Energy Portfolio Assessment Tool (EPAT): Sustainable Energy Planning Using the WEF Nexus Approach - Texas Case Study

The future energy portfolio at the national and subnational levels should consider its impact on water resources and environment. Although energy resources are the main contributors to the national economic growth, these resources must not exploit other primary natural resources. A study of the connections between energy and natural systems, such as water, environment and land, is required prior to proceeding to energy development. Policy makers are in need of a tool quantifying the interlinkages across energy, water and the environment, while demonstrating the consequent trade-offs across the nexus systems. The Energy Portfolio Assessment Tool (EPAT) is a tool enabling the user to create different energy portfolio scenarios with various energy and electricity sources, and evaluate the scenario’s sustainability environmentally and economically. The Water-Energy-Food nexus systematic approach is the foundation of the EPAT framework. Texas is a suitable geographical region to study and assess the current and future implications of energy portfolios. The research evaluates the impact of the current and projected Texas energy portfolios on water and the environment, taking into consideration production, generation and production change. The three scenarios are: Reference Case - 2015, CPP with Energy Reference Case - 2030, and No CPP with Energy Reference Case - 2030. In the presence of the CPP, total water withdrawal is expected to decrease significantly, while total water consumption is projected to experience a shy decrease due to the increase in water consumption in electricity generation caused by the new electricity mix. The CPP is successful in decreasing emissions, but is accompanied by tradeoffs, such as increasing water consumption and land use by electricity generation. The absence of the CPP will lead to an extreme surge in total water withdrawn, consumed and emissions. Therefore, conservation policies should move from the silo to the nexus mentality to avoid unintended consequences as improving one part of the nexus could end up worsening the other parts

An Analog CMOS Pulse Energy Detector for IR-UWB Non-Coherent HDR Receiver

International audienc

Intégration et performances d'architectures de transmetteur radio ULB

Cette thèse s'intéresse à l'étude des performances et à l'implémentation d'un transmetteur ULB (3.1-10.6 GHz) basé sur de la radio impulsionnelle en configuration multibandes. Cette thèse peut être divisée en trois parties. La première partie concerne la réalisation des tests fonctionnels du système ULB adopté en environnement réel permettant d'établir un bilan de liaison réel. Dans la deuxième partie, nous étudions les performances du système ULB au sens du traitement de signal en évaluant l'effet du canal multitrajet ULB sur la statistique de l'énergie du signal reçu et en calculant la capacité du canal avec une détection d'énergie. La troisième partie concerne l'étude d'implémentation d'un détecteur d'énergie analogique en technologie CMOS opérant dans la bande de fréquence 3.1-10.6 GHz en tenant compte des spécificités des applications très haut débit en termes de faible consommations d'énergie, de faible coût de fabrication et de taille réduite de puce.This Ph.D. thesis concerns with the study of the performance and the implementation of a UWB (3.1-10.6 GHz) transceiver based on Impulse Radio (IR) in a multiband configuration. This thesis is decomposed into three parts. In the first part, functional tests in real environment were realized in order to establish a real link-budget of the system. The second part presents the study of the performance of the energy-based receiver with a UWB channel model. The effects of the channel on the statistical distribution of the energy of the received signal are evaluated and the channel capacity is calculated. The third part concerns with the study of a suitable on-chip implementation in CMOS technology of a pulse energy detector operating in the 3.1- 10.6 GHz UWB band for a multi-band OOK UWB receiver. The pulse energy detector must conform with the requirements of UWB high data rates applications in terms of low cost, low power consumption and reduced size chips.RENNES-INSA (352382210) / SudocSudocFranceF

A Multi-Band IR-UWB HDR Transceiver: Architecture and Indoor Channel Measurements

ISBN: 978-1-4244-4316-1 - WOSInternational audienceThis paper presents an architecture of a lowpower non-coherent multi-band IR-UWB transceiver. The proposed system was studied and a prototype was realized. Also, it concerns with the study of the performance and a future implementation of such a system based on energy detection. Channel measurements performed in both LOS and NLOS short-range communications in real indoor environment are provided. Finally, the performance of a communicating system based on energy detection and a data rate evaluation are given

Performance and Implementation Evaluation of TR PAPR Reduction Methods for DVB-T2

High Peak to Average Power Ratio (PAPR) is a critical issue in multi-carrier communication systems using Orthogonal Frequency Division Multiplexing (OFDM), as Second Generation Terrestrial Digital Video Broadcasting (DVBT2) system. This problem can result in large performance degradation due to the non-linearity of the High Power Amplifier (HPA) or in its low power efficiency. In this paper, we evaluate the performance of different Tone Reservation based techniques for PAPR reduction in DVB-T2 context. Also, we propose an iterative TR based technique called "One Kernel One Peak" (OKOP). Simulation results and performance comparison of these techniques in term of gain in PAPR reduction, mean power variation and complexity will be given

Peak to Average Power Ratio sensor for Green Cognitve Radio

International audienceHigh Peak to Average Power Ratio (PAPR) is a critical issue in multi-standard and multi-carrier communication systems. This problem can result in large performance degradation due to the non-linearity of the High Power Amplifier (HPA) or in low power efficiency. The Cognitive Radio (CR) is an efficient technology to meet the Green communications concept. In this paper, we study the PAPR reduction in the context of amplifying signals of several standards. Also, we propose a scenario allowing an opportunistic spectrum access in the context of Cognitive Radio without degrading the system performance keeping the same Input Back-Off (IBO) and thus the same efficiency of the power amplifier. This scenario uses particular Cognitive Radio (CR) sensors, a Hole Detector sensor and a PAPR sensor. The principle of the proposed method will be described. Also, simulation results based on two Tone Reservation (TR) based PAPR reduction techniques will be given in order to validate the proposed concept

Performance of a Low-Power Multi-Band IR-UWB Transceiver based on Energy Detection

ISBN: 978-1-4244-4316-1 - WOSInternational audienc

Vertical Handover Algorithm for WIFI-WiMax Systems Using Partial Reconfiguration Technique

International audienceThis paper deals with VHA for wireless commuincations. Its combines decision and partial reconfiguratio

Demo WIFI-WiMax Vertical Handover on an ARM-FPGA Platform with Partial Reconfiguration

International audienceIn recent wireless networks, end-nodes are capable of detecting the existence of multiple wireless standards. In this context, it becomes very interesting to design an on-line reconfigurable communication system controlled by a Vertical Handover Algorithm (VHA) that allows selecting the best available wireless standard. In this demo, we propose implementing the Partial Reconfiguration (PR) technique on a platform based on ARM-FPGA SoC device to apply vertical handover between two wireless communication standards; WIFI and Wimax. The demo simulates the mobility of an end-node in an WIFI-WiMax network on a GUI Interface connected to a ZedBoard. On the board, the VHA senses specific parameters and decides accordingly to reconfigure a unified chain before applying partial reconfiguration on the device

ARM-FPGA-based platform for reconfigurable wireless communication systems using partial reconfiguration

International audienceToday, wireless devices generally feature multiple radio access technologies (LTE, WIFI, WIMAX, ... ) to handle a rich variety of standards or technologies.These devices should be intelligent and autonomous enough in order to either reach a given level of performance or automatically select the best available wireless technology according to standards availability. On the hardware side, system on chip (SoC) devices integrate processors and field-programmable gate array (FPGA) logic fabrics on the same chip with fast inter-connection. This allows designing software/hardware systems and implementing new techniques and methodologies that greatly improve the performance of communication systems. In these devices, Dynamic partial reconfiguration (DPR) constitutes a well-known technique for reconfiguring only a specific area within the FPGA while other parts continue to operate independently. To evaluate when it is advantageous to perform DPR, adaptive techniques have been proposed. They consist in reconfiguring parts of the system automatically according to specific parameters. In this paper, an intelligent wireless communication system aiming at implementing an adaptive OFDM-based transmitter and performing a vertical handover in heterogeneous networks is presented. An unified physical layer for WIFI-WIMAX networks is also proposed. The system was implemented and tested on a ZedBoard which features a Xilinx Zynq-7000-SoC. The performance of the system is described, and simulation results are presented in order to validate the proposed architecture