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Semi-Blind Reception Using Joint Channel Estimation in IDMA Systems

International Journal of communications, Network and System Sciences 2012年第7期5卷 430-435页

作者： Abdelkrim Hamza Ali Kazem Gérard Salut CNRS LAAS 7 Avenue du Colonel Roche Toulouse France Univ. de Toulouse LAAS Toulouse France lcpts laboratoire de communication et du traitement du signal FEI-USTHB Alger Algérie

In this paper a bi-directional system based on linear channel estimation and data detection using turbo detection algorithm is proposed. By combining channel estimation with an iterative chip-by-chip detection process (inner loop) in an iterative way (outer loop), communications performance can be further increased. We present results on blind reception in case of Interleave Division Multiple Access (IDMA) system when the channel coefficients are unknown. We develop a low-complexity iterative joint channel/code estimation method. The philosophy of the turbo processing is the iterative exchange of related information which yields a substantial improvement of the overall system performance. We analyze the achievable performance of the iterative system proposed. Simulation results demonstrate the efficiency of the proposed algorithms.

关键词： Channel Estimation IDMA Multiuser detection

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Management of Peak Loads in an Emerging Electricity Market

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Energy Engineering 2022年第6期119卷 2637-2654页

作者： Edwin N.Mbinkar derek Ajesam Asoh Jerome Ndam Mungwe Livinus Songyuh Emmanuel Lamfu laboratoire de Génie Electrique Mécatronique et Traitement du SignalENSPYUniversitéde YaoundéIYaoundeCameroun department of Electrical and Electronic Engineering National Higher Polytechnic Institute(NAHPI)University of BamendaBamendaCameroon department of Electrical and Power Engineering Higher Technical Teacher Training College(HTTTC)University of BamendaBamendaCameroon Mekin Hydroelectric development Corporation MeyomessalaCameroon ENEO Cameroun S.A. DoualaCameroon

An electricity market is a trading platform provided by the actors in the electricity sector to sell and buy electricity while maintaining the stability of the transmission network and minimizing energy *** management of electrical energy for rational use consists of all the operations that the consumers can carry out in order to minimize their electricity bill,while the producers optimize their benefits and the transmission *** reduction of active and reactive power consumption and the smoothing of daily and yearly load profiles are the main objectives in this *** developed countries already have properly functioning electricity markets,but developing countries are still in their infancy of deregulated electricity *** major tools used in smoothing the load profiles include decentralized generation,energy storage and demand response.A load power smoothing control strategy is proposed to smooth the load power fluctuations of the distribution *** required power change is determined by evaluating the power fluctuation rate of the load,and then the required power change is allocated to some generators or to some stored ***,the consumers are made to curtail their power *** ideas proposed in this work provide important opportunities for energy policy makers and *** ideas would only be feasible if there exists real-time communication among the actors in the electricity *** results indicate that as much as 1100 Megawatt-hours of energy can be stored for smoothing the load profile,when applied to the Southern Interconnected Grid of the Cameroon power system;and that Time of Use(TOU)pricing could be used instead of rotating blackouts in case of energy shortage.

关键词： Peak load electricity markets decentralized generation energy storage demand response

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