Essays about: "ldpc codes"

Showing result 6 - 10 of 16 essays containing the words ldpc codes.

  1. 6. Comparison of various concatenated convolutional code ensembles under spatial coupling

    University essay from Lunds universitet/Institutionen för elektro- och informationsteknik

    Author : Gabriel Iro; Rajeshwari Kabbinale; [2017]
    Keywords : Technology and Engineering;

    Abstract : A big challenge faced by the digital communication world today is increasing the reliability of information which is being transmitted. During the transmission of information, there is a possibility that the information is corrupted or distorted. READ MORE

  3. 7. Evaluation of flexible SPA based LPDC decoder using hardware friendly approximation methods

    University essay from Lunds universitet/Institutionen för elektro- och informationsteknik

    Author : Afshin Seraj; Deepak Yadav; [2017]
    Keywords : forward-backward; SPA; soft-xor; sum product algorithm; approximation; decoder; LDPC; Technology and Engineering;

    Abstract : Due to computation-intensive nature of LDPC decoders, a lot of research is going towards efficient implementation of their original algorithm (SPA). As "Min-Sum" approximation is basically an overestimation of SPA, this thesis investigates more accurate, yet area efficient, approximations of SPA, to select an optimum one. READ MORE

  4. 8. Analysis of the finite length performance of spatially coupled convolutional codes

    University essay from Lunds universitet/Institutionen för elektro- och informationsteknik

    Author : Ardiana Osmani; Hector Moreno Trujillo; [2015]
    Keywords : Spatial coupling; convolutional codes; braided convolutional codes; parallel concatenated codes; spatially coupled parallel concatenated codes; spatially coupled braided convolutional codes; BCJR algorithm; Technology and Engineering;

    Abstract : Error control coding is an essential part of any well-designed digital communication system. It has been used in structures to protect the information, by enabling reliable delivery of digital data over unreliable communication channels. Even though this is an old topic, enlisted by Shannon in the late 40's, a lot of research is still going on. READ MORE

  5. 9. File-Based Delivery over LTE-Based MBMS

    University essay from Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

    Author : Ravichandran Sivawamy; Geethanjali Soundappan; [2013]
    Keywords : RaptorQ; Raptor; AL-FEC; MBMS; FLUTE;

    Abstract : One of the most important emerging aspects of Third Generation Partnership Project (3GPP) is the Multimedia Broadcast/Multicast Service (MBMS) aiming to deliver multimedia contents to mobile users more efficiently in point-to-multipoint way. 3GPP also recommends an Application Layer Forward Error Correction (AL-FEC) scheme, especially for MBMS, in order to provide reliable transmission over mobile networks. READ MORE

  6. 10. Investigation of LDPC code in DVB-S2

    University essay from Datorteknik; Tekniska högskolan

    Author : Hanxiao Ge; [2012]
    Keywords : LDPC code; DVB-S2; Restructured parity-check matrix; Layered message passing LMP ; Reconstructed decoding table;

    Abstract : As one of the most powerful error-correcting codes, Low-density parity check codes are widely used in digital communications. Because of the performance of LDPC codes are capable to close the shannon limited extraordinarily, LDPC codes are to be used in the new Digital Video Broadcast-Satellite-Second Generation(DVB-S2) and it is the first time that LDPC codes are included in the broadcast standard in 2003. READ MORE