Re: [Discuss-gnuradio] [GSoC2018][Standard FEC Decoders][Need Feedback]

[CEL]

Hi Harshit Gupta,

thanks for showing up and being interested in GNU Radio! 
I'm very happy that someone with an information theory background
decided to give channel code implementations a try. 

From a quick scan of the proposal, I'd say that you have not adhered to
all the mandatory things on our GSoCStudentInfo wiki page; doing so is
mandatory, so please make sure to really check of *all* the items on
that list, or your proposal might simply not be eligible.

I'm missing a bit on your personal experience and background. You
really don't seem to follow the "Background on yourself" section on the
aforementioned Wiki page at all. Is this the first time you're
implementing channel codes or using C++, do you have experience in
optimizing existing code? Can you show us code you've written? I'm
really excited about all the cool stuff that we could do if you did
your GSoC on this, but we need to know who we're dealing with, and what
the skills are that you bring to this very challenging proposal.

You cite a lot from two papers, which is very fine by me, but doesn't
really allow myself to understand what part you're expecting to have to
implement yourself, and what part is existing code? If I understand
your proposal correctly, you aim to do all en- and decoding on GPU, not
CPU, which is cool, but also raises the question of your experience in
that field, and access to hardware you have.

From an aesthetic point of view, the citing/copying from different
sources doesn't really make for a consistent flow while reading. This
isn't top priority, but you might want to get your proposal as nice as
you would want a job application to be by the moment you finally upload
it.

Best regards,
Marcus

On Thu, 2018-03-22 at 19:06 +0000, Harshit Gupta wrote:
> Greetings, 
> 
> My name is Harshit Gupta, graduated in Electrical Engineering. Currently 
> pursuing masters from Indian Institute of Technology, Delhi.  Having studied 
> information theory in my post-graduate coursework, I can understand FEC codes 
> in a better manner. I want to contribute to GNU Radio with my coding skills 
> and knowledge of channel coding.
>  I am very interested to work on FEC decoders particularly starting from LDPC 
> decoders. GNU Radio would benefit from these integrations.
> 
> The gr-fec API by GNU is an implementation of a few channel coding techniques 
> but are quite slow to be used in high throughput applications. The current 
> issue is to use standardized decoders in the coding techniques to make gr-fec 
> API suitable for high-performance applications and integrate it with GNU 
> radio.
> 
> I went through some recent research paper like in QPP-Block-LDPC Codes which 
> proposes new approaches to implement the existing codes. The relevant list 
> can be found here[1].
> 
> I went through gr::fec::code::cc_encoder Class and 
> gr::fec::code::ccsds_encoder, which implements the above code that is more 
> highly optimized for specific settings (rate 1/2, K=7, and polynomials [109, 
> 79]).
> 
> Also, I went through the application of LDPC. It seems 5G will greatly 
> benefit from fast LDPC code. A project on fast implementation of LDPC code 
> will be a good experience. I searched through 3GPP 38 series of documents [2] 
> and found the used LDPC algorithm. 
> I have listed out steps for optimal implementation.
> 
> My queries are:
> 1. what kind of generic code for decoder I should add in my proposal?
> 2.Please look at my draft proposal[3]. Is there any redundant information?
> 3. Fast LDPC decoder and optimal implementation of 3GPP used LDPC codes Both 
> are good but which to choose?
> 
> 
> Deadline is quite near. Hence I am diligently working on the proposal
> 
> Links:
> [1] http://aff3ct.github.io/hof_ldpc.html
> [2] http://www.3gpp.org/DynaReport/38-series.htm
> [3] 
> https://github.com/harshit4084/MyDoc/blob/master/gsoc2018_Harshit_Gupta.pdf
> 
> 
> . 
> 
> Thank you,
> Harshit Gupta
> 
> 
> 
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