Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Conference contribution/Paper › peer-review
Publication date | 2006 |
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Host publication | Proceedings of 2006 IEEE Information Theory Workshop |
Editors | PZ Fan, P Li, R Yeung |
Place of Publication | NEW YORK |
Publisher | IEEE |
Pages | 91-95 |
Number of pages | 5 |
ISBN (print) | 1-4244-0067-8 |
<mark>Original language</mark> | English |
In this paper we concentrate on rate-1/3 systematic parallel concatenated convolutional codes and their rate-1/2 punctured child codes. Assuming maximum-likelihood decoding over an additive white Gaussian channel, we demonstrate that a rate-1/2 non-systematic child code can exhibit a lower error floor than that of its rate-1/3 parent code, if a particular condition is met. However, assuming iterative decoding, convergence of the non-systematic code towards low bit-error rates is problematic. To alleviate this problem, we propose rate-1/2 partially-systematic codes that can still achieve a lower error floor than that of their rate-1/3 parent codes. Results obtained from extrinsic information transfer charts and simulations support our conclusion.