Abstract
Anytime transmission has been shown to be an effective means of stabilizing an unstable system over noisy channels. A crucial issue in implementing anytime transmission strategies is the design of anytime codes that offer good finite-length performance and asymptotic anytime properties. This paper introduces an efficient anytime code derived from protograph-based low-density parity-check convolutional codes known as extended S-LDPCC (XS-LDPCC) codes. The asymptotic anytime properties of XS-LDPCC codes over both the binary erasure channel (BEC) and the binary-input additive white Gaussian noise (BIAWGN) channel are demonstrated through density evolution. By means of certain observations verified by simulations, we provide accurate estimates of the delay exponents of XS-LDPCC codes over the BEC and the BIAWGN channel. Through simulations, the finite-length performance of XS-LDPCC codes and the effects of different code design parameters are quantified.
| Original language | English |
|---|---|
| Article number | 7549049 |
| Pages (from-to) | 4057-4069 |
| Number of pages | 13 |
| Journal | IEEE Transactions on Communications |
| Volume | 64 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - Oct 2016 |
| Externally published | Yes |
Keywords
- Anytime codes
- delay exponent
- density evolution
- LDPC convolutional codes
- protograph-based codes