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This paper addresses the prediction of conformal array far field performance with improved precision. The approach is based on the development of high accuracy radiating element models. Focusing on conformal open waveguide arrays, new high accuracy open waveguide models have been developed utilizing excellent fidelity measured data. These models are then employed to quite accurately predict overall...
This paper presents a fuzzy based approach for 3PL (Third Party Logistics) selection. A multi criteria decision making (MCDM) is used for 3PL evaluation. The MCDM proposal for 3PL evaluation incorporates the decisions of multiple decision makers belonging to the Performance Evaluation Team (PET) constituted by a buyer company. The selection is based on overall score obtained by the 3PL. The fuzzy...
The solid state power amplifier applications are in airbone radars, Missiles and communication systems. It offers a peak power output of 400watts. We designed the SSPA using Ghorbani model. Due to the Non Linearity nature of SSPA, both power and spectral efficiency of the signal is reduced. To improve signal power and spectral efficiency of a 16QAM modulated signal, we linearize SSPA by Predistortion...
One of the most inconvenient of Broad Area Semiconductor Lasers is the large amount of spatial modes involved in the output beam and the possible temporal unstabilization due to their interaction. This introduces strong difficulties in the output beam focalization in order to be coupled to fibers or other devices. One possibility to increase the output beam quality of these devices is a spatial modulation...
In this paper, a Distribution STATic COMpensator (DSTATCOM) is proposed for compensation of reactive power and unbalance caused by various loads in distribution system. Distribution static compensator is based on the VSC principle. A D-STATCOM injects a current into the system to correct the voltage sag, swell and interruption An evaluation of a methods is made to derive reference currents for a DSTATCOM...
Dynamic thermal management (DTM) techniques to manage the load on a system to avoid thermal hazards are soon becoming mainstream in today's systems. With the increasing percentage of leakage power, switching off the processors is becoming a viable alternative technique to speed scaling. For real-time applications, it is crucial that under such techniques the system still meets the performance constraints...
With ever-increasing power densities, Dynamic Thermal Management (DTM) techniques have become mainstream in today's systems. An important component of such techniques is the thermal trigger. It has been shown that predictive thermal triggers can outperform reactive ones. In this paper, we present a novel trade-off space of predictive thermal triggers, and compare different approaches proposed in the...
Software reliability assessment has been a vital factor to characterize the quality of any software product quantitatively during testing phase. Over the years many analytical models have been proposed for modeling software reliability growth trends with different predictive capabilities at different phases of testing. Yet we need to develop such single model that can be applied for accurate prediction...
Position and force control are two critical aspects of prosthetic control. Surface electromyographic (sEMG) signals can be used for skeletal muscle force estimation. In this paper, skeletal muscle is considered as a system and System Identification (SI) is used to model sEMG and skeletal muscle force. The recorded sEMG signal is filtered utilizing optimized nonlinear Half-Gaussian Bayesian filter,...
In this paper, the nodal price for real and reactive power considering different reactive power price cost calculation methods for generator reactive power has been presented. The impact of FACTS controllers has also been considered taking their cost function into account. The comparison of fuel costs, reactive power cost, and cost of FACTS devices, and their impact on nodal price determination has...
To simulate electric vehicles, appropriate battery models are required. In this work a model of the battery and a methodology for determining the parameters of a battery model using the catalog data of the batteries and Multiobjective Optimization is proposed. The technique is applied to different battery types and the results are presented.
With increasing power densities, runtime thermal management is becoming a necessity in today's systems, especially so for highly integrated Multi-Processor Systems-on-Chip (MPSoCs). In this paper, we propose a neural network (NN) based approach to implement an on-chip thermal simulator to aid such runtime management for MPSoCs. The proposed method combines the advantage of approximating the thermal...
Skeletal muscle force can be estimated using surface electromyographic (sEMG) . Usually, the surface location for the sensors is near the respective muscle motor unit points. Skeletal muscles generate a spatial EMG signal, which causes cross talk between different sEMG signal sensors. In this study, an array of three sEMG sensors is used to capture the information of muscle dynamics in terms of sEMG...
With the advent of Wireless Sensor Networks (WSN's) covering a whole gamut of applications which is getting broader by the day and it is indeed necessary to study the nuances in WSN out of which aforementioned is one. WSN's consists of large number of deployed sensor nodes and a base node for aggregating data from deployed sensor nodes. Wireless Sensor Network's (WSN) are attribute based and they...
In this paper, we propose a new throughput analysis for IEEE 802.11 distributed coordination function (DCF) considering the real channel conditions and capture effects under arbitrary load conditions employing basic access method. The aggregate throughput of a practical wireless local area (WLAN) strongly depends on the channel conditions. In real radio environment, the received signal power at the...
This paper presents an analytical model and the performance study of IEEE 802.11 distributed coordination function (DCF) for the nonsaturated heterogeneous traffic. In this paper, we modify the Bianchipsilas Markov chain model for the nonsaturated environment and analyze the throughput under several conditions and several set of parameters, with the aim of obtaining the accurate throughput when stations...
This paper presents an analytical model for the performance study of IEEE 802.11 distributed coordination function (DCF). The maximum throughput can be achieved well below the saturated load. The analytical model for finite load must be studied to know the performance of the medium access control (MAC) layer below the saturated load. We extend the Bianchipsilas saturation model for the nonsaturated...
OFDM digital communication system is highly frequency sensitive to carrier frequency offset between transmitter and receiver local oscillators, which disturbs orthogonality among carriers. Consequently, the performance of OFDM system is reduced greatly due to inter-carrier-interference (ICI). In this paper, we have presented a novel approach for the frequency offset estimation of the OFDM communication...
Based on a very simple model, a descrete-time integrating regulator can be designed for a linear time-invariant system. The linear system is not restricted to be scalar with a monotone step respose, as required in previously published literature. The number of tuning parameters in the controller depends on the number of steps in the staircase model which can be properly chosen so that the closed-loop...
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