Essays about: "low density parity check ldpc codes"

Showing result 6 - 10 of 13 essays containing the words low density parity check ldpc codes.

  1. 6. 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

  3. 7. 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

  4. 8. 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

  5. 9. Root LDPC Codes for Non Ergodic Transmission Channels

    University essay from Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

    Author : Tarique Inayat Bhutto; [2011]
    Keywords : Non-Binary Root LDPC codes; LDPC codes; Binary-Root LDPC codes;

    Abstract : 4 ABSTRACT Tremendous amount of research has been conducted in modern coding theory in the past few years and much of the work has been done in developing new coding techniques. Low density parity check (LDPC) codes are class of linear block error correcting codes which provide capacity performance on a large collection of data transmission and storage channels while Root LDPC codes in this thesis work are admitting implementable decoders with manageable complexity. READ MORE

  6. 10. Construction and Performance Evaluation of QC-LDPC Codes over Finite Fields

    University essay from Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

    Author : Sohail Noor; Ihsan Ullah; [2010]
    Keywords : Low Density Parity Check LDPC codes; Finite Fields;

    Abstract : Low Density Parity Check (LDPC) codes are one of the block coding techniques that can approach the Shannon’s limit within a fraction of a decibel for high block lengths. In many digital communication systems these codes have strong competitors of turbo codes for error control. READ MORE