Search for dissertations about: "Power Efficiency"

Showing result 1 - 5 of 989 swedish dissertations containing the words Power Efficiency.

  1. 1. Cooperative Communications Link Reliability and Power Efficiency

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Tafzeel ur Rehman Ahsin; KTH.; [2012]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Cooperative Communications; Link Reliability; Power Efficiency; Energy Efficiency; Network Coding; Cooperative Relaying; SRA - ICT; SRA - Informations- och kommunikationsteknik;

    Abstract : Demand for high data rates is increasing rapidly for the future wireless generations, due to the requirement ofubiquitous coverage for wireless broadband services. More base stations are needed to deliver these services, in order tocope with the increased capacity demand and inherent unreliable nature of wireless medium. READ MORE

  2. 2. High efficiency power amplifiers for wireless communications

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Hossein Mashad Nemati; [2009]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; supply modulation; Power amplifier; LDMOS; transmitter architecture; efficiency; GaN; MMIC; load modulation; mHEMT;

    Abstract : This thesis presents state-of-the-art high efficiencyharmonically-tuned power amplifiers (PAs) and investigates thecharacteristics and potentials of such amplifiers in two of the mostpromising efficiency enhancement techniques, dynamic supply and load modulation.In this work, a 10 W LDMOS harmonically-tuned PA with 80% power-added-efficiency (PAE) isrealized at 1 GHz. READ MORE

  3. 3. High-efficiency Power Amplification Techniques for Wireless Transmitters

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Hossein Mashad Nemati; [2010]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; load modulation; LDMOS; supply modulation; GaN HEMT; Power amplifier; wireless communications.; GaAs mHEMT; efficiency;

    Abstract : The low efficiency of existing power amplifiers (PAs) is causing excessive energy consumption in wireless systems. Improving the PA efficiency is therefore of great environmental and economical importance. READ MORE

  4. 4. Elements of the Asia Pacific gas market : market power and efficiency

    University dissertation from Luleå : Luleå tekniska universitet

    Author : Bo Jonsson; Luleå tekniska universitet.; [1999]
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Economics; Nationalekonomi;

    Abstract : Natural gas trade in the Asian Pacific market is heavily dependent on the demand from Japan, which imports around 75% of the gas traded as LNG (liquefied natural gas) in the region. This study argues that the buyers in Japan, through cooperation have the potential to exert the market power that their large market share provides them with. READ MORE

  5. 5. Waste-heat Recovery Using Thermoelectricity and Silicon Carbide Power Electronics

    University dissertation from KTH Royal Institute of Technology

    Author : Arash Edvin Risseh; KTH.; [2019]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Thermoelectricity; Power converter; Silicon Carbide; MOSFET; Power management; Thermoelectric generator; Renewable energy; Vehicle; Power electronic; Waste heat; Ultra-low inductance; Power module; Termoelektrisk energiomvandling; Kiselkarbid MOSFET; Effektomvandlare; Förnybar energikälla; Effektelektronik; Spillvärme; Effektmodul; Låg induktiv module; Electrical Engineering; Elektro- och systemteknik;

    Abstract : Energy consumption in the world has increased continuously due to a growing population and increased energy consumption per capita. Moreover, the largest part of consumed energy still comes from fossil sources which in 2016 was more than 130 PWh. READ MORE