Sökning: "Gaussian channel"

Visar resultat 1 - 5 av 86 avhandlingar innehållade orden Gaussian channel.

  1. 1. Radio Channel Prediction Based on Parametric Modeling

    Författare :Ming Chen; Chalmers University of Technology; []
    Nyckelord :Wireless communications; channel prediction; GLRT; CRLB; NLLS; polynomial phase signal; Kalman filter; NILS.; sinusoidal modeling; channel modeling; MIMO;

    Sammanfattning : Long range channel prediction is a crucial technology for future wireless communications. The prediction of Rayleigh fading channels is studied in the frame of parametric modeling in this thesis.Suggested by the Jakes model for Rayleigh fading channels,deterministic sinusoidal models were adopted for long rangechannel prediction in early works. LÄS MER

  2. 2. Channel Prediction and Target Tracking for Multi-Agent Systems

    Författare :Markus Fröhle; Chalmers University of Technology; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Gaussian processes; multitarget tracking; channel prediction; extended target tracking; Multi-agent system; posterior fusion; location uncertainty;

    Sammanfattning : Mobile moving agents as part of a multi-agent system (MAS) utilize the wireless communication channel to disseminate information and to coordinate between each other. This channel is error-prone and the transmission quality depends on the environment as well as on the configuration of the transmitter and the receiver. LÄS MER

  3. 3. Voronoi-Based Coding

    Författare :Erik Agrell; Chalmers University of Technology; []
    Nyckelord :Voronoi diagram; linear block code; Gaussian channel; neighbor descent; nearest neighbor search algorithm; computational geometry; asymptotic theory; source coding; lattice; vector quantization; soft-decision decoding; index assignment; channel coding; complexity;

    Sammanfattning : The performance of a digital communication system can generally be improved by increasing the number of variables being jointly coded. In this sense, it is desirable to have, e.g., higher-dimensional quantizers, longer channel codes, and more users in a multiple-access system. LÄS MER

  4. 4. Modeling of Multiple-Input Multiple-Output Radio Propagation Channels

    Författare :Kai Yu; KTH; []
    Nyckelord :Antenna Array; Wireless Communications; MIMO Channel Model; MIMO Channel Measurements; MIMO Channel Capacity;

    Sammanfattning : In recent years, multiple-input multiple-output (MIMO)systems appear to be very promising since they can provide highdata rates in environments with sucient scattering byexploiting the spatial domain. To design a real MIMO wirelesssystem and predict its performance under certain circumstances,it is necessary to have accurate MIMO wireless channel modelsfor dierent scenarios. LÄS MER

  5. 5. Channel-Aware Multilevel Coded Modulation for Coherent Fiber-Optic Communications

    Författare :Lotfollah Beygi; Chalmers University of Technology; []
    Nyckelord :channel model; multidimensional set partitioning; low-complexity de- tector; coded modulation; signal statistics.; nonlinear phase noise; Fiber-optic communications;

    Sammanfattning : The past decades have shown an ever-increasing demand for high-rate Internet services, motivating a great effort to increase the spectral efficiency of optical networks. In general, fiber-optic links are non-Gaussian, and in contrast to additive white Gaussian noise (AWGN) channels, there is no standard framework for quantifying fundamental limits or designing capacity-approaching coding schemes for such channels. LÄS MER