Sökning: "space-time adaptive processing"

Visar resultat 11 - 13 av 13 avhandlingar innehållade orden space-time adaptive processing.

  1. 11. Ultrawideband-Ultrawidebeam Synthetic Aperture Radar – Signal Processing and Applications

    Författare :Viet Thuy Vu; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : This dissertation presents practical issues in Ultrawideband – Ultrawidebeam (UWB) Synthetic Aperture Radar (SAR) signal processing and crucial applications developed on UWB SAR. In the context of this dissertation, UWB SAR refers to the SAR systems utilizing large fractional bandwidth signals and synthesizing long apertures associated with wide antenna beamwidths. LÄS MER

  3. 12. On MIMO Systems and Adaptive Arrays for Wireless Communication : Analysis and Practical Aspects

    Författare :Mattias Wennström; Michael A. Jensen; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Systemteknik; antenna array; calibration; MIMO system; flat fading; non-linear amplifier; switched parasitic antenna; analog beamformer; adaptive antenna testbed; Systemteknik; Systems engineering; Systemteknik; Signal Processing; signalbehandling;

    Sammanfattning : This thesis is concerned with the use of multiple antenna elements in wireless communication over frequency non-selective radio channels. Both measurement results and theoretical analysis are presented. New transmit strategies are derived and compared to existing transmit strategies, such as beamforming and space-time block coding (STBC). LÄS MER

  4. 13. On Interference Rejection in Wireless Multichannel Systems

    Författare :Göran Klang; KTH; []
    Nyckelord :;

    Sammanfattning : To meet the growing demands for service provisioning usingwireless access, efficient utilization of the available radiospectrum is a key issue of great importance. To achieve highspectrum efficiency, use of spectral efficient modulationmethods in combination with tight physical channel reuse areanticipated in future cellular communication systems. LÄS MER