Abstract
This paper proposes a new scheme to construct Raptor codes that can provide unequal error protection (UEP) property. It utilizes joint optimization of UEP-LDPC codes and UEP-LT codes to improve the performance of more important bits (MIB). The density evolution (DE) formulas over binary erasure channels (BEC) are derived. By using the DE formulas, the constructed UEP-Raptor codes are optimized. Simulation results show that, compared with the previous UEP-Raptor codes, the proposed UEP-Raptor codes can get better performances of both MIB and less important bits (LIB).
| Original language | English |
|---|---|
| Pages (from-to) | 966-968+977 |
| Journal | Beijing Ligong Daxue Xuebao/Transaction of Beijing Institute of Technology |
| Volume | 30 |
| Issue number | 8 |
| Publication status | Published - Aug 2010 |
Keywords
- Belief propagation decoding
- Density evolution
- Raptor codes
- Unequal error protection(UEP)