My 2 cents to get you started.. Gpredict is a good option to track satellites, it uses Hamlib compatible protocols to communicate with radio's and rotators. In this case your gnu radio is your rig.
I have been developing lots of software around the Hamlib protocols. And know there have been lots of talks about making Hamlib work with gnu radio. A simple search with Google for "Hamlib gnuradio" gives lots of results, however this link might be exactly what you are looking for: http://destevez.net/2015/11/doppler-correction-with-gnuradio/ It talks about gr-gpredict-dopler ... Which is not confirmed to be working (by me) but by the looks of it the link would get you going. Martijn Verstuurd vanaf mijn iPad > Op 2 apr. 2016 om 07:11 heeft ERNEST MATEY <ernestmatey...@gmail.com> het > volgende geschreven: > > Dear Marcus, > > Thank you very much for reply! > This might be for the fact, I being new to these. > > However, in summary, please this is what I am and want to do > > 1) I have to track Satellite to receive CW signal. > 2) I am using HackRf. > 3) CW signal processing is on GRC. > 4) I need to do doppler shifting for my satellite tracking. > 5) I need to know how to achieve doppler shifting. > 6) I need to know how to measure time of arrival of CW signal with my DSP. > > Thank you very much > Ernest. > > Sent from my BlackBerry 10 smartphone. > From: Marcus Müller > Sent: Friday, April 1, 2016 9:15 PM > To: ERNEST MATEY; discuss-gnuradio@gnu.org > Subject: Re: [Discuss-gnuradio] DOPPLER SHIFT > > well, kind of > I think you're confusing different things: > > * Hardware: Your HackRF has the job of tuning to a center frequency, things > like gain and giving you a lot of signal samples from there. > * Doppler Tracking: There's software that can calculate the doppler a signal > has that comes from a satellite as it passes over you > * libHackRF: This is the software to talk to your HackRF. It has the job of > setting parameters like gain and center frequency on the HackRF, and get the > samples from the HackRF > * GNU Radio: A software defined radio framework that let's you use signal > processing blocks. So far, we haven't talked about that at all, so I kind of > wonder why you're asking us :) Not that I mind, but I think we should try to > give this discussion to some distinctive direction. > > So, what is it that you need to do? Maybe if you could come up with some > sketch of what you want to achieve, it'll be easier to explain what you need. > > Best regards, > Marcus > > >> On 01.04.2016 21:26, ERNEST MATEY wrote: >> Thank you much Marcus, >> >> I tried reading on internet about libHackRf but no introductions. >> >> However, from your comment, I suggest it means I can connect HackRf to >> tracking software doppler using LibHackRf! >> >> Is that it? >> >> Best Regards >> Ernest. >> >> Sent from my BlackBerry 10 smartphone. >> From: Marcus Müller >> Sent: Friday, April 1, 2016 7:49 PM >> To: ERNEST MATEY; discuss-gnuradio@gnu.org >> Subject: Re: [Discuss-gnuradio] DOPPLER SHIFT >> >> Dear Ernest, >> >> Haven't used that, but hamlib is something completely different than >> Gpredict; it's meant to control ham radio equipment, not to predict doppler >> shift. If I can get that right from quickly having a glimpse at hamlib, it >> seems like it was written for hardware that connects to (or emulates a) >> sound card. The HackRF isn't one of these, so you won't be able to interface >> it with hamlib. Why would you, too? It's bandwidth is much greater, and >> with gr-osmosdr, there's a very mature and well-maintained interface to >> GNU Radio. You'll need libhackrf. >> >> Generally, for frequencies you can receive with something like the HackRF, a >> quick, rough estimate tells me that LEO satellites (which probably are what >> you're concerned about) won't exhibit much more than a couble kHz Doppler; >> you usually would not re-tune the SDR frontend to correct that, but get a >> bandwidth that's big enough to contain all your receive spectrum over its >> full Doppler shift range. >> >> Best regards, >> Marcus >> >>> On 01.04.2016 20:25, ERNEST MATEY wrote: >>> Hi Marcus and All >>> >>> Thank you very much for your reply >>> Apart from Gpredict, which other way could I use for doppler shifting for >>> satellite tracking. >>> Please what do you say about Hamlib? >>> Which other method can I use to control HackRF frequency from satellite >>> tracker on GNUradio? >>> >>> Best Regards >>> Ernest. >>> >>> Sent from my BlackBerry 10 smartphone. >>> From: Marcus Müller >>> Sent: Friday, March 18, 2016 6:35 PM >>> To: discuss-gnuradio@gnu.org >>> Subject: Re: [Discuss-gnuradio] DOPPLER SHIFT >>> >>> Hi Ernest, >>> I saw your first mail, too, but I was really busy at that time. >>> >>> Now, what your error message indicates is that gpredict wasn't properly >>> installed. Not having used that myself, I can't really be of much help, but >>> you should first of all check that if you run a python2 prompt, "import >>> gpredict" doesn't fail with the same error. >>> >>> Best regards, >>> Marcus >>> >>>> On 03/18/2016 12:43 PM, ERNEST MATEY wrote: >>>> Hi All, >>>> >>>> I am trying to track Satellite for CW signal receiving and analysis on my >>>> GNURadio. >>>> I know I need some tracking with Doppler shift. >>>> What is the best way to do this? >>>> >>>> Now, I have GPredict installed hoping to use it. >>>> I have added the GPredict doppler block to my GRC library blocks and added >>>> the block to my flow graph hoping to get Doppler shift from my engaged >>>> GPredict >>>> I have set my Ports correctly but I have an error. >>>> >>>> ImportError: No module named gpredict. >>>> >>>> What can I do? >>>> >>>> I also learnt I can control my receiver ( Hackrf) frequency directly from >>>> Gpredict using Hamlib. Will this work? >>>> I tried to install Hamlib but installation says will delete some GRC files >>>> before Hamlib will work. I don't want to temper with my healthy running >>>> GRC >>>> >>>> What can I do for my Doppler Shift? >>>> >>>> I am on Ubuntu 14 and I am very new to these thing >>>> >>>> Thank you for sharing your expertise. >>>> God Bless you! >>>> >>>> >>>> >>>> >>>> Sent from my BlackBerry 10 smartphone. >>>> >>>> >>>> >>>> >>>> >>>> _______________________________________________ >>>> Discuss-gnuradio mailing list >>>> Discuss-gnuradio@gnu.org >>>> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
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