Search for dissertations about: "Additive noise"

Showing result 16 - 20 of 80 swedish dissertations containing the words Additive noise.

  2. 16. Synchronization and data detection in long-code CDMA systems / Pei Xiao %C Göteborg

    Author : Pei Xiao; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; iterative demodulation; Rayleigh-fading channels; acquisition; tracking; long spreading codes; multiuser detector; additive white Gaussian noise AWGN ; short spreading codes; data detection; synchronization; channel estimation; direct sequence code division multiple access DS-CDMA ; orthogonal modulation; delay estimator; multiple access interference MAI ;

    Abstract : .... READ MORE

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

    Author : Lotfollah Beygi; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; channel model; multidimensional set partitioning; low-complexity de- tector; coded modulation; signal statistics.; nonlinear phase noise; Fiber-optic communications;

    Abstract : 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. READ MORE

  5. 18. Longitudinal study of the impact on hearing from aging, genetic background and environmental exposures in male twins

    Author : Renata Bogo; Karolinska Institutet; Karolinska Institutet; []
    Keywords : Male twins; Longitudinal cohort study; Aging; Genetic influences; Hearing loss Tinnitus; Pure–Tone Average; Threshold shift; Prevalence; Incidence proportion; Noise exposure; Job–Exposure Matrix; Occupational work code;

    Abstract : Background: Hearing loss is a process that normally develops over many years, and the ability to hear high–frequency sounds is often reduced first. Age, repeated exposure to loud noise and other risk factors, diseases, medications and injury, can damage the various structures of the ear and interfere with hearing. READ MORE

  6. 19. Detection of signals corrupted by non-gaussian disturbances

    Author : Jan-Olov Gustavsson; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Signalbehandling; Signal Processing;

    Abstract : The detection of signals in additive, non-Gaussian disturbances is the main theme of this thesis. The disturbances are modeled either by non-Gaussian noise or by Gaussian noise in combination with intersymbol or co-channel interference. READ MORE

  7. 20. Maximum likelihood estimation in signal analysis of MR spectroscopy

    Author : Pia Löthgren; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : Proton magnetic resonance spectroscopy (MRS) is used to determine the concentration of metabolites in organic tissues, or to study metabolic changes in a non-invasive way. The complex-valued magnetic resonance spectroscopy signals are assumed to be disturbed by additive white noise. READ MORE