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From: | Marcus Müller |
Subject: | Re: [Discuss-gnuradio] FM multipath fading simulation issue |
Date: | Fri, 5 Aug 2016 17:04:21 +0200 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.1.0 |
Hi Konrad, Sooo I remember both blog entries on [1] and [2] regarding the flat/Rayleigh fading model. There were fixes to the models in GR, so if you're using those, be sure to use a recent version of GR! Also, as so often, you're right, the public docs of the freq.-selective fading channel model [3] are a bit too sparse. But to be really brutally honest with you here: since you're writing a thesis on this, looking into the source code would've been a good idea; so let me point you to that quickly [4]. If I skim this correctly it's basically a tapped delay line model made up from multiple flat faders! I think the blog posts I referred to are the right thing to look at when understanding those. Note that I really think the documentation isn't quite sufficient here – soooo if you'd want to research how these channel models exactly work, and write up a couple lines of prose about that, you could get eternal fame by extending the documentation here! That would be really appreciated (also, if you happen to let's say incorporate an extensive discussion of channel models in your thesis, and make that thesis publicly available, it'd be totally ok and even appreciated if you'd cite your thesis in what short documentation makes sense in the API docs). Best regards, Marcus [1] http://oshearesearch.com [2] https://www.bastibl.net [3] http://gnuradio.org/doc/doxygen/classgr_1_1channels_1_1selective__fading__model.html [4] https://github.com/gnuradio/gnuradio/blob/master/gr-channels/lib/selective_fading_model_impl.cc On 08/05/2016 11:31 AM, Konrad
Puchalski wrote:
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