Abstract
In this paper, a low-rate LDPC-PPM scheme is bring forward which can be applied into UWB communication systems. This scheme can provide good performance with low decoding complexity. By changing the mapping style from coded bits to modulated symbols, not only the iterative operations between decoding and demodulation can be avoided, but also Fast Hadamard Transformation (FHT) and the so called A Posteriori Probability FHT (APP-FHT) algorithm can be adopted to further decrease decoding complexity. It can be proved that this scheme is equivalent to low-rate LDPC-Hadamard codes with BPSK modulation. Simulation results show that this scheme can achieve -1.18 dB at bit error rate 10-5 with data length 65536, which is only worse 0.02 dB than Turbo-Hadamard codes with BPSK modulation.
| Translated title of the contribution | An Encoding and decoding scheme of LDPC codes based on pulse position modulation |
|---|---|
| Original language | Chinese (Simplified) |
| Pages (from-to) | 2630-2633 |
| Journal | 电子与信息学报 |
| Volume | 30 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - Nov 2008 |
Research Keywords
- PPM
- LDPC 码
- 低码率码
- Pulse position modulation
- Low-Density Parity-Check (LDPC) codes
- Low-rate codes
Publisher's Copyright Statement
- This full text is made available under CC-BY-NC-ND 4.0. https://creativecommons.org/licenses/by-nc-nd/4.0/
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