The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In IUS 2016, we proposed a capacitive micromachined ultrasonic transducer embedded a field effect transistor (CMUT-FET) for 20 MHz operation. As a result, the possibility of high sensitivity in a high-frequency range was verified via a combination of two simulation tools, a 3-D finite element analysis (FEA) for the CMUT part and a technology computer aided design for the FET part. Since the results...
In this paper, we present a full analytical model that can simulate an entire CMUT-FET structure with high accuracy and fast computation. Using the proposed analytical model, electromechanical properties, electrical characteristics (Id-Vg), and pressure sensitivity of the CMUT-FET are simulated and analyzed. The optimal bias point of the CMUT-FET is found to be 1.3 V (Sub-threshold operation), at...
In this paper, a stress index estimation method for which a face image is used is proposed. ROIs (regions of interst) are designated for the measurement of the stress index, and for the conversion of the color system of the designated regions from RGB to YCgCo. In the detected regions, the average value of the Cg per frame was calculated, and a Cg-Signal period was used for the estimation of the stress...
In this paper, we suggested a real-time frequency interference test-bed considering both interferer's frequency and time domain characteristics. Due to the versatile programming capability of universal software radio peripheral (USRP) and LabVIEW, actual frequency interference environments can be easily modeled. Therefore, performance degradation effects at a victim receiver due to actual multiple...
In this paper, we propose a testbed for analyzing performance degradation of multi-input multi-output orthogonal frequency division multiplexing wireless local area network due to wireless personal area network interferer using LabVIEW and universal software radio peripheral (USRP). The proposed system consists of three parts, i.e., victim, interferer, and channel. Both victim and interferer are implemented...
In this paper, we suggest the usage of a visible light identification (VLID) link for an Electronic Shelf Label (ESL) system. The suggested VLID link can provide an accurate individualized identification capacity between customer's smartphone and distant, closely-spaced ESL tags. ESL tag sends its information by switching a liquid crystal display shutter which is located on its surface. A light emitting...
In this paper, we suggested a software-defined radio (SDR)-based frequency interference analysis test-bed designed to consider both frequency and time domain characteristics of the interferer. Due to the versatile programming capability of universal software radio peripheral (USRP) and LabVIEW, performance degradation effects of victim receiver due to various interferer's parameters in both frequency...
In this paper, we suggested a software-defined radio (SDR)-based frequency interference analysis test-bed designed to consider both frequency and time domain characteristics of the interferer. Due to the versatile programming capability of universal software radio peripheral (USRP) and LabVIEW, performance degradation effects of victim receiver due to various interferer's parameters in both frequency...
In this paper, we suggested a software-defined radio (SDR) testbed for analyzing frequency interference between unlicensed devices. Due to the versatile programming capability of universal software radio peripheral (USRP) and LabVIEW, frequency interfering environments can be easily modeled. Therefore, performance degradation effects according to various parameters of interferer and victim receiver...
The demands for high-performance smart mobile devices are growing exponentially every year. Like the PC market, 64b CPUs are needed to meet this demand. Furthermore, mobile GPU performance is becoming increasingly important as mobile game graphics requirements are pushing the limits of GPU capabilities. For an enhanced mobile game user experience, a multi-core GPU is required. CPU/GPU power efficiency...
It presents a circuit configuration, which can synthesize a multilevel output voltage for the use of stand-alone photovoltaic inverter. The proposed system consists of a buck-boost converter, an auxiliary circuit, and an H-bridge inverter. The simple auxiliary circuit, which generates a multilevel output voltage, configures a switch, three diodes, and two batteries. Thanks to the multilevel output...
In this paper, we compare the performance of some different types of time-invariant LDPC convolutional codes. We first confirm the well-known fact that the performance can be increased by increasing the number of delay, i.e. memory size. Then, we show by simulation that increasing the encoder block size may possibly increase the performance when the memory size is fixed, but this must be done properly...
In this paper, we consider the reliability comparison of various regenerating codes for cloud services. By simulations, we compare the performance of such regenerating codes as MBR codes, MSR codes, local reconstruction codes, and LT regenerating codes, in terms of storage overhead, repair read cost, and repair failure probability. We give some discussions on what must be done in the near future.
In this paper, we propose an optimization scheme for degree distributions of LDPC codes that combines differential evolution and iterative simplex algorithm. In the proposed scheme, we find good check and variable nodes degree distribution and threshold by using differential evolution, and then, we further optimize check and variable nodes degree distribution that has enhanced code rate by using an...
Novel high-speed low-power pulse-based flip-flops having a pulse generator controlled by scan input and scan enable signals are presented. The proposed scheme enables the reduction of data-to-output delay by elimination of the MUX-scan logic from the setup time path of flip-flop, at the cost of a small power overhead. The comparison results using the 45 nm CMOS process indicate that the worst-case...
In this paper, we present an analysis on the performance of Plotkin-type UEP codes by using threshold and equivalent channel model under the Gaussian assumption. Specifically, we give a framework on how to assign the rate of each component code of this Plotkin-type UEP code so that the goal of UEP is successfully achieved with far better overall BER performance. The result is surprising in that which...
In this paper, we propose an new admission control scheme jointly taking into account call-level QoS based on the dropping probability of handoff call and packet-level QoS based on the outage probability over threshold in IEEE 802.16e where user mobility is allowed and adaptive modulation and coding (AMC) is employed. The proposed admission control scheme is characterized by both a threshold for handoff...
We analyze the MAC performance of the IEEE 802.15.4 non-beacon mode where both uplink and downlink traffic flows are executed simultaneously and downlink data packets are transmitted by piggyback method. To build the mathematical model of the stochastic behavior of a device with both uplink and downlink traffic flows, we combine the Markov chain model for the uplink transmission in T.O. Kim et al...
This paper aims to develop genetic algorithm (GA) for solving the wastewater minimisation. The optimisation model is formulated as linear programming (LP) and non-linear programming (NLP) for single and multiple contaminants system. Especially GA that is the core of this paper is an algorithm based on the principal of evolution and heredity. The GA included mass balances for every contaminant as well...
We deal with the split-channel MAC where total bandwidth splits into one control channel for RTS/CTS dialogue and several data sub-channels for data packet transmission. We consider the with-reservation scheme which allows successful RTS/CTS dialogue to be stored in a virtual queue for future transmission when all of the data sub-channels are occupied. We obtain the throughput of the split-channel...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.