Essays about: "lobformning"

Showing result 6 - 8 of 8 essays containing the word lobformning.

  1. 6. Differential Beam-Forming Using Two-Dimensional Antenna Arrays in an LTE FDD System

    University essay from Linköpings universitet/Kommunikationssystem; Linköpings universitet/Tekniska fakulteten

    Author : Fredrik Stenmark; [2015]
    Keywords : Antenna Array; Beam Focusing; Beam-Forming; Feedback Process; Long Term Evolution; Precoding;

    Abstract : Basstationer med flera antenner kan aktivt styra signalenergi mot en mottagare med hjälp av lobformning, vilket ger högre datatakt och lägre strömförbrukning än med en enda antenn. Lobformning kräver dock att kanalen skattas till varje antenn och i ett FDD-system måste denna skattning återkopplas till basstationen från mottagaren, vilket innebär en opraktiskt stor overhead, speciellt när loberna blir smalare. READ MORE

  3. 7. Speech enhancement methods in hands-free communication with emphasis on Optimal SNIR Beamformer

    University essay from Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

    Author : Harish Midathala; [2012]
    Keywords : signal to noise ratio; Beamforming; Reverberated and Anechoic; Speech intelligibility; Reverberation.;

    Abstract : A basic speech enhancement can be achieved by the suppression of background noise and reverberation from the clean speech. The point to be noted is to achieve it with a low computational complexity. The aim is to estimate signal arriving optimally from the desired direction in the presence of reverberant-noisy speech signal. READ MORE

  4. 8. Matched Field Beamforming applied to Sonar Data

    University essay from Institutionen för systemteknik

    Author : Tomas Lundström; [2008]
    Keywords : Conventional Beamforming; Nearfield; Bearing Estimation; Distance Estimation; Sonar; MUSIC; Linear array; Spatial Covariance Matrix; Matched Field;

    Abstract : Two methods for evaluating and improving plane wave beamforming have beendeveloped. The methods estimate the shape of the wavefront and use theinformation in the beamforming. READ MORE