Power Control for D2D Underlay Cellular Networks with Imperfect CSI
Permanent link to this recordhttp://hdl.handle.net/10754/623182
MetadataShow full item record
AbstractDevice-to-Device communications underlying the cellular infrastructure is a technology that has recently been proposed as a promising solution to enhance cellular network capabilities. However, interference is the major challenge since the same resources are shared by both systems. Therefore, interference management techniques are required to keep the interference under control. In this work, in order to mitigate interference, we consider centralized and distributed power control algorithms in a one-cell random network model. Differently from previous works, we are assuming that the channel state information may be imperfect and include estimation errors. We evaluate how this uncertainty impacts performances. In the centralized approach, we derive the optimal powers that maximize the coverage probability and the rate of the cellular user while scheduling as many D2D links as possible. These powers are computed at the base station (BS) and then delivered to the users, and hence the name
CitationMemmi A, Rezki Z, Alouini M-S (2016) Power Control for D2D Underlay Cellular Networks with Imperfect CSI. 2016 IEEE Globecom Workshops (GC Wkshps). Available: http://dx.doi.org/10.1109/GLOCOMW.2016.7849006.
Showing items related by title, author, creator and subject.
Postfault Control of Scalar (V/f) Controlled Asymmetrical Six-Phase Induction MachinesAbdel-Khalik, Ayman S.; Hamdy, Ragi A.; Massoud, Ahmed M.; Ahmed, Shehab (IEEE Access, Institute of Electrical and Electronics Engineers (IEEE), 2018-10-05) [Article]With the accelerated development in semiconductor power devices along with the dictated rigorous reliability standards in some industrial sectors, the application of a medium-voltage high-power multiphase induction machine with multiple three-phase windings is now considered as a leading technology in high-power safety-critical applications. This paper proposes a parameter-independent postfault control scheme for an asymmetrical six-phase induction machine based on simple scalar V/f control, which can successfully ensure the most common postfault scenarios used in this respect, namely, equal stator copper loss and minimum copper loss modes. Moreover, the proposed controller can effectively be used in either open-loop or closed-loop speed control modes. The proposed controller is experimentally validated using a 1.5-kW prototype induction machine. The effect of the neutral arrangement on the dynamic performance is also explored.
The compute and control for adaptive optics (CACAO) real-time control software packageGuyon, Olivier; Sevin, Arnaud; Ltaief, Hatem; Skaf, Nour; Martinache, Frantz; Gratadour, Damien; Cetre, Sylvain; Males, Jared R.; Lozi, Julien; Clergeon, Christophe S.; Bernard, Julien; Norris, Barnaby; Wong, Alison; Sukkari, Dalal E. (Adaptive Optics Systems VI, SPIE, 2018-07-11) [Conference Paper]The compute and control for adaptive optics (cacao) package is an open-source modular software environment for real-time control of modern adaptive optics system. By leveraging many-core CPU and GPU hardware, it can scale up to meet the demanding computing requirements of current and future high frame rate, high actuator count adaptive optics (AO) systems. cacao's modular design enables both simple/barebone operation, and complex full-featured AO control systems. cacao's design is centered on data streams that hold real-time data in shared memory along with a synchronization mechanism for computing processes. Users and programmers can add additional features by coding modules that interact with cacao's data stream format. We describe cacao's architecture and its design approach. We show that accurate timing knowledge is key to many of cacao's advanced operation modes. We discuss current and future development priorities, including support for machine learning to provide real-time optimization of complex AO systems.
Phase control of 2D binary hydroxides nanosheets via controlling-release strategy for enhanced oxygen evolution reaction and supercapacitor performancesWei, Min; Li, Jing; Chu, Wei; Wang, Ning (Journal of Energy Chemistry, Elsevier BV, 2019-01-09) [Article]An OH-slow-release strategy was established to controllably tune the (α- and β-) phase of nickel cobalt binary hydroxide in the presence of ammonium chloride. Ammonium chloride is added to the ionic solution to regulate the pH of the solution and slow down the release of OH, effectively regulating the phase, nanostructure, interlayer spacing, surface area, thickness, and the performance of binary Ni–Co hydroxide. The ion-slow-release mechanism is conducive to the formation of α-phase with larger interlayer spacing and thinner flakes rather than β-phase. Attributed to the enlarged interlayer spacing, thinner nanosheets, and more exposed active sites, the resultant α-phase hydroxides (NCNS-5.2), displayed much lower over potential of 285 mV with respect to the dense-stacked β-phase hydroxides (362 mV) for OER at 10 mA/cm. It also exhibited high specific capacitance of 1474.2 F/g, when tested at 0.5 A/g within a voltage range of 0–0.45 V vs. Hg/HgO. This composite was also stable for water oxidation reaction and supercapacitor. The proof-of-concept of using controlled-release agent may provide suggestive insights for the material innovation and a variety of applications.