Sökning: "spread spectrum"

Visar resultat 11 - 15 av 76 avhandlingar innehållade orden spread spectrum.

  1. 11. Multirate Codes and Multicarrier Modulation for Future Communication Systems

    Författare :Pål Frenger; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; channel estimation; code-spread CDMA; DS-CDMA; convolutional codes; interference cancellation; nested convolutional codes; multicarrier modulation; optimum distance spectrum ODS ; rate-compatible punctured convolutional codes RCPC-codes ; OFDM; turbo decoding; rate matching; parallel combinatory signaling; Rayleigh fading;

    Sammanfattning : In this thesis, new detection and modulation methods for multicarrier systems are presented. The proposed multicarrier detectors are based on feedback of previously detected symbols and the idea is to exploit the correlation, both in time between consecutive symbols, and in frequency between neighboring sub-carriers. LÄS MER

  3. 12. Carriage of ESBL (extended spectrum beta-lactamases)-producing bacteria : knowledge, emotional impact and risk assessment

    Författare :Susanne Wiklund; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :Extended-spectrum beta-lactamases;

    Sammanfattning : Antibiotic-resistant bacteria, such as ESBL-producing Enterobacteriaceae, have become a growing public health threat. The overall aim of this thesis was to explore how the increasing prevalence of ESBL-producing bacteria affects different groups among the Swedish population. LÄS MER

  4. 13. Epidemiology of extended-spectrum β-lactamase-producing Escherichia coli

    Författare :Sofia Ny; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Extended-Spectrum β-Lactamase and plasmid mediated AmpC (ESBL/pAmpC)-producing Escherichia coli (E. coli) has during the last decades emerged worldwide and is now an increasing problem in both human and animal health. LÄS MER

  5. 14. Recurrent infection with Extended-Spectrum Beta-Lactamase (ESBL) -producing Enterobacteriaceae

    Författare :Anna Lindblom; Göteborgs universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; ESBL; E. coli; recurrent infection; UTI; AMR; phylogroup; fimH30Rx;

    Sammanfattning : Infections with Extended-Spectrum Beta-Lactamase (ESBL)-producing Enterobacteriaceae (EPE) are increasing globally. The most common EPE are the gut pathogens Escherichia coli (ESBL-E. coli) and Klebsiella pneumoniae (ESBL-K. pneumoniae). LÄS MER

  7. 15. Travel – a risk factor for disease and spread of antibiotic resistance

    Författare :Martin Angelin; Helena Palmgren; Birgitta Evengård; Anders Johansson; Anu Kantele; Umeå universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Accident Prevention; Alcohol Drinking; Anti-Bacterial Agents; Antimalarials; Beta-Lactamases; Drug-Resistance; Bacterial; Enterobacteriaceae; Health Knowledge; Attitudes; Practice; High-Throughput Nucleotide Sequencing; Medication Adherence; Metagenome; Metagenomics; Patient Compliance; Proteobacteria; Risk Reduction Behaviour; Risk-Taking; Safe Sex; Travel medicine; Travel; Vaccination; Infectious Diseases; infektionssjukdomar; mikrobiologi; Microbiology;

    Sammanfattning : As international travel is rapidly increasing, more people are being exposed to potentially more antibiotic resistant bacteria, a changed infectious disease epidemiology, and an increased risk of accidents and crime. Research-based advice is needed to adequately inform travellers about these risks. LÄS MER