Full metadata record
DC FieldValueLanguage
dc.contributorFaculty of Engineeringen_US
dc.contributor.advisorSham, Chiu-wing (EIE)-
dc.creatorLu, Qing-
dc.identifier.urihttps://theses.lib.polyu.edu.hk/handle/200/8007-
dc.languageEnglishen_US
dc.publisherHong Kong Polytechnic University-
dc.rightsAll rights reserveden_US
dc.titleArchitecture design of QC-LDPC decoder with cyclicly-coupled codesen_US
dcterms.abstractOut of the need for a superb forward error correction (FEC) scheme, the well known low-density parity-check (LDPC) codes arouse our interest. With Belief Propagation (BP) decoding, this class of channel codes demonstrates a limit-approaching ability but implementation issues remain. This thesis focus-es on designing a decoder architecture with excellent error performance, high throughput and low complexity. In this work, a sub-class of LDPC codesquasi-cyclic LDPC (QC-LDPC) codesis investigated and decoded with quantized sum-product algorithm (SPA). An optimized RAM-based decoder architecture with extraordinary performance is proposed. Considering the implementation issues, codes with cyclicly coupled structure are proposed. At the cost of a slight increase in architectural redundancy, the decoders for these codes achieve a significant improvement in bit error rate (BER). The proposed architecture has been implemented onto a field programmable gate array (FPGA) for a 98304-bit 5/6-rate cyclicly-coupled QC-LDPC (CC-QC-LDPC) code. The experimental results show no error floor above a BER of 10¹⁴. As the bit-energy-to-noise power-spectral-density ratio (Eb/N0) goes up to 3.50 dB, no errors are detected among the 1.14 × 10¹⁶ decoded bits. Besides, the architectural throughput of our implementation is up to 1.9 Gbps at a clock rate of 100 MHz.en_US
dcterms.extentxi, 78 leaves : illustrations ; 30 cmen_US
dcterms.isPartOfPolyU Electronic Thesesen_US
dcterms.issued2014en_US
dcterms.educationalLevelAll Masteren_US
dcterms.educationalLevelM.Sc.en_US
dcterms.LCSHSignal processing.en_US
dcterms.LCSHError-correcting codes (Information theory)en_US
dcterms.LCSHHong Kong Polytechnic University -- Dissertationsen_US
dcterms.accessRightsrestricted accessen_US

Files in This Item:
File Description SizeFormat 
b28110602.pdfFor All Users (off-campus access for PolyU Staff & Students only)4.45 MBAdobe PDFView/Open


Copyright Undertaking

As a bona fide Library user, I declare that:

  1. I will abide by the rules and legal ordinances governing copyright regarding the use of the Database.
  2. I will use the Database for the purpose of my research or private study only and not for circulation or further reproduction or any other purpose.
  3. I agree to indemnify and hold the University harmless from and against any loss, damage, cost, liability or expenses arising from copyright infringement or unauthorized usage.

By downloading any item(s) listed above, you acknowledge that you have read and understood the copyright undertaking as stated above, and agree to be bound by all of its terms.

Show simple item record

Please use this identifier to cite or link to this item: https://theses.lib.polyu.edu.hk/handle/200/8007