Sökning: "Side Lobe Suppression"

Hittade 3 uppsatser innehållade orden Side Lobe Suppression.

  1. 1. An Evaluation of Interpolation and Oversampling Effects on Image Quality in Synthetic Aperture Radar Processing with Global Back-projection

    Magister-uppsats, Blekinge Tekniska Högskola/Institutionen för tillämpad signalbehandling

    Författare :Andreas Hartman; [2014]
    Nyckelord :Synthetic Aperture Radar; Global Back-projection; Image Quality; Side Lobe Suppression;

    Sammanfattning : For time domain SAR processing algorithms, such as Global Back-projection, interpolation becomes a part of the implementation. In order for the interpolation to yield good results, the oversampling rate used in the sampling of the original data may constitute an important factor. LÄS MER

  3. 2. Adaptive Sub band GSC Beam forming using Linear Microphone-Array for Noise Reduction/Speech Enhancement.

    Master-uppsats, Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

    Författare :Mamun Ahmed; [2012]
    Nyckelord :Generalized Side lobe Canceller GSC ; Blocking matrix; Microphone array; Sub band; SNR. ;

    Sammanfattning : This project presents the description, design and the implementation of a 4-channel microphone array that is an adaptive sub-band generalized side lobe canceller (GSC) beam former uses for video conferencing, hands-free telephony etc, in a noisy environment for speech enhancement as well as noise suppression. The side lobe canceller evaluated with both Least Mean Square (LMS) and Normalized Least Mean Square (NLMS) adaptation. LÄS MER

  4. 3. Adaptive Speech enhancement system using Linear Microphone-array for noise Reduction

    Master-uppsats, Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

    Författare :Jeevan Reddy Yarragudi; [2012]
    Nyckelord :Speech enhancement; Beam former; Generalized side lobe canceler; LMS algorithm ;

    Sammanfattning : A major part of the interaction between humans takes place via speech communication. It is very difficult to understand speech signals in presence of background noise for the normal listeners and hearing impaired persons. The human speech and hearing organ is inherently sensitive to interfering noise. LÄS MER