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Re: [Discuss-gnuradio] Softbits in gr-ieee 802.11 ?


From: Bastian Bloessl
Subject: Re: [Discuss-gnuradio] Softbits in gr-ieee 802.11 ?
Date: Thu, 18 Jan 2018 12:06:37 +0000
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.5.0

Hi,

you are right. The current implementation does not use soft-bits but feeds hard bits into the decoder.

In 2013, I used the soft-input Viterbi decoder from the IT++ library.

http://itpp.sourceforge.net/4.3.1/convcode.html

Best,
Bastian

On 01/17/2018 11:36 AM, sumit kumar wrote:
Hi,

I am doing some proof of concept using gr-ieee 802.11.
The paper by author [1] says that it uses softbits, however in the method

*constellation::decision_maker(const gr_complex *sample)*, I see outputs as hardbits. Am I missing something here i.e. any particular commit or branch where the softbits implementation is there.

  Its very important for my algorithm to use softbits :-/

[1] https://conferences.sigcomm.org/sigcomm/2013/papers/srif/p9.pdf

Sumit



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