overall system complexity. A 3rd order...
This paper proposes a modified approach to filter Salt & Pepper Noise by applying Fuzzy logic with auxiliary BDND algorithm and FSM filtering for grayscale images. Main purpose of this algorithm is to provide an efficient method to differentiate unwanted noise pixels with image edge pixels to restore the details and textures in grayscale images. The approach constitutes two phases: one phase detects...
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...
In this paper, channel noise scan approach (CNS) is proposed to efficiently analyze the potential VR-signal coupling issue in the pre-silicon design and the post-silicon debug of the platform development. CNS is based on a new simulation methodology that includes the whole PCB with signals, voltage regulator (VR) networks, and the interaction between the two. The goal of this simulation methodology...
Ring PLLs play an important role in mobile baseband applications. In cases where fine frequency resolution and low jitter are both needed, wideband fractional-N PLL architectures with quantization noise (Q-noise) cancellation are preferred. Phase interpolators (PI) are widely used in recent literature [1-3]. Although the Q-noise is reduced, decreasing supply voltages severely limit the linearity and...
Precision operational amplifiers (opamp) with 30V supply operation have been widely used to support industrial, instrumentation, and other applications [1]. Most of them have been realized with BJT or JFET processes [1] to offer voltage noise PSD better than 10nV/√Hz and offset voltage drift better than 1μV/°C. Recently, opamps with similar specifications have become available using CMOS based processes...
The SAR-assisted pipeline ADC is an energy-efficient architecture for high resolution [1]. Consisting of two low-resolution charge-redistribution SARADCs coupled by a residue amplifier, a SAR-assisted pipeline ADC relaxes the noise requirements of the second stage and enhances the overall ADC speed while maintaining excellent power efficiency [1-4]. However, designs reported in [1,2] rely on power-hungry...
Envelope tracking (ET) prolongs the battery life by modulating the supply of a power amplifier (PA) according to the signal envelope. With this emerging technology, the PA efficiency is greatly improved, whereas the supply modulator (SM) itself needs to provide efficient and accurate envelope tracking for the overall performance of the SM-PA combined system (PA module). The ET technique, meanwhile,...
An improved estimation method for a class of nonlinear hybrid systems has been proposed in this paper using a self-switched R-adaptive Extended Kalman Filter. The term ‘estimation of a hybrid system’ implies state estimation as well as mode estimation of a plant. In hybrid systems, where modes are determined by the output variables, the mode determination may become erroneous due to inaccurately known...
This paper presents a simple method for detection of commutation instants of the extensively used low power brushless DC motors. In the proposed method the commutation signals are obtained without any phase shift circuit which is required in the conventional sensorless control methods. So the overall cost is decreased and the sensorless control is easy to be implemented. In the proposed method, instead...
Digital images are corrupted by impulse noise mainly due to sensor faults of image acquisition devices and adverse channel environment which in turn degrades the image quality. A decision based switching median filter (DBSMF) to restore images corrupted with high density impulse noise is proposed in this paper. The global use of standard median filters for impulse noise removal from corrupted images...
The application of power electronic converters in renewable energy power generation systems like solar/wind power generation and electric vehicle applications is increasing rapidly. Electro Magnetic Interference (EMI) is a major concern in Power Electronic based Energy conversion systems. The EMI issues in the Pulse Width Modulated (PWM) inverter system arises from the high rate of change of voltage...
While all computation generates electromagnetic (EM) side-channel signals, some of the strongest and farthest-propagating signals are created when an existing strong periodic signal (e.g. a clock signal) becomes stronger or weaker (amplitude-modulated) depending on processor or memory activity. However, modern systems create emanations at thousands of different frequencies, so it is a difficult, error-prone,...
This paper studies a new switch variable order affine projection algorithm (APA) for acoustic echo cancellation (AEC). Based on voice activity detection technique, a threshold calculated from the short-time energy of the far-end speech signal is derived to enable the APA to switch between the high- and low- order status. Algorithm convergence can thus be achieved when there is more input excitation...
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...
The output voltages at parallel simultaneous switching output (SSO) channels are affected by impedance of power distribution network (PDN) and SSO patterns. In this paper, a target impedance for PDN is directly extracted from the allowable signal output variations due to the SSO patterns.
DC/DC converters are widely used to provide various power supply voltages required for many electronic components on a board. Though DC/DC converter is more efficient than the linear regulator is, however, the switching noise becomes larger with the increase of the switching frequency. In particular, ringing noises at the sharp rising edge of the switching waveform occurs by the effect of the parasitic...
A 0.6V 10-bit 150MS/s single-channel asynchronous subranging SAR ADC using a settling-time relief technique is presented. The technique extends the allocated DAC settling time with the assistance of a coarse ADC and minimizes digital loop delay so that it can reach high speed and low power at a 0.6V supply. This ADC consumes 0.264mW at 150MS/s in 40nm CMOS technology. It achieves an SNDR of 50.5dB...
DC/DC converters are widely used to produce various power supply voltages required for various electronic components on a board. Though DC/DC converter is more efficient than the linear regulator is, however, the switching noise becomes larger with the increase of the switching frequency. In particular, ringing noises at the sharp rising edge of the switching waveform generated by the effect of the...
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