| WWW.BALMELLI.NET
- contact
COMMUNICATION
PIC SEMINARS |
| >home>seminars |
| Organizing committee
Laurent Balmelli
Dinesh Verma
Olivier Verscheure
Pascal Frossard
Dakshi Agrawal
Anees A Shaikh
Parviz Kermani
|
|
|
|
IBM T.J. Watson Center -
Seminars in Communications - Announcement
Turbo Codes
Speaker
Dakshi Agrawal
IBM Research
| In this talk, I would present
a brief overview of what channel codes are and how the recently discovered
channel codes achieve theoretical limits on transmission over a wide variety
of channel. I will introduce several new channel codes, most notably turbo
codes. The decoding of these new channel codes would be explained as a
belief propagation algorithm on a bipartite graph with one set of vertices
representing variables and another set of vertices representing the constraints.
If the time permits, I will show connections of these with the Tornado
codes which are proposed by Digital Fountain to make faster downloads of
large files. |
| Material
papers:
Near Optimum
Error Correcting Coding and Decoding: Turbo-Codes by Claude Berrou and
Alain Glavieux published in IEEE Transactions on Communications, Vol
44, No 10, October 1996.
Factor
Graphs and the Sum-Product Algorithm by F R Kschischang, B J Frey, H.-A.
Loeliger published in IEEE Transactions on Information Theory, Vol47,
February 2001.
|
|
|
