Rate-compatible QC-LDPC codes design in powerline communication systems

Author

Liu, Zaishuang ; Peng, Kewu ; Lei, Weilong ; Qian, Chen ; Wang, Zhaocheng

Author_Institution

Dept. of Electron. Eng., Tsinghua Univ., Beijing, China

fYear

2012

fDate

27-30 March 2012

Firstpage

126

Lastpage

131

Abstract

Low-density parity-check (LDPC) codes are an important choice of the error correction codes in broadband powerline communication (PLC) systems. In this paper, a "column extension" design method for rate-compatible quasi-cyclic (QC) LDPC codes is proposed, which can provide efficient multi-rate QC-LDPC schemes for PLC systems. Based on the optimization of degree distributions among multi-rate LDPC codes, excellent performance can be achieved at each code rate. Benefiting from the nested matrix structure, the designed QC-LDPC codes facilitate the implementation of multi-rate encoder/decoder and offer the advantage of low-complexity. A comparison with the QC-LDPC codes in ITU-T G.9960 specification is performed, where the effectiveness of the proposed method and the superior performance of our designed codes are validated via extrinsic information transfer (EXIT) chart analysis and bit error rate (BER) simulations.

Keywords

broadband networks; carrier transmission on power lines; cyclic codes; error correction codes; error statistics; matrix algebra; optimisation; parity check codes; telecommunication standards; BER; EXIT chart; ITU-T G.9960 specification; QC-LDPC code design; bit error rate; broadband PLC system; column extension design method; degree distribution; error correction codes; extrinsic information transfer; low density parity check; multirate decoder; multirate encoder; nested matrix structure; optimization; power line communication; quasi-cyclic code; Bit error rate; Broadband communication; Decoding; Design methodology; Forward error correction; Parity check codes; Simulation; EXIT chart; PLC; QC-LDPC; Rate-compatible; degree distribution; multi-rate;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Line Communications and Its Applications (ISPLC), 2012 16th IEEE International Symposium on

Conference_Location

Beijing

ISSN

PENDING

Print_ISBN

978-1-4673-0359-0

Electronic_ISBN

PENDING

Type

conf

DOI

10.1109/ISPLC.2012.6201311

Filename

6201311