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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Refaey, A. Mokhtar, A. Fortier, P. |
| Copyright Year | 2008 |
| Description | Author affiliation: Electr. & Comput. Eng. Dept., Laval Univ., Laval, ON (Refaey, A.) |
| Abstract | A useful tool in the design of reliable digital communication systems is channel coding. Turbo codes have been shown to yield an outstanding coding gain close to theoretical limits in the additive white Gaussian noise (AWGN) channel. In this paper, we applied Wadayamapsilas schemes of the direct current DC-free codes in a cascaded structure with turbo codes under the Maximum a Posteriori (MAP) decoding algorithm. The work done by Deng and Herro [1] impose relatively strong restrictions on the decomposition of the codeword. Wadayama removed such restrictions to treat any decomposition of the codeword. This is the main difference between the two approaches and it is why we used Wadayamapsilas. The proposed scheme achieves the DC-free coding and error-correcting capability simultaneously. A given sequence becomes DC-free if and only if the absolute Running Digital Sum (RDS) value of the sequence is bounded by a constant for any time instant. The RDS control encoder generates a sequence giving the turbo coded sequence a bounded RDS value which results in a high error correcting capability. The high performances in terms of Bit Error Rate (BER) which is very close to the Shannon limits of this simple cascaded structure allows us to expect a new results with other capacity approaching EC block codes, such as low density parity check codes. |
| Starting Page | 001831 |
| Ending Page | 001836 |
| File Size | 411024 |
| Page Count | 6 |
| File Format | |
| ISBN | 9781424416424 |
| ISSN | 08407789 |
| DOI | 10.1109/CCECE.2008.4564862 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2008-05-04 |
| Publisher Place | Canada |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Turbo codes Decoding AWGN Bit error rate Digital communication Channel coding Additive white noise Error correction codes Block codes Parity check codes MAP Decoder Error control codes DC-Free codes Convolutional codes |
| Content Type | Text |
| Resource Type | Article |
| Subject | Electrical and Electronic Engineering Hardware and Architecture |
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