Hi David and Simon, Could you use a SSH connection to my Pi here with the FT-897D connected to it? (and backyard dipole here in Sydney)
You will have to email or ring me to arrange frequencies and modes ie. USB/LSB, 80m, 40m or 20m. >From the shell on the PI, you can ssh out or use "wget" to load software. It is on an FTTC (Fibre To The Curb) internet connection with a fixed IP address. This is how Joe K1JT compiled on ARM the early versions of his Soft Decision Decoder in WSJTX. I setup an SSH login on the internet facing machine with another SSH to the Pi. Alan VK2ZIW +61414353013 On Sun, 2 May 2021 13:02:31 +0930, David Rowe wrote > Hi Ross, > > We've already moved through steps 1 (development against software > channel simulator) and step 2 (one-way real world HF Tx to SDRs), > our progress to date is summarised here: > > http://www.rowetel.com/?p=7688 > > As you can see the physical layer aspect of the project is coming > along nicely. We have indeed been developing against CCIR poor > (Multi-Path Poor or MPP in Ionos/Winlink nomenclature), and are > getting encouraging results (see PNG in previous post). > > Simon lives in a flat so even local Tx is difficult for him, and at > this stage of the project (protocol development) he really needs to > test the back to back interactions between two radios. > > The HF/Mimo work sounds interesting, would love to see the papers! > > Thanks, > David > > On 2/5/21 12:27 pm, Ross Whenmouth wrote: > > Hi David & Simon, > > > > To start with, rather than using two back-back radios (presumably with > > a large attenuation factor in the RF connection between the two), you > > could use an HF channel simulator such as; > > GNU Radio https://wiki.gnuradio.org/index.php/Channel_Model > > <https://wiki.gnuradio.org/index.php/Channel_Model> > > Ionos (Winlink) https://winlink.org/content/ionos_simulator > > <https://winlink.org/content/ionos_simulator> > > PathSim http://www.moetronix.com/ae4jy/pathsim.htm > > <http://www.moetronix.com/ae4jy/pathsim.htm> > > (CCIR has published standardised HF channel models (eg CCIR poor) with > > which to configure your channel simulator) > > > > > > Once you are ready to try out your modem "over the air", to start > > with, you probably only need to set up a transmitter at your QTH as > > you are blessed with access to a large number of public web SDRs > > around continental Europe: http://rx.linkfanel.net/ > > <http://rx.linkfanel.net/> > > > > Notably, there are nearby receivers in Karlsruhe and Stuttgart, and if > > you are looking for a longer path (~450 km), the receiver at the > > University of Twente, Enschede, Netherlands is a good option. > > Karlsruhe http://sdr.pjs.de:8073/ <http://sdr.pjs.de:8073/> > > Stuttgart http://dj9kaikiwi.ddns.net:8073/ > > <http://dj9kaikiwi.ddns.net:8073/> > > " http://bat-server.dyndns.org:8073/ > > <http://bat-server.dyndns.org:8073/> > > " http://dl2sba.ddns.net:8073/ <http://dl2sba.ddns.net:8073/> > > University Twente http://websdr.ewi.utwente.nl:8901/ > > <http://websdr.ewi.utwente.nl:8901/> > > > > > > PS: Some very interesting research into 2x2 MIMO for HF digital > > channels has been performed recently - I can send you the papers if > > you are interested. > > > > > > 73 ZL2WRW > > Ross Whenmouth > > > > > > _______________________________________________ > > Freetel-codec2 mailing list > > Freetel-codec2@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/freetel-codec2 > > _______________________________________________ > Freetel-codec2 mailing list > Freetel-codec2@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/freetel-codec2 --------------------------------------------------- Alan VK2ZIW Before the Big Bang, God, Sela. OpenWebMail 2.53, nothing in the cloud. _______________________________________________ Freetel-codec2 mailing list Freetel-codec2@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freetel-codec2
