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Visar resultat 21 - 25 av 55 avhandlingar som matchar ovanstående sökkriterier.

  1. 21. High-End Performance with Low-End Hardware : Analysis of Massive MIMO Base Station Transceivers

    Författare :Christopher Mollén; Erik G. Larsson; A. Lee Swindlehurst; Linköpings universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Beamforming; distortion; massive MIMO; MIMO; nonlinear hardware; peak-to-average ratio;

    Sammanfattning : Massive MIMO (multiple-input–multiple-output) is a multi-antenna technology for cellular wireless communication, where the base station uses a large number of individually controllable antennas to multiplex users spatially.  This technology can provide a high spectral efficiency. LÄS MER

  3. 22. Contributions to Frequency Offset and Time Delay Estimation

    Författare :Mattias Olsson; Håkan Johansson; Jonny Holmberg; Linköpings universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; time delay estimation; OFDM; carrier frequency offset; Signal processing; Signalbehandling;

    Sammanfattning : The demand for reliable high rate and efficient communication is ever increasing. In this thesis we look at two different problems in such systems, and their possible solutions. LÄS MER

  4. 23. Ultra-Low-Power Analog-to-Digital Converters for Medical Applications

    Författare :Dai Zhang; Atila Alvandpour; Ana Rusu; Linköpings universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : Biomedical systems are commonly attached to or implanted into human bodies, and powered by harvested energy or small batteries. In these systems, analog-to-digital converters (ADCs) are key components as the interface between the analog world and the digital domain. LÄS MER

  5. 24. CMOS Aid Converters For Telecommunications

    Författare :Mikael Gustavsson; Mohammed Ismail; Linköpings universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : In many telecommunications applications, as mobile radio and internet access, analog filters and data converters are needed. The data converters are crucial building blocks that strongly influence the performance and price of the whole system. LÄS MER

  7. 25. Implementation of Flash Analog-to-Digital Converters in Silicon-on-Insulator Technology

    Författare :Erik Säll; Mark Vesterbacka; Bengt E. Jonsson; Linköpings universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; flash analog-to-digital converter; ADC; silicon-on-insulator; SOI; top-down design; dynamic element matching; DEM; thermometer-to-binary encoder; flash ADC modeling; Electronics; Elektronik;

    Sammanfattning : High speed analog-to-digital converters (ADCs) used in, e.g., read channel and ultra wideband (UWB) applications are often based on a flash topology. The read channel applications is the intended application of this work, where a part of the work covers the design of two different types of 6-bit flash ADCs. LÄS MER