Decoder Architectures for Low-Density Parity-Check Codes

Name: Decoder Architectures for Low-Density Parity-Check Codes
Brand: VDM Verlag
SKU: 9783639380071
Price: 254.01 RON
Availability: InStock

Design and Implementation Towards Low Error Floor Performance

Autor: Xiaoheng Chen

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Editura: VDM Verlag

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Recently, LDPC codes are considered for applications such as high-speed satellite and optical commun...

Informații despre carte

Autor

Xiaoheng Chen

Limbă

engleză

Legare

Carte - Carte broșată

Publicat

2011

Pagini

120

EAN

9783639380071

ISBN

363938007X

Enbook ID

06844469

Editura

VDM Verlag

Greutate

186

Dimensiuni

152 x 229 x 7

Descriere completă

Recently, LDPC codes are considered for applications such as high-speed satellite and optical communications, the hard disk drives, and high- density flash memory based storage systems, which require that the codes are free of error-floor down to extremely low bit error rates. FPGAs are usually used to evaluate the error performance of codes. However, existing FPGA-based LDPC decoders fail to utilize the configurability and read-first mode of embedded memory in the FPGAs, and thus result in limited throughput and codes sizes. Four optimization techniques, i.e., vectorization, folding, message relocation, and circulant permutation matrix sharing, are proposed to improve the throughput, scalability, and efficiency of FPGA-based decoders. Using the above techniques, codes are shown to have no error-floor down to the BER of 10E-14. Also, it is very difficult to construct codes that do not exhibit an error floor down to 10E-15 or so. Without detailed knowledge of dominant trapping sets, a backtracking- based reconfigurable decoder is designed to lower the error floor of a family of structurally compatible quasi-cyclic LDPC codes by one to two orders of magnitudes.

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Decoder Architectures for Low-Density Parity-Check Codes

Design and Implementation Towards Low Error Floor Performance

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Descriere completă

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