#43 Duo binary turbo codec

[geniusbb]

Hi,

Do you think we will have duo binary turbo codec in the
future ? It is used in IEEE 802.16e-2005 and I think it
will be widely used too. cheers

BR,
Arthur.

[Adam Piątyszek]

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Hi Arthur,

You are welcome to start writing the duo-binary turbo code
class ;) We also agree, that it would b widely used by the
IT++ community.
Please, let us know, if you have something to add to the
library.

BR,
/ediap

[geniusbb]

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Hi,

I am happy to do that, but my background wasn't in channel
coding. If you can give me some reference, I can do some
reading and write some codes when I have time. Will be a
huge difference from the existing IT++ turbo codec ? Do they
use the same RSC & MAP decoder ?

Regards,
Arthur.

[Adam Piątyszek]

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Dear Arthur,

Here you can find some reference documentation on DBTC
(found by Google):
[1] http://perso.enst-bretagne.fr/~douillar/Publis/ISTC2000.pdf
[2] http://www.stanford.edu/~erstauff/duobinary.pdf

As for your further questions, I do not know if some parts
of the current Turbo_Codes class can be reused. I guess,
that the RSC might be slightly different, so I would start
with writing and testing the CRSC used in DBTC...

I am glad to hear that you are interested in helping with
the development of the IT++ library :)

BR,

/ediap

[SamuraiDexter]

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I have complete C implementation of the Duobinay turbo codes specified in IEEE 802.16e-2005 standard.
Let me try to port it on IT++

Regards,

[Adam Piątyszek]

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Hi Arun,

Thanks for your great offer! Please update this request, when you have something usable.
I am increasing the priority of this request and wait for your first contribution.
BTW, you might consider using LLR_Calc_unit class for LLR algebra.

BR,
/ediap