Códigos LDPC quaternários aplicados à técnica de transmissão OFDM

doi:https://doi.org/10.47749/t/unicamp.2010.779150

Open AccessDissertation10.47749/t/unicamp.2010.779150

Códigos LDPC quaternários aplicados à técnica de transmissão OFDM

Maria Leopoldina Martins Neves Seixas Gonçalves-2010-11-12

TL;DRAbstract

This dissertation addresses the study of error correcting codes based on sparse non-binary matrices. The LDPC (Low Density Parity Check) codes constitute a efficient family of codes generated by sparse parity check matrices and it is considered as one of the classes of codes that presents the best performance in digital communications systems. LDPC codes over the ring of integers modulo-4 (Z 4 ) are the main focus of this work. The standard proposed by SBTVD (Brazilian Digital Television System) is used as reference for performance comparisons.

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This dissertation addresses the study of error correcting codes based on sparse non-binary matrices. The LDPC (Low Density Parity Check) codes constitute a efficient family of codes generated by sparse parity check matrices and it is considered as one of the classes of codes that presents the best performance in digital communications systems. LDPC codes over the ring of integers modulo-4 (Z 4 ) are the main focus of this work. The standard proposed by SBTVD (Brazilian Digital Television System) is used as reference for performance comparisons.

Keywords

Low-density parity-check codeOrthogonal frequency-division multiplexingAdditive white Gaussian noiseAlgorithmConcatenated error correction codeForward error correctionTurbo codeComputer science

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