Re: [Discuss-gnuradio] Qt GUI: Water falls the wrong direction

2017-08-26 Thread Marcus Müller
Well, what he does is that if you build something where water runs uphill, you'd still call it "waterfall (reversed)", because that's what people would immediately understand. On 25.08.2017 23:43, Andrew Rich wrote: > Are you telling me water does run uphill ? > > Sent from my iPhone > >> On 26

Re: [Discuss-gnuradio] Packet encoding example (Packet_loopback_hier.grc)

2017-08-26 Thread Marcus Müller
Hi Mehtap, huh, if increasing sps = 100 is all that it takes to trigger this, then this is probably¹ a bug. And as such, we should fix it. Just to confirm: If you take a totally unmodified packet_loopback_hier.grc and **only** change sps=100, then you get this? Generally, sps=100 seems… unintuiti

Re: [Discuss-gnuradio] Qt GUI: Water falls the wrong direction

2017-08-26 Thread Anon Lister
I fully support calling it the water rise sink. I once implemented a waterfall, was very proud of my implementation. It was smooth, handled high bandwidths without taxing CPU. Showed to boss... I got a blank stare "Uhh, well I've never seen one going up... It's going the wrong way." :( Wish

[Discuss-gnuradio] Using Correlate Estimation with hardware

2017-08-26 Thread Sebastian
Hi all, i run into trouble using the correlate estimation block. As far as i understand this blocks is used to search for a praeamble which is modulated and filtered with match filter. To achieve this i used modulate vector. I used this block like it`s done in the corr_est exapmles provided

Re: [Discuss-gnuradio] Using Correlate Estimation with hardware

2017-08-26 Thread Marcus Müller
Hi Sebastian, well, it would sound like you've discovered the multipath channel! I don't really understand what you mean with "Modulate vector is called"; what /is/ "Modulate vector"? You can actually simply attach small files to emails to the list. Such a simple GRC file would certainly not ups

Re: [Discuss-gnuradio] Packet encoding example (Packet_loopback_hier.grc)

2017-08-26 Thread Dan CaJacob
I am offering advice without looking at the flowgraph, so take this with a grain of salt, but sps usually stands for samples per *symbol*, not seconds. On Sat, Aug 26, 2017 at 4:04 AM Marcus Müller wrote: > Hi Mehtap, > > huh, if increasing sps = 100 is all that it takes to trigger this, then >

Re: [Discuss-gnuradio] Help understanding AX.25 encoding and tagged streams

2017-08-26 Thread Robert McGwier
At one time rational resampling meant that the interpolation and decimation were each integers so the rate change is the ratio of two integers and thus rational. If one or more of your inputs is fractional I believe you need the arbitrary rate resampler. Bob On Aug 15, 2017 10:16 PM, "Cinaed Si

Re: [Discuss-gnuradio] Simulating non linearity and distortion

2017-08-26 Thread Robert McGwier
And one of the best talks Matt Ettus has ever given was his talk on learning about impairments using gnuradio. See if you can dig that up or maybe someone can point to it that has a better memory than mine. Bob On Aug 18, 2017 1:45 PM, "Marcus Müller" wrote: > Yes. There's a whole category "i

Re: [Discuss-gnuradio] Simulating non linearity and distortion

2017-08-26 Thread Dan CaJacob
Here they are: https://www.youtube.com/watch?v=wqKNUXDdIvU https://www.youtube.com/watch?v=PNMOwhEHE6w The blocks that he uses in the presentations have been a part of core GNURadio for a while, so you can use them yourself to help understand things. This is what Marcus was refering to. On Sat,