Title :
Rate-compatible spatially coupled LDPC codes via repeat-accumulation extension
Author :
Wei Hou ; Shan Lu ; Jun Cheng
Author_Institution :
Dept. of Intell. Inf. Eng. & Sci., Doshisha Univ., Kyotanabe, Japan
Abstract :
We propose the construction of rate-compatible spatially coupled low-density parity-check (SC-LDPC) codes. For a given high-rate SC-LDPC mother code, a family of low-rate member codes can be obtained by extending the protogragh of the mother code with repeat-accumulation (RA). Rate compatibility is obtained by adjusting the RA-extension parameters. Continuous code rate is achieved without extra cost. Density evolution analysis shows that the iterative decoding thresholds of all the member codes of the rate-compatible family are very close to the Shannon limits over the binary erasure channels.
Keywords :
iterative decoding; parity check codes; Density evolution analysis; RA-extension parameters; SC-LDPC mother code; Shannon limits; binary erasure channels; iterative decoding thresholds; rate-compatible spatially coupled low-density parity-check codes; repeat-accumulation extension; Convolutional codes; Couplings; Equations; Information processing; Iterative decoding; Turbo codes;
Conference_Titel :
Turbo Codes and Iterative Information Processing (ISTC), 2014 8th International Symposium on
Conference_Location :
Bremen
DOI :
10.1109/ISTC.2014.6955091