Name
Abstract | ||
|---|---|---|
Layered decoding is well appreciated in low-density parity-check (LDPC) decoder implementation since it can achieve effectively high decoding throughput with low computation complexity. This work, for the first time, addresses low-complexity column-layered decoding schemes and very-large-scale integration (VLSI) architectures for multi-Gb/s applications. At first, the min-sum algorithm is incorporated into the column-layered decoding. Then algorithmic transformations and judicious approximations are explored to minimise the overall computation complexity. Compared to the original column-layered decoding, the new approach can reduce the computation complexity in check node processing for high-rate LDPC codes by up to 90% while maintaining the fast convergence speed of layered decoding. Furthermore, a relaxed pipelining scheme is presented to enable very high clock speed for VLSI implementation. Equipped with these new techniques, an efficient decoder architecture for quasi-cyclic LDPC codes is developed and implemented with 0.13%%m VLSI implementation technology. It is shown that a decoding throughput of nearly 4%Gb/s at a maximum of 10 iterations can be achieved for a (4096, 3584) LDPC code. Hence, this work has facilitated practical applications of column-layered decoding and particularly made it very attractive in high-speed, high-rate LDPC decoder implementation. |
Year | DOI | Venue |
|---|---|---|
2011 | 10.1049/iet-com.2010.1002 | Communications, IET |
Keywords | Field | DocType |
VLSI,codecs,computational complexity,parity check codes,LDPC codes,algorithmic transformation,computation complexity,judicious approximations,low density parity check decoder,reduced complexity column layered decoding,very large scale integration architectures | Concatenated error correction code,Sequential decoding,Computer science,Low-density parity-check code,Serial concatenated convolutional codes,Parallel computing,Decoding methods,List decoding,Very-large-scale integration,Clock rate | Journal |
Volume | Issue | ISSN |
5 | 15 | 1751-8628 |
Citations | PageRank | References |
18 | 1.08 | 10 |
Authors | ||
3 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Zhiqiang Cui | 1 | 18 | 1.08 |
| Zhongfeng Wang | 2 | 35 | 4.74 |
| Xinmiao Zhang | 3 | 18 | 1.08 |