Abstract
In 3D-Turbo codes, part of parity bits from conventional Turbo encoder are encoded again by a post-encoder to reduce the number of low-weight codes and achieve better error floor performance. Considering the residual low-weight codes in 3D-Turbo codes, an irregular pattern design is proposed to further improve the error floor. All-zero iterative decoding algorithm is firstly utilized to identify the distribution of “1” in low-weight codes. Then an irregular pattern is optimized based on the distribution to eliminate low-weight codes. Finally, taking a practical 3D-Turbo codes, we adopt the proposed irregular pattern to increase the minimum Hamming distance from 18 to 20, which validates the effectiveness of our contribution.
| Original language | English |
|---|---|
| Pages (from-to) | 523-527 |
| Number of pages | 5 |
| Journal | Xibei Gongye Daxue Xuebao/Journal of Northwestern Polytechnical University |
| Volume | 35 |
| Issue number | 3 |
| State | Published - 1 Jun 2017 |
Keywords
- Channel coding
- Error floor
- Hamming distance
- Iterative decoding