Sökning: "vector quantization"

Visar resultat 6 - 10 av 19 uppsatser innehållade orden vector quantization.

  1. 6. Implementing Linear Predictive Coding based on a statistical model for LTE fronthaul

    Master-uppsats, Lunds universitet/Institutionen för elektro- och informationsteknik

    Författare :Ghassan Nakkoul; Mohammad Shohag Hassan Kaikobad; [2016]
    Nyckelord :Entropy; LTE fronthaul; RRH; BBU; C-RAN; Quantization; LTE downlink; Cyclic prefix; LPC; EVM; OFDM; Linear predicting coding; LTE; Technology and Engineering;

    Sammanfattning : This thesis studies the application of Linear Predictive coding (LPC) in the downlink of Long Term Evolution (LTE) fronthaul, which comprises of BBU and RRH. This can act as an additional module in the existing system. Today, the transmission of a single complex sample from the BBU to the RRH consumes 30 bits. LÄS MER

  3. 7. Shortening time-series power flow simulations for cost-benefit analysis of LV network operation with PV feed-in

    Master-uppsats, Uppsala universitet/Elektricitetslära

    Författare :Claudio David López; [2015]
    Nyckelord :Power flow calculation; quasi-static; time-series; vector quantization; PV generation; low voltage grids; distribution networks; computational performance; execution time;

    Sammanfattning : Time-series power flow simulations are consecutive power flow calculations on each time step of a set of load and generation profiles that represent the time horizon under which a network needs to be analyzed. These simulations are one of the fundamental tools to carry out cost-benefit analyses of grid planing and operation strategies in the presence of distributed energy resources, unfortunately, their execution time is quite substantial. LÄS MER

  4. 8. Adding temporal plasticity to a self-organizing incremental neural network using temporal activity diffusion

    Master-uppsats, KTH/Skolan för datavetenskap och kommunikation (CSC)

    Författare :Emil Lundberg; [2015]
    Nyckelord :ANN; artificial neural network; SOINN; SOTPAR; SOTPAR2; prediction; spatio-temporal pattern detection; temporal activity diffusion; pattern recognition; unsupervised learning; vector quantization; ANN; artificiellt neuralt nätverk; artificiella neurala nätverk; SOINN; SOTPAR; SOTPAR2; förutsägelse; spatio-temporal mönsterdetekion; temporal aktivitetsdiffusion; mönsterigenkänning; oövervakad inlärning; vektorkvantisering;

    Sammanfattning : Vector Quantization (VQ) is a classic optimization problem and a simple approach to pattern recognition. Applications include lossy data compression, clustering and speech and speaker recognition. LÄS MER

  5. 9. Pixel-based video coding

    Uppsats för yrkesexamina på grundnivå, Institutionen för informationsteknologi

    Författare :Johannes Olsson Sandgren; [2014]
    Nyckelord :;

    Sammanfattning : This paper studies the possibilities of extending the pixel-based compression algorithm LOCO-I, used by the lossless and near lossless image compression standard JPEG-LS, introduced by the Joint Photographic Experts Group (JPEG) in 1999, to video sequences and very low bit-rates. Bitrates below 1 bit per pixel are achieved through skipping signaling when the prediction of a pixels sufficiently good. LÄS MER

  7. 10. Article identification for inventory list in a warehouse environment

    Master-uppsats, Högskolan i Halmstad/Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE)

    Författare :Yang Gao; [2014]
    Nyckelord :Object recognition; SIFT feature; Feature matching; DBSCAN; RANSAC; Bag of Words;

    Sammanfattning : In this paper, an object recognition system has been developed that uses local image features. In the system, multiple classes of objects can be recognized in an image. This system is basically divided into two parts: object detection and object identification. LÄS MER