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Design of Computationally Efficient Sharp FIR Filter Utilizing Modified Multistage FRM Technique for Wireless Communications Systems

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Journal of Electronic Science and Technology 2019年第2期17卷 185-192页

作者： tirthadip sinha Jaydeb Bhaumik Department of Electronics and Communication Engineering Haldia Institute of Technology Haldia 721657 India Department of Electronics and Tele-Communication Engineering Jadavpur University Kolkata 700032 India

Modern wireless communications gadgets demand multi-standard communications facilities with least overlap between different input radio channels. A sharp digital filter of extremely narrow transition-width with lower stop band ripples offers alias-free switching among the preferred frequency bands. A computationally competent low pass filter (LPF) structure based on the multistage frequency response masking (FRM) approach is proposed for the design of sharp finite impulse response (FIR) filters which are suitable for wireless communications applications. In comparison of basic FRM with other existing multistage FRM structures, the proposed structure has a narrow transition bandwidth and higher stop band attenuation with significant reduction in terms of the number of computational steps. A design example is incorporated to demonstrate the efficiency of the proposed approach. Simulation results establish the improvement of the proposed scheme over other recently published design strategies.

关键词： Multistage frequency response masking narrow transition-width sharp finite impulse response filter wireless communications

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Risk assessment of microgrid aggregators considering demand response and uncertain renewable energy sources

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Journal of Modern Power Systems and Clean Energy 2019年第6期7卷 1619-1631页

作者： tirthadip GHOSE Harsh Wardhan PANDEY Kumar Raja GADHAM Department of Electrical and Electronics Engineering Birla Institute of TechnologyMesraRanchiIndia

In power market environment,the growing importance of demand response(DR)and renewable energy source(RES)attracts more for-profit DR and RES aggregators to compete with each other to maximize their ***,the intermittent natures of these alternative sources along with the competition add to the probable financial risk of the *** objective of the paper is to highlight this financial risk of aggregators in such uncertain environment while estimating DR magnitude and power generated by *** work develops DR modeling incorporating the effect of estimating power at different confidence levels and uncertain participation of *** this paper,two well-known risk assessment techniques,value at risk and conditional value at risk,are applied to predict the power from RES and DR programs at a particular level of risk in different scenarios generated by Monte Carlo *** establish the linkage between financial risk taking ability of individuals,the aggregators are classified into risk neutral aggregator,risk averse aggregator and risk taking *** paper uses data from Indian Energy Exchange to produce realistic results and refers certain policies of Indian Energy Exchange to frame mathematical expressions for benefit function considering uncertainties for each type of three *** results show the importance of assessing the risks involved with two unpredictable variables and possible impacts on technical and financial attributes of the microgrid energy market.

关键词： Aggregator Demand response Financial risk Value at risk Conditional value at risk Benefit analysis

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