Sökning: "Graph signal"

Visar resultat 1 - 5 av 40 avhandlingar innehållade orden Graph signal.

  1. 1. Graph Signal Processing Meets Machine Learning

    Författare :Arun Venkitaraman; Peter Händel; Antonio G. Marques; KTH; []
    Nyckelord :Signal processing; Graph signal; Machine learning; Estimation; Electrical Engineering; Elektro- och systemteknik;

    Sammanfattning : Graph signal processing is an emerging paradigm in signal processing which took birth in the search for a set of consistent mathematical tools to analyze signals which occur over networks or graphs. The viewpoint of signals through graphs is universal and applicable to a large variety of diverse real-world problems. LÄS MER

  3. 2. Low-density parity-check codes : unequal error protection and reduction of clipping effects

    Författare :Sara Sandberg; David Declercq; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Signalbehandling; Signal Processing;

    Sammanfattning : The invention of low-density parity-check (LDPC) codes made reliable communication possible at transmission rates very close to the theoretical limit predicted by Shannon. However, communication close to the Shannon limit requires very long codes and results in long delay and high encoder and decoder complexity. LÄS MER

  4. 3. Interference-based scheduling in spatial reuse TDMA

    Författare :Jimmi Grönkvist; Jens Zander; Anthony Ephremides; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Signal processing; Signalbehandling;

    Sammanfattning : Spatial reuse TDMA has been proposed as an access scheme for multi-hop radio networks where real-time service guarantees are important. The idea is to allow several radio terminals to use the same time slot when possible. A time slot can be shared when the radio units are geographically separated such that small interference is obtained. LÄS MER

  5. 4. On the Impact of Phase Noise in Communication Systems –- Performance Analysis and Algorithms

    Författare :Rajet Krishnan; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Oscillator; phase noise; sum-product algorithm SPA ; random matrix theory; variational Bayesian method; massive MIMO; symbol error probability; maximum a posteriori MAP detection; constellations; extended Kalman filter EKF ; maximum likelihood ML detection; mutual information; multiple-input multiple-output MIMO ; factor graph; free probability.;

    Sammanfattning : The mobile industry is preparing to scale up the network capacity by a factor of 1000x in order to cope with the staggering growth in mobile traffic. As a consequence, there is a tremendous pressure on the network infrastructure, where more cost-effective, flexible, high speed connectivity solutions are being sought for. LÄS MER

  7. 5. Classification and Localization of Vehicle Occupants Using 3D Range Images

    Författare :Pandu Ranga Rao Devarakota; Bjorn Ottersten; Hamid Krim; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Signal processing; Signalbehandling;

    Sammanfattning : This thesis deals with the problem of classifying automotive vehicle occupants and estimating their position. This information is critical in designing future smart airbag systems providing maximum protection for passengers. LÄS MER