Sökning: "Fractional Delay"

Hittade 5 uppsatser innehållade orden Fractional Delay.

  1. 1. Detection of Emergency Signal in Hearing Aids using Neural Networks

    Master-uppsats, Blekinge Tekniska Högskola/Institutionen för tillämpad signalbehandling; Blekinge Tekniska Högskola/Institutionen för tillämpad signalbehandling

    Författare :Vamshi Krishna Lakum; Arshini Gubbala; [2014]
    Nyckelord : Microphone Array; Fractional Delay; Beam Former; Adaptive Algorithms; Neural Networks;

    Sammanfattning : ABSTRACT The detection of an emergency signal can be estimated by the cancellation of surrounding noise and achieving the desired signal in order to alert the automobilist. The aim of the thesis is to detect the emergency signal arriving nearer to the automobilist carrying hearing aids. LÄS MER

  2. 2. FPGA Implementation of Flexible Interpolators and Decimators

    Master-uppsats, Linköpings universitet/Linköpings universitet/ElektroniksystemTekniska högskolan

    Författare :Dabbugottu VenkataVikram; [2013]
    Nyckelord :Interpolation; Decimation; Linear-phase FIR interpolation; VHDL implementation of interpolators and decimators;

    Sammanfattning : The aim of this thesis is to implement flexible interpolators and decimators onField Programmable Gate Array (FPGA). Interpolators and decimators of differentwordlengths (WL) are implemented in VHDL. The Farrow structure is usedfor the realization of the polyphase components of the interpolation/decimationfilters. LÄS MER

  3. 3. 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. 4. Simulation of microphone inaccuracies and robustness analysis of Beamformers inside a reverberant environment

    Master-uppsats, Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

    Författare :ADITYA SRI TEJA PALANKI; [2012]
    Nyckelord :Speech Enhancement; Beamformer; Reverberation; Hearing Aids; Noise Cancellation; Fractional Delay; Binaural hearing; Source localization; Echo Cancellation;

    Sammanfattning : All Speech Processing Equipments like noise cancelling headphones and Hearing aids should be able to filter different kinds of interfering signals and present a clear sound to the listener. The effect of these interfering signals varies depending on the surroundings. LÄS MER

  5. 5. Closed loop power control for LTE uplink

    Master-uppsats, Blekinge Tekniska Högskola/Avdelningen för telekommunikationssystem

    Författare :Bilal Muhammad; [2008]
    Nyckelord :LTE; Closed loop power control; open loop power control; SC-FDMA; 5th percentile user bit rate; mean per user bit rate; SINR; power utilization;

    Sammanfattning : This thesis study involves designing, implementing and testing of a novel radio resource control algorithm for the closed loop power control in the LTE uplink. Different values of the path loss compensation factor are investigated in the range 0.7-1.0 and an optimal value of 0. LÄS MER