Name
Title | ||
|---|---|---|
Spatially-Coupled Binary Mackay-Neal Codes For Channels With Non-Binary Inputs And Affine Subspace Outputs |
Abstract | ||
|---|---|---|
We study LDPC codes for the channel with 2(m)-ary input (x) under bar is an element of F-2(m) and output (y) under bar = (x) under bar + (z) under bar is an element of F-2(m). The receiver knows a subspace V subset of F-2(m) from which (z) under bar = (y) under bar - (x) under bar is uniformly chosen. Or equivalently, the receiver receives an affine subspace (y) under bar - V where (x) under bar lies. We consider a joint iterative decoder involving the channel detector and the LDPC decoder. The decoding system considered in this paper can be viewed as a simplified model of the joint iterative decoder over non-binary modulated signal inputs e.g., 2(m)-QAM. We evaluate the performance of binary spatially-coupled MacKay-Neal codes by density evolution. The iterative decoding threshold is seriously degraded by increasing m. EXIT-like function curve calculations reveal that this degradation is caused by wiggles and can be mitigated by increasing the randomized window size. The resultant iterative decoding threshold values are very close to the Shannon limit. |
Year | DOI | Venue |
|---|---|---|
2012 | 10.1109/ISIT.2012.6284231 | 2012 IEEE INTERNATIONAL SYMPOSIUM ON INFORMATION THEORY PROCEEDINGS (ISIT) |
Keywords | DocType | Volume |
detectors,convolution,binary codes,convolutional codes,decoding,shannon limit,channel coding,quadrature amplitude modulation | Conference | abs/1202.0979 |
Citations | PageRank | References |
1 | 0.36 | 8 |
Authors | ||
3 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| K. Kasai | 1 | 319 | 33.57 |
| Takayuki Nozaki | 2 | 16 | 10.03 |
| Kohichi Sakaniwa | 3 | 330 | 47.69 |